Fluorescence photoswitching of a diarylethene-perylenebisimide dyad based on intramolecular electron transfer
Fluorescence photoswitching of a diarylethene-perylenebisimide dyad based on intramolecular electron transfer
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DOI：
10.1039/b9pp00131j
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发表时间：
2010-01-01
影响因子：
3.1
通讯作者：
Irie, Masahiro
中科院分区：
文献类型：
--
作者：
Fukaminato, Tuyoshi;Tanaka, Masaaki;Irie, Masahiro
合成了一种由光致变色二芳基乙烯(DE)和荧光二苯二亚胺(PBI)组成的荧光光致变色分子，并研究了其荧光光开关。开环异构体的荧光量子产率与溶剂的极性无关，而闭环异构体的荧光量子产率随溶剂介电常数的增大而减小。飞秒时间分辨瞬变和荧光寿命测量表明，闭环异构体的荧光猝灭归因于分子内电子从PBI发色团到DE单元的转移。
A fluorescent photochromic molecule, which is composed of a photochromic diarylethene (DE) and a fluorescent perylenebisimide (PBI), was synthesized and its fluorescence photoswitching was studied. The fluorescence quantum yield of the open-ring isomer is constant irrespective of solvent polarity, while that of the closed-ring isomer decreases with an increase in the dielectric constant of solvents. Femtosecond time-resolved transient and fluorescence lifetime measurements revealed that the fluorescence quenching of the closed-ring isomer is attributed to the intramolecular electron transfer from the PBI chromophore to the DE unit.