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

Beeby, A. and Findlay, K. and Low, P. J. and Marder, T. B. (2002) 'A re-evaluation of the photophysical properties of 1,4-bis(phenylethynyl)benzene : a model for poly(phenyleneethynylene).', Journal of the American Chemical Society., 124 (28). pp. 8280-8284.

Abstract

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.

Item Type:Article
Full text:Full text not available from this repository.
Publisher Web site:http://dx.doi.org/10.1021/ja025568h
Record Created:12 Apr 2007
Last Modified:08 Apr 2009 16:29

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