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1
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Asano MS, Hashimoto S, Shinozuka T, Fushimi Y, Nomura K. Interaction between the end groups and the main chain of conjugated polymers by time-resolved EPR and fluorescence spectroscopy. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1510140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Motoko S. Asano
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Gunma, Japan
| | - Sho Hashimoto
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Gunma, Japan
| | - Takuya Shinozuka
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, Gunma, Japan
| | - Yasutaka Fushimi
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Tokyo, Japan
| | - Kotohiro Nomura
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Tokyo, Japan
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2
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Yamada T, Nomura K, Fujiki M. Noticeable Chiral Center Dependence of Signs and Magnitudes in Circular Dichroism (CD) and Circularly Polarized Luminescence (CPL) Spectra of all-trans-Poly(9,9-dialkylfluorene-2,7-vinylene)s Bearing Chiral Alkyl Side Chains in Solution, Aggregates, and Thin Films. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00241] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Takumi Yamada
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Kotohiro Nomura
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Michiya Fujiki
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5
Takayama, Ikoma, Nara 630-0101, Japan
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3
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Fujio T, Miwata T, Takase M, Sueki S, Nomura K. Facile, Efficient Synthesis of Star‐Shaped π‐Conjugated Systems by Combined Olefin Metathesis with Wittig‐type Coupling. J CHIN CHEM SOC-TAIP 2018. [DOI: 10.1002/jccs.201700058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Takashi Fujio
- Department of Chemistry Tokyo Metropolitan University, 1‐1 Minami Osawa Hachioji, Tokyo 192‐0397 Japan
| | - Tomohiro Miwata
- Department of Chemistry Tokyo Metropolitan University, 1‐1 Minami Osawa Hachioji, Tokyo 192‐0397 Japan
| | - Masayoshi Takase
- Department of Chemistry Tokyo Metropolitan University, 1‐1 Minami Osawa Hachioji, Tokyo 192‐0397 Japan
- Department of Chemistry and Biology Ehime University Matsuyama, Ehime 790‐8577 Japan
| | - Shunsuke Sueki
- Department of Chemistry Tokyo Metropolitan University, 1‐1 Minami Osawa Hachioji, Tokyo 192‐0397 Japan
| | - Kotohiro Nomura
- Department of Chemistry Tokyo Metropolitan University, 1‐1 Minami Osawa Hachioji, Tokyo 192‐0397 Japan
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4
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Miyashita T, Kunisawa M, Sueki S, Nomura K. Synthesis of Poly(arylene vinylene)s with Different End Groups by Combining Acyclic Diene Metathesis Polymerization with Wittig‐type Couplings. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tomonari Miyashita
- Department of Chemistry, Graduate School of Science and Engineering Tokyo Metropolitan University 1-1 Minami Osawa, Hachioji Tokyo 192-0376 Japan
| | - Mikiko Kunisawa
- Department of Chemistry, Graduate School of Science and Engineering Tokyo Metropolitan University 1-1 Minami Osawa, Hachioji Tokyo 192-0376 Japan
| | - Shunsuke Sueki
- Department of Chemistry, Graduate School of Science and Engineering Tokyo Metropolitan University 1-1 Minami Osawa, Hachioji Tokyo 192-0376 Japan
| | - Kotohiro Nomura
- Department of Chemistry, Graduate School of Science and Engineering Tokyo Metropolitan University 1-1 Minami Osawa, Hachioji Tokyo 192-0376 Japan
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5
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Miyashita T, Kunisawa M, Sueki S, Nomura K. Synthesis of Poly(arylene vinylene)s with Different End Groups by Combining Acyclic Diene Metathesis Polymerization with Wittig‐type Couplings. Angew Chem Int Ed Engl 2017; 56:5288-5293. [DOI: 10.1002/anie.201700466] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 03/03/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Tomonari Miyashita
- Department of Chemistry, Graduate School of Science and Engineering Tokyo Metropolitan University 1-1 Minami Osawa, Hachioji Tokyo 192-0376 Japan
| | - Mikiko Kunisawa
- Department of Chemistry, Graduate School of Science and Engineering Tokyo Metropolitan University 1-1 Minami Osawa, Hachioji Tokyo 192-0376 Japan
| | - Shunsuke Sueki
- Department of Chemistry, Graduate School of Science and Engineering Tokyo Metropolitan University 1-1 Minami Osawa, Hachioji Tokyo 192-0376 Japan
| | - Kotohiro Nomura
- Department of Chemistry, Graduate School of Science and Engineering Tokyo Metropolitan University 1-1 Minami Osawa, Hachioji Tokyo 192-0376 Japan
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6
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Fushimi Y, Koinuma M, Yasuda Y, Nomura K, Asano MS. Effects of End-Groups on Photophysical Properties of Poly(9,9-di-n-octylfluorene-2,7-vinylene)s Linked with Metalloporphyrins: Synthesis and Time-Resolved Fluorescence Spectroscopy. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00047] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Yasutaka Fushimi
- Department
of Chemistry, Faculty of Science and Engineering, Tokyo Metropolitan University, 1-1 minami
Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Misaki Koinuma
- Division
of Molecular Science, Faculty of Science and Engineering, Gunma University, 1-5-1
Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Yoshifumi Yasuda
- Division
of Molecular Science, Faculty of Science and Engineering, Gunma University, 1-5-1
Tenjin-cho, Kiryu, Gunma 376-8515, Japan
| | - Kotohiro Nomura
- Department
of Chemistry, Faculty of Science and Engineering, Tokyo Metropolitan University, 1-1 minami
Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Motoko S. Asano
- Division
of Molecular Science, Faculty of Science and Engineering, Gunma University, 1-5-1
Tenjin-cho, Kiryu, Gunma 376-8515, Japan
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7
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Kan K, Fujiki M, Akashi M, Ajiro H. Near-Ultraviolet Circular Dichroism of Achiral Phenolic Termini Induced by Nonchromophoric Poly(l,l-lactide) and Poly(d,d-lactide). ACS Macro Lett 2016; 5:1014-1018. [PMID: 35614637 DOI: 10.1021/acsmacrolett.6b00513] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Herein, we present the first induced chirality of vanillin and its phenolic analogs attached to the chain ends of poly(l,l-lactide) and poly(d,d-lactide). Vanillin analogs were used as chromophoric and luminophoric, but achiral, ring-opening initiators of corresponding chiral cyclic lactides. Induced chirality was evident from clear circular dichroism bands at 270-320 nm due to π-π* and n-π* transitions at the vanillin moiety. However, no circularly polarized luminescence band was detected. Density functional theory (DFT) and time-dependent DFT calculations suggested the existence of multiple through-space intramolecular CH/O interactions between the ortho-methoxy moiety of vanillin and nearest-neighbor lactic acid units. The terminus sensitively indicated whether the main-chain chirality was l or d.
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Affiliation(s)
| | | | - Mitsuru Akashi
- Graduate
School of Frontier Biosciences, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Japan
| | - Hiroharu Ajiro
- JST PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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