Photophysical investigation on molecular aggregation of 1-benzyl-2-hydro[60]fullerene in Langmuir–Blodgett multilayers

The aggregation behavior of a substituted fullerene compound, 1-benzyl-2-hydro[60]fullerene (C 60-Bh), in Z-type Langmuir–Blodgett (LB) multilayers has been studied by UV–VIS absorption, steady-state and time-resolved fluorescence spectroscopics. The LB multilayers of pure C 60-Bh showed J-aggregate...

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Published in:Chemical physics letters 1997-12, Vol.280 (3), p.308-314
Main Authors: Ma, Shihong, Lu, Xingze, Xu, Jianhua, Zhou, Guangpeng, Cai, Zhigang, Zhou, Jianying, Wang, Wencheng, Li, Yufen
Format: Article
Language:English
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Summary:The aggregation behavior of a substituted fullerene compound, 1-benzyl-2-hydro[60]fullerene (C 60-Bh), in Z-type Langmuir–Blodgett (LB) multilayers has been studied by UV–VIS absorption, steady-state and time-resolved fluorescence spectroscopics. The LB multilayers of pure C 60-Bh showed J-aggregate formation, characterized by a large red-shift of two absorption peaks (Δ E∼2098 cm −1 from 260→275 nm and Δ E∼1076 cm −1 from 328→340 nm). The main fluorescence emission bands were found at 710, 646, 603 and 595 nm for pure C 60-Bh, mixed C 60-Bh/arachidic acid (AA) (1:1), mixed C 60-Bh/nitrogencrown (NC) (1:3) multilayers and monomeric C 60-Bh in solution, respectively. The aggregates were dissociated by mixing with AA or NC. The fluorescence decay profiles of C 60-Bh, C 60-Bh/AA and C 60-Bh/NC in LB films could be fitted by a bi-exponential decay model.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(97)01129-9