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ID 32965
フルテキストURL
著者
Guobin, Xie Okayama University
Nakamura, Mayuko Okayama University
Sueishi, Yoshimi Okayama Univresity Kaken ID researchmap
Yamamoto, Shunzo Okayama University
抄録

The effects of the additions of protic and aprotic polar solvents on the emission spectrum of 4-phenyl-1-N,N-dimethylaminobutane (PDAB) in THF have been studied under conditions of steady-state illumination. The fluorescence spectrum of PDAB in THF was reported to consist of three component bands (band A at 285 nm (fluorescence of the phenyl group), band B at 343 nm (fluorescence of the amino group) and band C at 385 nm (emission from an intramolecular exciplex)). The intensities of bands B and C decreased with increasing solvent polarity. They also decreased owing to the hydrogen-bonding interaction between the amino group in PDAB and protic solvents, but in this case the intensity of band A was found to increase. Acetonitrile has only a polar effect and trichloroacetic acid only a hydrogen-bonding (or protonation) effect, while alcohols have both effects. The equilibrium constants for the formation of intermolecular hydrogen-bonded complexes of the amino group with alcohols were estimated from the intensity change of band A. The hydrogen-bonding and polar effects of alcohols on the intensities of bands B and C could be separately evaluated. The decrease in the intensities of bands B and C with increasing solvent polarity in THF-AN and THF-alcohol mixtures is considered to be caused by the conversion of the exciplex to an ion-pair enhanced by the increase in solvent polarity.

キーワード
solvent effect
polar effect
hydrogen-bonding
fluorescence
exciplex
備考
Digital Object Identifer:10.1016/S1010-6030(03)00340-X
Published with permission from the copyright holder. This is the institute's copy, as published in the Journal of Photochemistry and Photobiology a-Chemistry, February 2004, Volume 162, Issue 1, Pages 73-79.
Publisher URL:http://dx.doi.org/10.1016/S1010-6030(03)00340-X
Direct access to Thomson Web of Science record
Copyright © 2004 Elsevier B.V. All rights reserved.
発行日
2004-2
出版物タイトル
Journal of Photochemistry and Photobiology A: Chemistry
162巻
1号
開始ページ
73
終了ページ
79
資料タイプ
学術雑誌論文
言語
English
査読
有り
DOI
Web of Science KeyUT
Submission Path
chemistry_general/4