研究者詳細 - 忍久保　洋

論文 - 忍久保　洋

分割表示 403 件中 121 - 140 件目／全件表示 >>

Direct amination of the antiaromatic Ni-II norcorrole 査読有り

Yoshida Takuya, Shinokubo Hiroshi

MATERIALS CHEMISTRY FRONTIERS 1 巻 ( 9 ) 頁： 1853 - 1857 2017年9月

Selective alpha-arylation of alpha,beta-unsaturated imides mediated by a visible light photoredox catalyst

Ando Yuki, Kamatsuka Takuto, Shinokubo Hiroshi, Miyake Yoshihiro

CHEMICAL COMMUNICATIONS 53 巻 ( 65 ) 頁： 9136-9138 2017年8月

Highly-conducting molecular circuits based on antiaromaticity 査読有り

Fujii Shintaro, Marques-Gonzalez Santiago, Shin Ji-Young, Shinokubo Hiroshi, Masuda Takuya, Nishino Tomoaki, Arasu Narendra P., Vazquez Hector, Kiguchi Manabu

NATURE COMMUNICATIONS 8 巻 2017年7月

Synthesis, Properties, and Reactivities of Ruthenium(II) Carbonyl 5,15-Diazaporphyrins 査読有り

Nishimura Tsubasa, Miyake Yoshihiro, Shinokubo Hiroshi

CHEMISTRY LETTERS 46 巻 ( 7 ) 頁： 995 - 997 2017年7月

NIR mechanochromic behaviours of a tetracyanoethylene-bridged hexa-peri-hexabenzocoronene dimer and trimer through dissociation of C-C bonds 査読有り

Oda Kazuma, Hiroto Satoru, Shinokubo Hiroshi

JOURNAL OF MATERIALS CHEMISTRY C 5 巻 ( 22 ) 頁： 5310 - 5315 2017年6月

NIR mechanochromic behaviours of a tetracyanoethylene-bridged hexa-peri-hexabenzocoronene dimer and trimer through dissociation of C–C bonds 査読有り国際誌

Oda Kazuma, Hiroto Satoru, Shinokubo Hiroshi

Journal of Materials Chemistry C 5 巻 ( 22 ) 頁： 5310 - 5315 2017年6月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Oxidation of dicyanomethyl-substituted hexa-peri-hexabenzocoronenes (HBCs) furnished a tetracyanoethylene-bridged HBC dimer and trimer. The solid state structures of the oligomers were elucidated using single crystal X-ray diffraction analysis. In the solution state, these HBC oligomers exhibited conformational isomerism, depending on solvents and temperatures. Moreover, solid samples of the HBC dimer and trimer exhibited mechanochromism, showing near IR absorption upon grinding through generation of radical species. The formed radical was stable for 4 months, indicating the persistent nature of the radical species. These NIR mechanochromic behaviours of the HBC oligomers were originated from the reversible C–C bond dissociation and formation of a tetracyanoethylene linkage between the HBC units.

CiNii Research

10-Silacorroles Exhibiting Near-Infrared Absorption and Emission

Omori Hiroto, Hiroto Satoru, Shinokubo Hiroshi

CHEMISTRY-A EUROPEAN JOURNAL 23 巻 ( 33 ) 頁： 7866-7870 2017年6月

10-Silacorroles Exhibiting NIR Absorption and Emission 査読有り国際誌

Omori Hiroto, Hiroto Satoru, Shinokubo Hiroshi

CHEMISTRY-A EUROPEAN JOURNAL 22 巻 ( 33 ) 頁： 7866 - 7870 2017年6月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

10-Silacorroles were obtained from the Pd-catalyzed silylative cyclization of a bis(α,α′-dibromodipyrrin) Ni^II precursor with dihydrosilanes. These 10-silacorroles show substantially red-shifted absorption bands relative to those of normal porphyrins and isocorroles. Notably, the corresponding free base and Zn^II 10-silacorroles exhibit emissions in the NIR region. Theoretical calculations on these 10-silacorroles revealed the presence of σ*–π* conjugation between the silyl group and the tetrapyrrole π system, which significantly lowers their LUMO energy levels.

CiNii Research

Synthesis of Tetrasilatetrathia[8]circulenes by a Fourfold Intramolecular Dehydrogenative Silylation of C-H Bonds 査読有り

Serizawa Yuma, Akahori Shuhei, Kato Shohei, Sakai Hayato, Hasobe Taku, Miyake Yoshihiro, Shinokubo Hiroshi

CHEMISTRY-A EUROPEAN JOURNAL 23 巻 ( 29 ) 頁： 6948 - 6952 2017年5月

Synthesis of Tetraaza[8]circulenes from Tetrathia[8]circulenes through an SNAr-Based Process 査読有り

Nagata Yuya, Kato Shohei, Miyake Yoshihiro, Shinokubo Hiroshi

ORGANIC LETTERS 19 巻 ( 10 ) 頁： 2718 - 2721 2017年5月

Synthesis of a figure-eight azahelicene dimer with high emission and CPL properties

Ushiyama Ayako, Hiroto Satoru, Yuasa Junpei, Kawai Tsuyoshi, Shinokubo Hiroshi

ORGANIC CHEMISTRY FRONTIERS 4 巻 ( 5 ) 頁： 664-667 2017年5月

Synthesis and Functionalization of Porphyrins through Organometallic Methodologies 招待有り査読有り

Hiroto Satoru, Miyake Yoshihiro, Shinokubo Hiroshi

CHEMICAL REVIEWS 117 巻 ( 4 ) 頁： 2910 - 3043 2017年2月

Synthesis of bright red-emissive dicyanoetheno-bridged hexa-peri-hexabenzocoronene dimers 査読有り

Oda Kazuma, Hiroto Satoru, Hisaki Ichiro, Shinokubo Hiroshi

ORGANIC & BIOMOLECULAR CHEMISTRY 15 巻 ( 6 ) 頁： 1426 - 1434 2017年2月

Enhancing the low-energy absorption band and charge mobility of antiaromatic Ni-II norcorroles by their substituent effects 査読有り

Yoshida Takuya, Sakamaki Daisuke, Seki Shu, Shinokubo Hiroshi

CHEMICAL COMMUNICATIONS 53 巻 ( 6 ) 頁： 1112 - 1115 2017年1月

Stacked antiaromatic porphyrins 査読有り国際誌

Nozawa Ryo, Tanaka Hiroko, Cha Won-Young, Hong Yongseok, Hisaki Ichiro, Shimizu Soji, Shin Ji-Young, Kowalczyk Tim, Irle Stephan, Kim Dongho, Shinokubo Hiroshi

NATURE COMMUNICATIONS 7 巻頁： 13620 2016年11月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Nature Communications

Aromaticity is a key concept in organic chemistry. Even though this concept has already been theoretically extrapolated to three dimensions, it usually still remains restricted to planar molecules in organic chemistry textbooks. Stacking of antiaromatic π-systems has been proposed to induce three-dimensional aromaticity as a result of strong frontier orbital interactions. However, experimental evidence to support this prediction still remains elusive so far. Here we report that close stacking of antiaromatic porphyrins diminishes their inherent antiaromaticity in the solid state as well as in solution. The antiaromatic stacking furthermore allows a delocalization of the π-electrons, which enhances the two-photon absorption cross-section values of the antiaromatic porphyrins. This feature enables the dynamic switching of the non-linear optical properties by controlling the arrangement of antiaromatic π-systems on the basis of intermolecular orbital interactions.

DOI： 10.1038/ncomms13620

Reversible Carbon-Carbon Bond Breaking and Spin Equilibria in Bis(pyrimidinenorcorrole) 査読有り国際誌

Liu Bin, Yoshida Takuya, Li Xiaofang, Stepien Marcin, Shinokubo Hiroshi, Chmielewski Piotr J.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 55 巻 ( 42 ) 頁： 13142 - 13146 2016年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Angewandte Chemie - International Edition

Reversible homolytic dissociation of the bis(pyrimidinenorcorrole) σ-dimer was elucidated by means of variable temperature ESR and1H NMR spectroscopy, mass spectrometry, and optical spectrocopy. Dehydrogenation of the σ-dimer yielded another dimer displaying a singlet–triplet equilibrium in solution, strong NIR absorption (1570 nm), and a narrow electrochemical HOMO–LUMO gap (0.74 V).

DOI： 10.1002/anie.201607237

Syntheses and Properties of Antiaromatic Porphyrinoids 査読有り国際誌

Satoru Hiroto, Hiroshi Shinokubo

Handbook of Porphyrin Science (Volumes 36 – 40) 2016年7月

beta-to-beta 2,5-Pyrrolylene-Linked Cyclic Porphyrin Oligomers 査読有り国際誌

Rao Yutao, Kim Jun Oh, Kim Woojae, Zhong Guangming, Yin Bangshao, Zhou Mingbo, Shinokubo Hiroshi, Aratani Naoki, Tanaka Takayuki, Liu Shubin, Osuka Atsuhiro, Kim Dongho, Song Jianxin

CHEMISTRY-A EUROPEAN JOURNAL 22 巻 ( 26 ) 頁： 8801 - 8804 2016年6月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：Wiley

β-to-β 2,5-Pyrrolylene linked cyclic porphyrin oligomers have been synthesized by Suzuki–Miyaura coupling of 2,5-diborylpyrrole and 3,7-dibromoporphyrin. The cyclic porphyrin oligomers exhibit roughly coplanar structures, strong excitonic coupling, small electrochemical HOMO–LUMO gaps, and ultrafast excitation energy transfer between the neighboring porphyrins via the pyrrolylene bridge.

DOI： 10.1002/chem.201601306

Synthesis of Free-Base 10-Azacorroles 査読有り国際誌

Omori Hiroto, Hiroto Satoru, Shinokubo Hiroshi

ORGANIC LETTERS 18 巻 ( 12 ) 頁： 2978 - 2981 2016年6月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ACS Publications

A novel synthetic protocol has been developed for free-base 10-azacorroles. Ni(0)-mediated homocoupling of nitrogen-bridged bisdipyrrin Zn(II) complexes afforded a series of free-base 5,15-diaryl-10-azacorroles in good yields. Pd(II) and Cu(II) complexes have been prepared through metalation of free-base 10-azacorroles. Optical and electrochemical properties of 10-azacorrole metal complexes can be tuned by meso-aryl substituents and central metals. Cyclic voltammetry and theoretical calculations elucidated that the central metals of 10-azacorroles significantly affected their electronic properties.

DOI： 10.1021/acs.orglett.6b01323

Fully-substituted 1,3-Butadienes as pi-Conjugated Linkers between Pyrenes 査読有り国際誌

Oda Kazuma, Hiroto Satoru, Sakamaki Daisuke, Seki Shu, Shinokubo Hiroshi

CHEMISTRY LETTERS 45 巻 ( 4 ) 頁： 403 - 405 2016年4月

担当区分：最終著者,　責任著者記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：公益社団法人日本化学会

Pyrenyl-substituted 1,3-butadienes bearing alkyl and aryl groups have been synthesized by palladium-catalyzed addition of 2-borylpyrene to internal alkynes. On UV irradiation, 1-pyrenylbutadienes undergo photochromism in solution. In the solid state, 1-pyrenyl-1,2,3,4-tetraaryl-1,3-butadiene exhibits red-shifted and broad emission as compared with the alkylated butadiene. The charge-carrier mobility of 1-pyrenyl-1,2,3,4-tetraalkyl-1,3-butadiene is higher than that of the arylated butadiene.

DOI： 10.1246/cl.151181

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論文 - 忍久保 洋

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論文 - 忍久保　洋