Research Institute for Electronic Science, Hokkaido University, N20, W10, Kita-ku, Sapporo 001-0020, Japan.
Photochem Photobiol Sci. 2010 Feb;9(2):181-7. doi: 10.1039/b9pp00131j. Epub 2010 Jan 6.
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.
一种荧光光致变色分子，由光致变色二芳基乙烯（DE）和荧光苝二酰亚胺（PBI）组成，被合成并研究了其荧光光致开关性能。开环异构体的荧光量子产率与溶剂极性无关，而闭环异构体的荧光量子产率随溶剂介电常数的增加而降低。飞秒时间分辨瞬态和荧光寿命测量表明，闭环异构体的荧光猝灭归因于从 PBI 发色团到 DE 单元的分子内电子转移。
