Effect of aggregation on the excited-state electronic structure of perylene studied by transient absorption spectroscopy

被引:57
作者
Furube, Akihiro [1 ]
Murai, Miki [1 ]
Tamaki, Yoshiaki [1 ]
Watanabe, Sadayuki [1 ]
Katoh, Ryuzi [1 ]
机构
[1] Natl Inst Adv Ind Sci & Technol AIST, Tsukuba, Ibaraki 3058565, Japan
关键词
D O I
10.1021/jp060649b
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The effect of aggregation on the excited-state electronic structure of perylene was studied through transient absorption measurements of isolated molecules, excimers, monomeric crystals (beta-perylene), and dimeric crystals ( alpha-perylene). Changes of electronic state were clearly identified from the changes in transient absorption spectra. A detailed investigation was made by combining the obtained results with previous measurements of ground-state absorption and fluorescence spectra. The energy level of the ion-pair state in alpha-perylene crystals was estimated, and the results are compared with previous photoconductivity results. Moreover, the relaxation processes of excited states in alpha-perylene crystals were studied by femtosecond transient absorption measurements.
引用
收藏
页码:6465 / 6471
页数:7
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