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タイトル: | PPV-type π-conjugated polymers based on hypervalent tin(IV)-fused azobenzene complexes showing near-infrared absorption and emission |
著者: | Gon, Masayuki https://orcid.org/0000-0002-5540-5908 (unconfirmed) Tanimura, Kazuya Yaegashi, Misao Tanaka, Kazuo https://orcid.org/0000-0001-6571-7086 (unconfirmed) Chujo, Yoshiki |
著者名の別形: | 権, 正行 谷村, 和哉 八重樫, 操 田中, 一生 中條, 善樹 |
キーワード: | Conjugated polymers Photochemistry |
発行日: | Nov-2021 |
出版者: | Springer Nature |
誌名: | Polymer Journal |
巻: | 53 |
号: | 11 |
開始ページ: | 1241 |
終了ページ: | 1249 |
抄録: | We demonstrate near-infrared (NIR) absorptive and emissive poly(p-phenylene vinylene) (PPV)-type π-conjugated polymers based on hypervalent tin-fused azobenzene (TAz) complexes. Taking advantage of the inherent narrow-energy gap of TAz complexes originating from the three-center four-electron (3c-4e) bond and nitrogen–tin (N–Sn) coordination, the synthesized polymers, TAz-PPVs, showed absorption, and emission in wavelength regions of >750 and 810 nm in diluted solution, respectively. From the experimental and theoretical investigations, the elevation of the highest occupied molecular orbital (HOMO) and the reduction of the lowest unoccupied molecular orbital (LUMO) were simultaneously shown to be caused by the extension of π-conjugation. The effective conjugation length was calculated to be n > 10 (n: degree of polymerization), and the value was comparable to conventional PPV systems. Through this research, we revealed that π-conjugated systems including hypervalent bonds were able to expand π-conjugation. According to the concept of “element blocks”, the development of heteroatom-containing narrow-energy-gap monomers should be a novel approach for the construction of new NIR-absorptive and emissive bland materials. |
著作権等: | This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1038/s41428-021-00506-x The full-text file will be made open to the public on 10 December 2021 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 |
URI: | http://hdl.handle.net/2433/267497 |
DOI(出版社版): | 10.1038/s41428-021-00506-x |
出現コレクション: | 学術雑誌掲載論文等 |
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