期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 123, 期 18, 页码 4259-4265出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja003959v
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A series of photophysical measurements and semiempirical calculations were carried out with 1,4-bis(phenylethynyl)benzene in search of evidence on the effects of phenyl group rotation and chromophore aggregation of oligo- and poly(phenyleneethynylene)s. It is suggested that planarization gives rise to relatively modest shifts of ca. 20-30 nm, which preserve the vibronic structure of the monomer and retain a high emission quantum yield. In contrast, it is proposed that aggregation gives rise to larger shifts and loss of vibronic structure.
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