Photoinduced Electron Transfer in Coaggregates of Dicyanonaphthalene and Pyrazoline

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• 作者：Fugang Shen ; Aidong Peng ; Yu Chen ; Yang Dong ; Ziwen Jiang ; Yaobing Wang ; Hongbing Fu ; Jiannian Yao
• 刊名：Journal of Physical Chemistry A
• 出版年：2008
• 出版时间：March 20, 2008
• 年：2008
• 卷：112
• 期：11
• 页码：2206 - 2210
• 全文大小：300K
• 年卷期：v.112,no.11(March 20, 2008)
• ISSN：1520-5215

文摘

The photophysical properties of mixed coaggregates containing 1,4-dicyanonaphthalene (DCN) and 1,3,5-triphenyl-2-pyrazoline (TPP) have been studied. The absorption spectra of mixed coaggregates indicate thata charge-transfer complex is not formed in the ground state between DCN and TPP. The fluorescence of TPPin the mixed coaggregates is quenched by DCN, accompanied with a broad and structureless emission atabout 560 nm from an exciplex between DCN and TPP. The color of the emission from mixed coaggregatesis tunable by changing the DCN content. The excited-state properties of the TPP-DCN molecule pair areinvestigated theoretically with a quantum chemistry method. The theoretical results have also confirmed thatthe broad emission at about 560 nm in the mixed coaggregates originates from the exciplex rather than fromthe charge-transfer complex.