2017年5月
The role of chemisorption for push-pull chromophores on SiO2 surfaces in non-electrically poling host-guest NLO polymers
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
- 巻
- 340
- 号
- 開始ページ
- 35
- 終了ページ
- 45
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jphotochem.2017.03.007
- 出版者・発行元
- ELSEVIER SCIENCE SA
For decades, host-guest nonlinear optical (NLO) polymers have been studied because of their versatilities. NLO polymers do not display second-order nonlinearities in as-prepared conditions because the guest chromophores are randomly oriented in the host polymers and they are centro-symmetric. We report non-electrical poling behaviors of push-pull guest chromophores that consist of a pi-conjugated phenylene vinylene bridged by an electron-accepting tricyanofuran moiety and electron-donating phenyl amine derivatives in poly (methyl methacrylate). When the phenyl amine moieties were substituted either by hydroxyl or carboxyl groups, enhanced emissions of second harmonic generations (SHG) were observed after annealing at temperatures above the glass transition point of the host polymers in the absence of external electric fields. The number of hydroxyl or carboxylic groups exerted significant influence on the polar ordering of the chromophores. The orientation behaviors of the chromophores were examined using heterodyne SHG, polarized linear absorption and polarized SHG spectroscopies. (C) 2017 Elsevier B.V. All rights reserved.
- リンク情報
-
- DOI
- https://doi.org/10.1016/j.jphotochem.2017.03.007
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000400222400006&DestApp=WOS_CPL
- URL
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85014637423&origin=inward
- ID情報
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- DOI : 10.1016/j.jphotochem.2017.03.007
- ISSN : 1010-6030
- SCOPUS ID : 85014637423
- Web of Science ID : WOS:000400222400006