ID | 32965 |
フルテキストURL | |
著者 |
Guobin, Xie
Okayama University
Nakamura, Mayuko
Okayama University
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
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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
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出版物タイトル |
Journal of Photochemistry and Photobiology A: Chemistry
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巻 | 162巻
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号 | 1号
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開始ページ | 73
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終了ページ | 79
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資料タイプ |
学術雑誌論文
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言語 |
英語
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査読 |
有り
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DOI | |
Web of Science KeyUT | |
Submission Path | chemistry_general/4
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