A re-evaluation of the photophysical properties of 1,4-bis(phenylethynyl)benzene: A model for poly(phenyleneethynylene)

被引：161

作者：

Beeby, A ^{[1
]}

Findlay, K ^{[1
]}

Low, PJ ^{[1
]}

Marder, TB ^{[1
]}

机构：

[1] Univ Durham, Dept Chem, Durham DH1 3LE, England

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2002年 / 124卷 / 28期

关键词：

D O I：

10.1021/ja025568h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photophysical measurements, recorded in aerated cyclohexane at 283 K, indicate that 1,4-bis-(phenylethynyl) benzene behaves in a conventional manner, undergoing emission from the lowest vibrational level of the first excited singlet state; there is no evidence for aggregation of this material in cyclohexane solution in the concentration range (1-250) x 10(-6) mol dm(-3). However, in highly viscous, low-temperature glasses, the material does exhibit inhomogeneous fluorescence behavior, and wavelength-dependent excitation and emission spectra, indicative of a slow rate of relaxation of conformers of the excited states compared to the rate of fluorescence.

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页码：8280 / 8284

页数：5

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