Updated on 2024/10/01

写真a

 
JUNG Jieun
 
Organization
Graduate School of Science Lecturer
Graduate School
Graduate School of Science
Undergraduate School
School of Science Department of Chemistry
Title
Lecturer

Degree 1

  1. 博士(工学) ( 2015.3   大阪大学 ) 

Research Interests 1

  1. photocatalyst

Research Areas 1

  1. Nanotechnology/Materials / Inorganic/coordination chemistry

 

Papers 32

  1. Ferrocenyl PNNP Ligands-Controlled Chromium Complex-Catalyzed Photocatalytic Reduction of CO<sub>2</sub> to Formic Acid

    Wakabayashi, T; Kametani, Y; Tanahashi, E; Shiota, Y; Yoshizawa, K; Jung, J; Saito, S

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY     2024.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jacs.4c03683

    Web of Science

    PubMed

  2. Photocatalytic CO2 Reduction Using an Osmium Complex as a Panchromatic Self‐Photosensitized Catalyst: Utilization of Blue, Green, and Red Light

    Kenji Kamada, Jieun Jung, Chihiro Yamada, Taku Wakabayashi, Keita Sekizawa, Shunsuke Sato, Takeshi Morikawa, Shunichi Fukuzumi, Susumu Saito

    Angewandte Chemie International Edition   Vol. 63 ( 22 )   2024.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    The photocatalytic reduction of carbon dioxide (CO2) represents an attractive approach for solar‐energy storage and leads to the production of renewable fuels and valuable chemicals. Although some osmium (Os) photosensitizers absorb long wave‐lengths in the visible‐light region, a self‐photosensitized, mono‐nuclear Os catalyst for red‐light‐driven CO2 reduction has not yet been exploited. Here, we discovered that the introduction of an Os metal to a PNNP‐type tetradentate ligand resulted in the absorption of light with longer‐wavelength (350–700 nm) and that can be applied to a panchromatic self‐photosensitized catalyst for CO2 reduction to give mainly carbon monoxide (CO) with a total turnover number (TON) of 625 under photoirradiation (λ ≥ 400 nm). CO2 photoreduction also proceeded under irradiation with blue (λ0 = 405 nm), green (λ0 = 525 nm), or red (λ0 = 630 nm) light to give CO with &gt;90% selectivity. The quantum efficiency using red light was determined to be 12% for the generation of CO. A catalytic mechanism is proposed based on the detection of intermediates using various spectroscopic techniques, including transient absorption, electron paramagnetic resonance, and UV−vis spectroscopy.

    DOI: 10.1002/anie.202403886

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    PubMed

  3. Importance of steric bulkiness of iridium photocatalysts with PNNP tetradentate ligands for CO<sub>2</sub> reduction

    Kenji Kamada, Jieun Jung, Yohei Kametani, Taku Wakabayashi, Yoshihito Shiota, Kazunari Yoshizawa, Seong Hee Bae, Manami Muraki, Masayuki Naruto, Keita Sekizawa, Shunsuke Sato, Takeshi Morikawa, Susumu Saito

    Chemical Communications   Vol. 58 ( 66 ) page: 9218 - 9221   2022.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry (RSC)  

    Steric bulkiness – the metric of the robustness of the self-photosensitized, single metal-active-site catalysis, elucidated in CO<sub>2</sub> photoreduction.

    DOI: 10.1039/d2cc01701f

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    PubMed

  4. A Highly Durable, Self-Photosensitized Mononuclear Ruthenium Catalyst for CO2 Reduction

    Kenji Kamada, Hiroko Okuwa, Taku Wakabayashi, Keita Sekizawa, Shunsuke Sato, Takeshi Morikawa, Jieun Jung, Susumu SAITO

    Synlett   Vol. 33 ( 12 ) page: 1137 - 1141   2022.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Georg Thieme Verlag KG  

    A novel mononuclear ruthenium (Ru) complex bearing a PNNP-type tetradentate ligand is introduced here as a self-photosensitized catalyst for the reduction of carbon dioxide (CO2). When the pre-activation of the Ru complex by reaction with a base was carried out, an induction period of catalyst almost disappeared and the catalyst turnover numbers (TONs) over a reaction time of 144 h reached 307 and 489 for carbon monoxide (CO) and for formic acid (HCO2H), respectively. The complex has a long lifespan as a dual photosensitizer and reduction catalyst, due to the sterically bulky and structurally robust (PNNP)Ru framework. Isotope labeling experiments under 13CO2 atmosphere indicate that CO and HCO2H were both produced from CO2.

    DOI: 10.1055/a-1709-0280

    Web of Science

  5. Photocatalytic CO<sub>2</sub> Reduction Using an Iron–Bipyridyl Complex Supported by Two Phosphines for Improving Catalyst Durability

    Taku Wakabayashi, Kenji Kamada, Keita Sekizawa, Shunsuke Sato, Takeshi Morikawa, Jieun Jung, Susumu Saito

    Organometallics   Vol. 41 ( 14 ) page: 1865 - 1871   2022.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.organomet.2c00171

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  6. Recent Advances in Light-Driven Carbon–Carbon Bond Formation via Carbon Dioxide Activation

    Jieun Jung, Susumu Saito

    Synthesis   Vol. 53 ( 18 ) page: 3263 - 3278   2021.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Georg Thieme Verlag KG  

    Abstract

    Carbon dioxide (CO2) is an attractive renewable one-carbon (C1) feedstock in terms of its earth abundance, low cost, and non-toxicity. Developing new catalytic systems to realize the practical insertion of CO2 into organic molecules has been of great importance for ecological economics. In recent years, outstanding improvements have been carried out in the field of light-driven catalytic carboxylation via the activation of CO2 as the key reagent. In this short review, the recent developments of light-promoted carboxylation utilizing CO2 to synthesize value-added chemicals using a dual visible-light photoredox/transition-metal catalyst or a photoredox catalyst are highlighted.

    1 Introduction

    2 Visible-Light-Driven Carboxylation Using Transition-Metal Photocatalysts

    2.1 Transition-Metal-Catalyzed Carboxylation of Alkenes

    2.2 Transition-Metal-Catalyzed Carboxylation of C(sp2)–X (X = Cl, Br, OTf) Bonds

    2.3 Transition-Metal-Catalyzed Carboxylation of Alkynes

    2.4 Transition-Metal-Catalyzed Carboxylation of Carbons Attached to Nitrogen

    3 Light-Driven Carboxylation via Organo-Photocatalysis

    3.1 Photocatalytic Carboxylation of Alkenes

    3.2 Photocatalytic Carboxylation of C(sp3)–H Bonds

    4 Conclusion

    DOI: 10.1055/a-1577-5947

    Web of Science

  7. Photocatalytic hydrogen evolution using a Ru(ii)-bound heteroaromatic ligand as a reactive site

    Takuya Sawaki, Tomoya Ishizuka, Nanase Namura, Dachao Hong, Mayuko Miyanishi, Yoshihito Shiota, Hiroaki Kotani, Kazunari Yoshizawa, Jieun Jung, Shunichi Fukuzumi, Takahiko Kojima

    DALTON TRANSACTIONS   Vol. 49 ( 47 ) page: 17230 - 17242   2020.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ROYAL SOC CHEMISTRY  

    A Ru-II complex, [Ru-II(tpphz)(bpy)(2)](2+) (1) (tpphz = tetrapyridophenazine, bpy = 2,2 '-bipyridine), whose tpphz ligand has a pyrazine moiety, is converted efficiently to [Ru-II(tpphz-HH)(bpy)(2)](2+) (2) having a dihydropyrazine moiety upon photoirradiation of a water-methanol mixed solvent solution of 1 in the presence of an electron donor. In this reaction, the triplet metal-to-ligand charge-transfer excited state ((MLCT)-M-3*) of 1 is firstly formed upon photoirradiation and the (MLCT)-M-3* state is reductively quenched with an electron donor to afford [Ru-II(tpphz(-))(bpy)(2)](+), which is converted to 2 without the observation of detectable reduced intermediates by nano-second laser flash photolysis. The inverse kinetic isotope effect (KIE) was observed to be 0.63 in the N-H bond formation of 2 at the dihydropyrazine moiety. White-light (380-670 nm) irradiation of a solution of 1 in a protic solvent, in the presence of an electron donor under an inert atmosphere, led to photocatalytic H-2 evolution and the hydrogenation of organic substrates. In the reactions, complex 2 is required to be excited to form its (MLCT)-M-3* state to react with a proton and aldehydes. In photocatalytic H-2 evolution, the H-H bond formation between photoexcited 2 and a proton is involved in the rate-determining step with normal KIE being 5.2 on H-2 evolving rates. Density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations on the reaction mechanism of H-2 evolution from the ground and photo-excited states of 2 were performed to have a better understanding of the photocatalytic processes.

    DOI: 10.1039/d0dt03546g

    Web of Science

  8. Development of Catalytic Reduction of Renewable Carbon Resources Using Well-Elaborated Organometallic Complexes with PNNP Tetradentate Ligands

    Shota Yoshioka, Jieun Jung, Susumu Saito

    Journal of Synthetic Organic Chemistry, Japan   Vol. 78 ( 9 ) page: 856 - 866   2020.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Society of Synthetic Organic Chemistry, Japan  

    DOI: 10.5059/yukigoseikyokaishi.78.856

  9. Development of Catalytic Reduction of Renewable Carbon Resources Using Well-Elaborated Organometallic Complexes with PNNP Tetradentate Ligands

    Yoshioka, S; Jung, J; Saito, S

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN   Vol. 78 ( 9 ) page: 856 - 866   2020.9

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    Language:English   Publishing type:Research paper (scientific journal)  

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  10. Photocatalytic CO2 Reduction Using a Robust Multifunctional Iridium Complex toward the Selective Formation of Formic Acid Reviewed

    Kenji Kamada, Jieun Jung, Taku Wakabayashi, Keita Sekizawa, Shunsuke Sato, Takeshi Morikawa, Shunichi Fukuzumi, Susumu Saito

    Journal of the American Chemical Society   Vol. 142 ( 23 ) page: 10261 - 10266   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/jacs.0c03097

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    PubMed

  11. Spatiotemporal control of amide radicals during photocatalysis

    Shogo Mori, Takahiro Aoki, Kaliyamoorthy Selvam, Shunichi Fukuzumi, Jieun Jung, and Susumu Saito

    ChemRxiv.     2020.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.26434/chemrxiv.12040146.v1

  12. PNNP四座配位子をもつ精密金属錯体触媒を用いる再生可能炭素資源の還元法の開発 Invited Reviewed

    有機合成化学協会誌   Vol. 78   page: 856 - 866   2020

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.5059/yukigoseikyokaishi.78.856

  13. Photocatalytic Oxygenation Reactions with a Cobalt Porphyrin Complex Using Water as an Oxygen Source and Dioxygen as an Oxidant International coauthorship

    Young Hyun Hong, Ji Won Han, Jieun Jung, Tatsuo Nakagawa, Yong-Min Lee, Wonwoo Nam, Shunichi Fukuzumi

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   Vol. 141 ( 23 ) page: 9155 - 9159   2019.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jacs.9b02864

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  14. Photodriven Oxidation of Water by Plastoquinone Analogs with a Nonheme Iron Catalyst International coauthorship

    Young Hyun Hong, Jieun Jung, Tatsuo Nakagawa, Namita Sharma, Yong-Min Lee, Wonwoo Nam*, and Shunichi Fukuzumi*

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   Vol. 141 ( 16 ) page: 6748 - 6754   2019.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jacs.9b02517

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  15. Long-Lived Photoexcited State of a Mn(IV)-Oxo Complex Binding Scandium Ions That is Capable of Hydroxylating Benzene Reviewed

    Namita Sharma, Jieun Jung, Kei Ohkubo, Yong-Min Lee, Mohamed E. El-Khouly, Wonwoo Nam, Shunichi Fukuzumi

    Journal of the American Chemical Society   Vol. 140 ( 27 ) page: 8405 - 8409   2018.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society ({ACS})  

    DOI: 10.1021/jacs.8b04904

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  16. Thermal and photocatalytic oxidation of organic substrates by dioxygen with water as an electron source Reviewed

    Shunichi Fukuzumi, Yong-Min Lee, Jieun Jung, Wonwoo Nam

    Green Chemistry   Vol. 20 ( 5 ) page: 948 - 963   2018.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry  

    The oxidation of organic substrates is of fundamental importance in nature and includes key transformations in organic synthesis and industry. Dioxygen (O2) is potentially the greenest oxidant because O2 is available in air and its reduction product is water, which is environmentally the most benign substance. However, the direct thermal oxidation of organic substrates with O2 is spin-forbidden because the spin state of ground-state O2 is triplet and the spin state of most organic substrates is singlet. Transition metal complexes can react with triplet O2 in the presence of an electron source to produce metal-oxygen intermediates, such as metal-oxo and metal-hydroperoxo complexes, that can oxidize substrates under mild conditions. Various thermal and photocatalytic mechanisms of the oxidation of organic substrates by O2 with transition metal complexes have been critically discussed by focusing on how metal-oxygen intermediates are produced in the presence of an electron source and then react with organic substrates. Metal-oxygen intermediates are more easily produced by the reactions of metal complexes with hydrogen peroxide (H2O2) and act as active catalysts for the oxidation of substrates by H2O2. The photocatalytic oxidation of water by O2 to produce H2O2 has been combined with the catalytic oxidation of organic substrates by H2O2 to achieve the photocatalytic oxidation of organic substrates by O2. The photocatalytic oxidation of organic substrates by O2 with the use of water as an electron source has also been made possible by the use of inorganic and organic photocatalysts, which can be combined with transition metal complexes as catalysts for thermal reaction steps.

    DOI: 10.1039/c7gc03387g

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    Scopus

  17. Bicyclic Baird-type aromaticity Reviewed

    Won-Young Cha, Taeyeon Kim, Arindam Ghosh, Zhan Zhang, Xian-Sheng Ke, Rashid Ali, Vincent M. Lynch, Jieun Jung, Woojae Kim, Sangsu Lee, Shunichi Fukuzumi, Jung Su Park, Jonathan L. Sessler, Tavarekere K. Chandrashekar, Dongho Kim

    NATURE CHEMISTRY   Vol. 9 ( 12 ) page: 1243 - 1248   2017.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:NATURE PUBLISHING GROUP  

    Classic formulations of aromaticity have long been associated with topologically planar conjugated macrocyclic systems. The theoretical possibility of so-called bicycloaromaticity was noted early on. However, it has yet to be demonstrated by experiment in a simple synthetic organic molecule. Conjugated organic systems are attractive for studying the effect of structure on electronic features. This is because, in principle, they can be modified readily through dedicated synthesis. As such, they can provide useful frameworks for testing by experiment with fundamental insights provided by theory. Here we detail the synthesis and characterization of two purely organic non-planar dithienothiophene-bridged [ 34] octaphyrins that permit access to two different aromatic forms as a function of the oxidation state. In their neutral forms, these congeneric systems contain competing 26 and 34 pi-electronic circuits. When subject to two-electron oxidation, electronically mixed [4n+1]/[4n+1] triplet biradical species in the ground state are obtained that display global aromaticity in accord with Baird's rule.

    DOI: 10.1038/NCHEM.2834

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  18. Photocatalytic oxidation of benzene to phenol using dioxygen as an oxygen source and water as an electron source in the presence of a cobalt catalyst Reviewed

    Han Ji Won, Jung Jieun, Lee Yong-Min, Nam Wonwoo, Fukuzumi Shunichi

    CHEMICAL SCIENCE   Vol. 8 ( 10 ) page: 7119-7125   2017.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c7sc02495a

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  19. Multi-Electron Oxidation of Anthracene Derivatives by Nonheme Manganese(IV)-Oxo Complexes Reviewed

    Namita Sharma, Jieun Jung, Yong-Min Lee, Mi Sook Seo, Wonwoo Nam, Shunichi Fukuzumi

    CHEMISTRY-A EUROPEAN JOURNAL   Vol. 23 ( 29 ) page: 7125 - 7131   2017.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY-V C H VERLAG GMBH  

    Six-electron oxidation of anthracene to anthraqui-none by a nonheme Mn-IV-oxo complex, [(Bn-TPEN)Mn-IV(O)] (2+), proceeds through a rate-determining electron transfer from anthracene to [(Bn-TPEN) Mn-IV(O)](2+), followed by subsequent fast oxidation reactions to give anthraquinone. The reduced Mn-II complex ([(Bn-TPEN) Mn-II](2+)) is oxidized by [(Bn-TPEN)Mn-IV(O)](2+) rapidly to produce the mu-oxo dimer ([(Bn-TPEN)Mn-III- O-Mn-III(Bn-TPEN)](4+)). The oxygen atoms of the anthraquinone product were found to derive from the manganese-oxo species by the O-18-labelling experiments. In the presence of Sc3+ ion, formation of an anthracene radical cation was directly detected in the electron transfer from anthracene to a Sc3+ ion-bound Mn-IV(O) complex, [(Bn-TPEN)Mn-IV( O)-(Sc(OTf)(3))(2)](2+), followed by subsequent further oxidation to yield anthraquinone. When anthracene was replaced by 9,10-dimethylanthracene, electron transfer from 9,10-dimethylanthracene to [(Bn-TPEN) Mn-IV(O)-(Sc(OTf)(3))(2)](2+) occurred rapidly to produce stable 9,10-dimethylanthracene radical cation. The driving force dependence of the rate constants of electron transfer from the anthracene derivatives to [(Bn-TPEN) Mn-IV(O)](2+) and [(Bn-TPEN) Mn-IV(O)-(Sc(OTf)(3))(2)](2+) was well-evaluated in light of the Marcus theory of electron transfer.

    DOI: 10.1002/chem.201700666

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  20. Effects of Lewis Acids on Photoredox Catalysis Reviewed

    Shunichi Fukuzumi, Jieun Jung, Yong-Min Lee, Wonwoo Nam

    ASIAN JOURNAL OF ORGANIC CHEMISTRY   Vol. 6 ( 4 ) page: 397 - 409   2017.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY-V C H VERLAG GMBH  

    The reactivity of organic photoredox catalysts in oxidation reactions is enhanced by the addition of Lewis acids, which bind to the catalyst to increase its oxidizing ability. Redox-inactive metal ions, such as Sc3+, also act as Lewis acids and can bind to flavins to increase their one-electron reduction potentials and photocatalytic stability. The Sc3+ ion can bind to acridine and pyrene to enhance their photoredox catalytic activity in the oxidation of substrates by dioxygen. The binding of Lewis acids to radical anions enhances their overall photocatalytic activity by prohibiting a back electron transfer from the radical anions of substrates to the oxidized photocatalysts. The photocatalytic asymmetric oxidation of terminal olefins by using water as the oxygen source with a mononuclear nonheme chiral manganese complex has been made possible by the addition of acetic acid, which is essential to afford the products with high enantioselectivity.

    DOI: 10.1002/ajoc.201600576

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  21. A Chromium(III)-Superoxo Complex as a Three-Electron Oxidant with a Large Tunneling Effect in Multi-Electron Oxidation of NADH Analogues Reviewed International coauthorship

    Tarali Devi, Yong-Min Lee, Jieun Jung, Muniyandi Sankaralingam, Wonwoo Nam, Shunichi Fukuzumi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   Vol. 56 ( 13 ) page: 3510 - 3515   2017.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:WILEY-V C H VERLAG GMBH  

    Metal-superoxo species are involved in a variety of enzymatic oxidation reactions, and multi-electron oxidation of substrates is frequently observed in those enzymatic reactions. ACr(III)-superoxo complex, [Cr-III(O-2)(TMC)(Cl)](+) (1; TMC=1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane), is described that acts as a novel three-electron oxidant in the oxidation of dihydronicotinamide adenine dinucleotide (NADH) analogues. In the reactions of 1 with NADH analogues, a Cr-IV-oxo complex, [Cr-IV(O)(TMC)(Cl)](+) (2), is formed by a heterolytic O-O bond cleavage of a putative Cr-II-hydroperoxo complex, [Cr-II(OOH)(TMC)(Cl)], which is generated by hydride transfer from NADH analogues to 1. The comparison of the reactivity of NADH analogues with 1 and p-chloranil (Cl(4)Q) indicates that oxidation of NADH analogues by 1 proceeds by proton-coupled electron transfer with a very large tunneling effect (for example, with a kinetic isotope effect of 470 at 233 K), followed by rapid electron transfer.

    DOI: 10.1002/ange.201611709

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  22. Switchover of the Mechanism between Electron Transfer and Hydrogen-Atom Transfer for a Protonated Manganese(IV)-Oxo Complex by Changing Only the Reaction Temperature Reviewed

    Jung Jieun, Kim Surin, Lee Yong-Min, Nam Wonwoo, Fukuzumi Shunichi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   Vol. 55 ( 26 ) page: 7450-7454   2016.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/anie.201602460

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  23. Homogeneous and Heterogeneous Photocatalytic Water Oxidation by Persulfate Reviewed

    Fukuzumi Shunichi, Jung Jieun, Yamada Yusuke, Kojima Takahiko, Nam Wonwoo

    CHEMISTRY-AN ASIAN JOURNAL   Vol. 11 ( 8 ) page: 1138-1150   2016.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/asia.201501329

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  24. Photocatalytic Oxygenation of Substrates by Dioxygen with Protonated Manganese(III) Corrolazine Reviewed

    Jung Jieun, Neu Heather M., Leeladee Pannee, Siegler Maxime A., Ohkubo Kei, Goldberg David P., Fukuzumi Shunichi

    INORGANIC CHEMISTRY   Vol. 55 ( 7 ) page: 3218-3228   2016.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.inorgchem.5b02019

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  25. Enhanced Electron Transfer Reactivity of a Nonheme Iron(IV)-Imido Complex as Compared to the Iron(IV)-Oxo Analogue Reviewed

    Vardhaman Anil Kumar, Lee Yong-Min, Jung Jieun, Ohkubo Kei, Nam Wonwoo, Fukuzumi Shunichi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   Vol. 55 ( 11 ) page: 3709-3713   2016.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/anie.201600287

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  26. Activationless Electron Self-Exchange of High-Valent Oxo and Imido Complexes of Chromium Corroles Reviewed

    Liu Shuo, Jung Jieun, Ohkubo Kei, Hicks Scott D., Bougher Curt J., Abu-Omar Mandi M., Fukuzumi Shunichi

    INORGANIC CHEMISTRY   Vol. 54 ( 18 ) page: 9223-9228   2015.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.inorgchem.5b01777

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  27. Catalytic Two-Electron Reduction of Dioxygen by Ferrocene Derivatives with Manganese(V) Corroles Reviewed

    Jung Jieun, Liu Shuo, Ohkubo Kei, Abu-Omar Mahdi M., Fukuzumi Shunichi

    INORGANIC CHEMISTRY   Vol. 54 ( 9 ) page: 4285-4291   2015.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/ic5030125

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  28. Light-Driven, Proton-Controlled, Catalytic Aerobic C-H Oxidation Mediated by a Mn(III) Porphyrinoid Complex Reviewed

    Neu Heather M., Jung Jieun, Baglia Regina A., Siegler Maxime A., Ohkubo Kei, Fukuzumi Shunichi, Goldberg David P.

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   Vol. 137 ( 14 ) page: 4614-4617   2015.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jacs.5b00816

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  29. Photocatalytic Oxygenation of 10-Methyl-9,10-dihydroacridine by O-2 with Manganese Porphyrins Reviewed

    Jung Jieun, Ohkubo Kei, Godberg David P., Fukuzumi Shunichi

    JOURNAL OF PHYSICAL CHEMISTRY A   Vol. 118 ( 32 ) page: 6223-6229   2014.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jp505860f

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  30. Photochemical Oxidation of a Manganese(III) Complex with Oxygen and Toluene Derivatives to Form a Manganese(V)-Oxo Complex Reviewed

    Jung Jieun, Ohkubo Kei, Prokop-Prigge Katharine A., Neu Heather M., Goldberg David P., Fukuzumi Shunichi

    INORGANIC CHEMISTRY   Vol. 52 ( 23 ) page: 13594-13604   2013.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/ic402121j

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  31. Production of hydrogen peroxide as a sustainable solar fuel from water and dioxygen Reviewed

    Kato Satoshi, Jung Jieun, Suenobu Tomoyoshi, Fukuzumi Shunichi

    ENERGY & ENVIRONMENTAL SCIENCE   Vol. 6 ( 12 ) page: 3756-3764   2013.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c3ee42815j

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  32. Water-soluble mononuclear cobalt complexes with organic ligands acting as precatalysts for efficient photocatalytic water oxidation Reviewed

    Hong Dachao, Jung Jieun, Park Jiyun, Yamada Yusuke, Suenobu Tomoyoshi, Lee Yong-Min, Nam Wonwoo, Fukuzumi Shunichi

    ENERGY & ENVIRONMENTAL SCIENCE   Vol. 5 ( 6 ) page: 7606-7616   2012.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c2ee21185h

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Presentations 17

  1. Photocatalytic CO2 reduction using an iridium complex with PNNP-type tetradentate ligand

    Jieun Jung, Kenji Kamada, Manami Muraki, Keita Sekizawa, Shunsuke Sato, Takeshi Morikawa, Shunichi Fukuzumi, Susumu Saito

    2018.6.15 

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    Event date: 2018.6

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  2. Photocatalytic oxidation of benzene to phenol using dioxygen and water

    Jung Jieun, Han Ji Won, Lee Yong-Min, Nam Wonwoo, Fukuzumi Shunichi

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    Event date: 2017.10

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  3. Photocatalytic oxidation of benzene to phenol by dioxygen with water as an electron source Invited International conference

    Jung Jieun, Han Ji Won, Lee Yong-Min, Nam Wonwoo, Fukuzumi Shunichi

    The 13th Korea-Japan Symposium on Frontier Photoscience 

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    Event date: 2017.10

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  4. Photocatalytic oxidation of benzene to phenol using dioxygen as an oxygen source and water as an electron source in the presence of a cobalt catalyst

    Jung Jieun, Han Ji Won, Lee Yong-Min, Nam Wonwoo, Fukuzumi Shunichi

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    Event date: 2017.7

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  5. Catalytic two-electron reduction of dioxygen with manganese corrole complexes

    JUNG Jieun, OHKUBO Kei, LIU Shuo, ABU-OMAR Mahdi M., FUKUZUMI Shunichi

    Annual Meeting of the Chemical Society of Japan  

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    Event date: 2015.3

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  6. Catalytic two-electron reduction of dioxygen by ferrocene derivatives with manganese(V) corrole International conference

    Jung Jieun, Ohkubo Kei, Liu Shuo, Abu-Omar Mahdi M., Fukuzumi Shunichi

    The 8th International Conference on Porphyrins and Phthalocyanines  

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    Event date: 2014.6

    Language:English   Presentation type:Poster presentation  

  7. Enhanced photocatalytic reactivity of manganese(III) corrolazine for oxygenation of toluene derivatives with dioxygen in the presence of an acid

    JUNG Jieun, OHKUBO Kei, NEU Heather M., GOLDBERG David P., FUKUZUMI Shunichi

    Annual Meeting of the Chemical Society of Japan  

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    Event date: 2014.3

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  8. Photocatalytic oxygenation of 10-methyl-9,10-dihydroacridine by O2 with a manganese porphyrin

    JUNG Jieun, OHKUBO Kei, FUKUZUMI Shunichi

    The 46th Oxidation Reaction Conference  

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    Event date: 2013.11

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  9. Photocatalytic oxidation of toluene derivatives with manganese(III) corrolazine in the presence of an acid International conference

    Jung Jieun, Ohkubo Kei, Neu Heather M., Goldberg David P., Fukuzumi Shunichi

    The 4th Asian Conference on Coordination Chemistry  

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    Event date: 2013.11

    Language:English   Presentation type:Poster presentation  

    Country:Korea, Republic of  

  10. Photocatalytic oxidation of toluene derivatives with manganese(III) corrolazine in the presence of an acid

    JUNG Jieun, OHKUBO Kei, NEU Heather M., GOLDBERG David P., FUKUZUMI Shunichi

    The Japanese Photochemistry Association  

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    Event date: 2013.9

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  11. Photochemical oxidation of a manganese(III) complex with oxygen and toluene derivatives to form the manganese(V)-oxo complex

    Jung Jieun, Ohkubo Kei, Prokop-Prigge Katharine A., Goldberg David P., Fukuzumi Shunichi

    The 25th Coordination Photochemistry  

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    Event date: 2013.8

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  12. Photochemical oxidation of a manganese(III) complex with oxygen and toluene derivatives to form the manganese(V)-oxo complex International conference

    Jung Jieun, Ohkubo Kei, Prokop-Prigge Katharine A., Goldberg David P., Fukuzumi Shunichi

    The 16th International Conference on BioInorganic Chemistry  

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    Event date: 2013.7

    Language:English   Presentation type:Poster presentation  

    Country:France  

  13. Photochemical oxidation of a manganese(III) complex with oxygen and toluene derivatives to form the manganese(V)-oxo complex

    Jung Jieun, Ohkubo Kei, Prokop-Prigge Katharine A., Goldberg David P., Fukuzumi Shunichi

    The 34th Photochemistry Association for Young Scientist  

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    Event date: 2013.6

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  14. Photocatalytic oxygenation of 10-methyl-9,10-dihydroacridine by O2 with a manganese porphyrin

    Jung Jieun, Ohkubo Kei, Shunichi Fukuzumi

    Annual Meeting of the Chemical Society of Japan 

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    Event date: 2013.3

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  15. Mechanism of formation of a Mn(V)-oxo complex by photochemical oxidation of a Mn(III) corrolazine complex with O2 and toluene derivatives

    Jung Jieun, Ohkubo Kei, Prokop-Prigge Katharine A., Goldberg David P., Fukuzumi Shunichi

    The Japanese Photochemistry Association  

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    Event date: 2012.9

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  16. Selective Generation of Hydrogen Peroxide in Photocatalytic Reduction of Dioxygen by Water as an Electron Donor with an Organocobalt Complex

    JUNG Jieun, KATO Satoshi, SUENOBU Tomoyoshi, FUKUZUMI Shunichi

    Annual Meeting of the Chemical Society of Japan  

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    Event date: 2012.3

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  17. Water Oxidation Catalyzed by Organocobalt Complexes under Visible Light Irradiation

    Jung Jieun, Park Jiyun, Hong Dachao, Suenobu Tomoyoshi, Lee Yong-Min, Cho Jeajeung, Nam Wonwoo, Fukuzumi Shunichi

    The 61th Japan Society of Coordination  

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    Event date: 2011.9

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

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KAKENHI (Grants-in-Aid for Scientific Research) 3

  1. Development of novel organic synthesis via one-electron transfer from H2 or H2O

    Grant number:23H04904  2023.4 - 2028.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Transformative Research Areas (A)

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    Authorship:Coinvestigator(s) 

  2. Development of a non-noble metal complex as a molecular photocatalyst for photocatalytic carbon dioxide reduction

    Grant number:21K14642  2021.4 - 2023.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Early-Career Scientists

    Jung Jieun

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    Authorship:Principal investigator 

    Grant amount:\4550000 ( Direct Cost: \3500000 、 Indirect Cost:\1050000 )

    Structurally robust, new (PNNP)M (M = Ir, Mo, W, Cr, Mn) complexes were synthesized, and used for photoinduced reduction of carbon dioxide (CO2) under light. The main purpose of this research is to discover non-noble photocatalysts for CO2 reduction by switching the metal center from Ir to a non-noble metal complex and electronic and steric modification of the ligand. Photocatalytic CO2 reduction using a (PNNP)Mo complex continuously gave us formic acid as the main product, reaching the turnover number (TON) of > 440 at 160 h.
    A variety of (PNNP)M metal complexes were synthesized by modifying the ligands of the metal complexes, and exploited to catalyze electrocatalytic CO2 reduction in an aqueous solution through heterogenization of the catalyst onto the surface of a carbon paper. The heterogenized molecular complex exhibited outstanding CO2 reduction activity to give formate as the main product with a high Faradaic efficiency of ~86% at a very small overpotential of around 90 mV.

  3. Development of a system for hydrogen addition to carbon dioxide and organic substrates under mild conditions using photocatalytic water oxidation

    Grant number:18K14241  2018.4 - 2020.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Early-Career Scientists

    Jung Jieun

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    Authorship:Principal investigator 

    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

    Structurally robust, new (PNNP)M complexes were synthesized, and used for photoinduced reduction of CO2 under light. The key aspects for the design of the catalysts are (i) the introduction of a bulky PNNP ligand, which has been shown to prevent catalyst deterioration and promote efficient hydrogenation, and (ii) the incorporation of bipyridyl CH2P groups, which could potentially act as proton donors.
    Photocatalytic CO2 reduction using a (PNNP)Ir complex continuously gave us formic acid for over 1 week, indicating the Ir complex ligated PNNP ligand is robust enough for the photocatalytic reaction. A variety of new (PNNP)M base metal complexes (M = Mo, Mn, Co, Fe) and (PNNP)M noble metal complexes (M = Ru, Os) were successfully synthesized by modifying the ligands of the metal complexes. The present study has thus provided new insights into the development of efficient catalysts for CO2 reduction reactions and a system for photoinduced CO2 reduction using water to mimic photosynthesis.