Faculty Profiles - TANAKA Kentaro

Papers - TANAKA Kentaro

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Synthesis of Bis{meso-Tetrakis(4-N-alkylpyridiniumyl)porphyrinato}cerium and Its Redox Switching Behavior Invited Reviewed International journal

Toshio Nishino, Yasuyuki Yamada, Ayumi Yamamoto, Kentaro Tanaka

Molecules Vol. 26 ( 4 ) page： 790 - 790 2021.2

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI AG

A novel double-decker porphyrin complex, bis{meso-tetrakis(4-N-alkylpyridiniumyl)porphyrinato}cerium, was prepared. Electrochemical measurements revealed that this complex exhibited reversible redox waves corresponding to a 1e– redox reaction of the cerium center. Treating the complex alternately with an oxidant and a reductant resulted in the reversible redox switching between the oxidized and reduced states in an organic solvent.

DOI： 10.3390/molecules26040790

High catalytic methane oxidation activity of monocationic μ-nitrido-bridged iron phthalocyanine dimer with sixteen methyl groups Reviewed International journal

Yasuyuki Yamada, Jyunichi Kura, Yuka Toyoda, Kentaro Tanaka

Dalton Transactions Vol. 50 ( 19 ) page： 6718 - 6724 2021

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Royal Society of Chemistry (RSC)

<p>High catalytic methane oxidation activity of a μ-nitrido-bridged iron phthalocyanine dimer was achieved by introducing 16 electron-donating methyl groups onto the phthalocyanine rings.</p>

DOI： 10.1039/d1dt00941a

Synthesis of a monocationic μ-nitrido-bridged iron porphycene dimer and its methane oxidation activity Reviewed

Yasuyuki Yamada, Yusuke Miwa, Yuka Toyoda, Tomoo Yamaguchi, Shigehisa Akine, Kentaro Tanaka

Dalton Transactions Vol. 50 ( 45 ) page： 16775 - 16781 2021

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Royal Society of Chemistry (RSC)

Herein, we synthesized a monocationic μ-nitrido-bridged iron porphycene dimer, a structural analogue of a monocationic μ-nitrido-bridged iron phthalocyanine dimer, which is known as one of the most potent molecule-based catalysts for methane oxidation.

DOI： 10.1039/d1dt02922c

Structure and dynamics of a chiral cubanoid complex composed of lithium and salphen Reviewed International journal

Shin-ichiro Kawano, Kyohei Tomita, Kentaro Tanaka

Inorganica Chimica Acta Vol. 512 page： 119894 - 119894 2020.11

Development of functional molecular assemblies based on programmable construction of face-to-face assemblies of metallo-porphyrinoids Invited Reviewed International journal

Yasuyuki Yamada, Kentaro Tanaka

Journal of Inclusion Phenomena and Macrocyclic Chemistry Vol. 96 ( 3-4 ) page： 197 - 213 2020.4

μ-Nitrido-bridged iron phthalocyanine dimer bearing eight peripheral 12-crown-4 units and its methane oxidation activity Reviewed International journal

Yasuyuki Yamada, Jyunichi Kura, Yuka Toyoda, Kentaro Tanaka

New Journal of Chemistry Vol. 44 ( 44 ) page： 19179 - 19183 2020

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Royal Society of Chemistry (RSC)

<p>A novel μ-nitrido-bridged iron phthalocyanine dimer with eight peripheral 12-crown-4 units was synthesized and its methane oxidation activity was investigated.</p>

DOI： 10.1039/d0nj04601a

Liquid-crystalline Metallomacrocycles Composed of Bis(hydroxypyridono)toluene Ligand and Cu2+ Ions. Reviewed International journal

Shin-Ichiro Kawano, Kohei Ideta, Tomohiko Banno, Kentaro Tanaka

Chemistry, an Asian journal Vol. 14 ( 23 ) page： 4415 - 4419 2019.12

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

A series of π-extended chelating scaffolds incorporating two hydroxypyridone moieties were synthesized. X-ray crystallographic analysis revealed that a bis(hydroxypyridono)toluene ligand possessed a unique π-extended structure and exhibited efficient phase segregation from the aliphatic chains attached at the heterocyclic nitrogen. The bis-bidentate ligand formed a metal-coordination-induced macrocycle with Cu2+ ions. During the complexation, a spectral change in the visible region was induced. Furthermore, the successful development of a liquid crystal of the metallomacrocycle with appropriate side chains was achieved. Examples of liquid-crystalline macrocycles formed via metal-mediated self-assembly are still rare. Among them, the macrocycle described in this paper showed an obvious hexagonal columnar phase reflecting the three-fold symmetric planar structure of the mesogenic metal complex.

DOI： 10.1002/asia.201901323

PubMed

Catalytic methane oxidation by a supramolecular conjugate based on a mu-nitrido-bridged iron porphyrinoid dimer Reviewed International journal

Yamada, Yasuyuki, Morita, Kentaro, Mihara, Nozomi, Igawa, Kazunobu, Tomooka, Katsuhiko, Tanaka, Kentaro

NEW JOURNAL OF CHEMISTRY Vol. 43 ( 29 ) page： 11477 - 11482 2019.8

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：ROYAL SOC CHEMISTRY

Catalytic methane oxidation was conducted using a mu-nitrido-bridged dinuclear iron complex of a fourfold rotaxane heterodimer of a porphyrin and a phthalocyanine. Extension of the mu-stacked structure of the four-fold rotaxane-based mu-nitrido-bridged iron porphyrinoid dimer by supramolecular complexation with an additional tetraanionic porphyrin apparently increased the methane conversion ability.

DOI： 10.1039/c9nj02210d

Web of Science

Improved synthesis of monocationic mu-nitrido-bridged iron phthalocyanine dimer with no peripheral substituents Reviewed International journal

Yamada Yasuyuki, Sugiura Takuya, Morita Kentaro, Ariga-Miwa Hiroko, Tanaka Kentaro

INORGANICA CHIMICA ACTA Vol. 489 page： 160 - 163 2019.4

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE SA

mu-Nitrido-bridged iron phthalocyanine dimers have attracted considerable attention because of their catalytic ability in alkane oxidation. However, clear and practical synthetic procedures for the simplest mu-nitrido-bridged iron phthalocyanine dimer with no peripheral substituents have not been reported because of its low solubility. In this study, we report improved synthesis and spectroscopic identification of the monocationic species of mu-nitrido-bridged iron phthalocyanine dimers that has no peripheral substituent groups. We observed that the use of iodine as an oxidant for the mu-nitrido-bridged iron phthalocyanine dimer prevents over-oxidation. Pyridine can dissolve its 1e(-)-oxidized monocationic species, which was characterized by H-1 NMR, C-13 NMR, IR, and UV spectroscopy as well as cyclic voltammetry.

DOI： 10.1016/j.ica.2019.02.021

Web of Science

Near-infrared absorption by intramolecular charge-transfer transition in 5,10,15,20-tetra(N-carbazolyl)porphyrin through protonation Reviewed International journal

Kawano Shin-ichiro, Kawada Sae, Kitagawa Yasutaka, Teramoto Rena, Nakano Masayoshi, Tanaka Kentaro

CHEMICAL COMMUNICATIONS Vol. 55 ( 20 ) page： 2992 - 2995 2019.3

Site-Selective Supramolecular Complexation Activates Catalytic Ethane Oxidation by a Nitrido-Bridged Iron Porphyrinoid Dimer Reviewed International journal

Nozomi Mihara, Yasuyuki Yamada, Hikaru Takaya, Yasutaka Kitagawa, Kazunobu Igawa, Katsuhiko Tomooka, Hiroshi Fujii, Kentaro Tanaka

Chemistry - A European Journal Vol. 25 ( 13 ) page： 3369 - 3375 2019.3

Authorship：Last author,　Corresponding author Language：English Publishing type：Research paper (scientific journal)

© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Development of supramolecular methods to further activate a highly reactive intermediate is a fascinating strategy to create novel potent catalysts for activation of inert chemicals. Herein, a supramolecular approach to enhance the oxidizing ability of a high-valent oxo species of a nitrido-bridged iron porphyrinoid dimer that is a known potent molecular catalyst for light alkane oxidation is reported. For this purpose, a nitrido-bridged dinuclear iron complex of porphyrin-phthalocyanine heterodimer 3 5+ , which is connected through a fourfold rotaxane, was prepared. Heterodimer 3 5+ catalyzed ethane oxidation in the presence of H 2 O 2 at a relatively low temperature. The site-selective complexation of 3 5+ with an additional anionic porphyrin (TPPS 4− ) through π–π stacking and electrostatic interactions afforded a stable 1:1 complex. It was demonstrated that the supramolecular post-synthetic modification of 3 5+ enhances its catalytic activity efficiently. Moreover, supramolecular conjugates achieved higher catalytic ethane oxidation activity than nitrido-bridged iron phthalocyanine dimer, which is the most potent iron-oxo-based molecular catalyst for light-alkane oxidation reported so far. Electrochemical measurements proved that the electronic perturbation from TPPS 4− to 3 5+ enhanced the catalytic activity.

DOI： 10.1002/chem.201805580

Web of Science

Scopus

PubMed

Specific and Oriented Encapsulation of Fullerene C70 into a Supramolecular Double-Decker Cage Composed of Shape-Persistent Macrocycles Reviewed International journal

Kawano Shin-ichiro, Fukushima Tomoaki, Tanaka Kentaro

ANGEWNDTE CHEMIE-INTERNATIONAL EDITION Vol. 57 ( 45 ) page： 14827 - 14831 2018.11

Liquid-crystalline Phthalocyanine with Short Intercolumnar Distance and Variation of the Liquid Crystallinity Induced by Square-planar Metal Ions Reviewed International journal

Kawano Shin-ichiro, Yamada Yasuyuki, Shu Rongfang, Ishihara Yu, Tanaka Kentaro

CHEMISTRY LETTERS Vol. 47 ( 10 ) page： 1262 - 1264 2018.10

Programmable arrangement of metal ions in a cofacially stacked assembly of porphyrinoids toward molecular tags Reviewed

Mihara Nozomi, Yamada Yasuyuki, Furukawa Ko, Kato Tatsuhisa, Tanaka Kentaro

DALTON TRANSACTIONS Vol. 47 ( 20 ) page： 7044-7049 2018.5

Columnar Liquid-Crystalline Macrocycles Synthesized via Metal Ion-Assisted Self-Assembly Reviewed

Kawano Shin-ichiro, Murai Takafumi, Harada Takahiro, Tanaka Kentaro

INORGANIC CHEMISTRY Vol. 57 ( 7 ) page： 3913-3919 2018.4

Columnar Liquid Crystals from a Giant Macrocycle Mesogen Reviewed

Kawano Shin-ichiro, Kato Masahiro, Soumiya Shinya, Nakaya Masato, Onoe Jun, Tanaka Kentaro

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION Vol. 57 ( 1 ) page： 167-171 2018.1

Intramolecular strong electronic coupling in a discretely H-aggregated phthalocyanine dimer connected with a rigid linker

Yasuyuki Yamada, Yasuyuki Yamada, Yasuyuki Yamada, Katsuhiko Nawate, Tomoaki Maeno, Kentaro Tanaka

Chemical Communications Vol. 54 page： 8226-8228 2018.1

Publishing type：Research paper (scientific journal)

© 2018 The Royal Society of Chemistry. Preparation of an accurate assembly of phthalocyanines is rather difficult because of the high aggregation property of phthalocyanines. In this study, a novel discrete phthalocyanine dimer was prepared in which the relative configuration of each component was tightly and accurately fixed in an H-aggregate form by a rigid U-shaped linker. Electrochemical measurements showed that there were strong intramolecular electronic interactions between the two phthalocyanines.

DOI： 10.1039/c8cc04335c

Scopus

Dynamic Molecular Invasion into a Multiply Interlocked Catenane Reviewed

Yamada Yasuyuki, Itoh Ryohei, Ogino Sayaka, Kato Tatsuhisa, Tanaka Kentaro

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION Vol. 56 ( 45 ) page： 14124-14129 2017.11

Electronic perturbation of supramolecular conjugates of porphyrins and phthalocyanines Reviewed

Mihara Nozomi, Yamada Yasuyuki, Akine Shigehisa, Sugimoto Kunihisa, Tanaka Kentaro

CHEMICAL COMMUNICATIONS Vol. 53 ( 14 ) page： 2230-2232 2017.2

Programmable Arrangement of Heterometal Ions in a Supramolecular Array of Porphyrin and Phthalocyanine Reviewed

Nozomi Mihara, Yasuyuki Yamada, and Kentaro Tanaka

Bull. Chem. Soc. Jpn. Vol. 90 page： 427-435 2017

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Papers - TANAKA Kentaro