苝四羧酸多联体化合物的合成及其光谱特性研究

本文合成了８个四羧酸多联体化合物；测定了这些化合物的吸收光谱、荧光光谱．研究了由供电子分子键连的多联体分子的光谱特性及其分子体系内稳态荧光猝灭机理．首次从吸收光谱和荧光光谱上分析和考察了四羧酸多联体化合物分子体系内的光致电子转移反应．

SYNTHESIS AND SPECTRAL CHARACTERIZATION SPECIFICITIES OF MULTIPLEX PERYLENE-TETRACARBOXYLIC COMPOUNDS

A series of multiplex perylenetetracarboxylic compounds were synthesized by linking two functional subunits, via an oxo bridge, to the para position of the phenyl groups of N,N' diphenyl 3,4,9,10 perylenetetracarboxylic diimide(PTCDI). UV visible and fluorescence spectra were determined and discussed. Some of these compounds showed a novel spectral behavior: strong UV visible absorption but weak fluorescence emission. It was suggested that the differences in the fluorescence quantum yield were due to the intramolecular photoinduced electron transfer reactions and charge separations in the PTCDI electron donor linked multiplex systems. The intramolecular energy transfer resulted in the fluorescence steady state quenching.