取代氧翁盐化合物的分子内电荷转移和光谱行为的研究

合成了一组带不同取代基的2,4,6-三芳基氧翁盐化合物, 对它们在不同溶剂中的光物理行为进行了研究表明: 取代基的性质(推或拉电子)和位置(X轴或Y轴)对化合物的发光有很大影响。本工作还利用荧光去偏振方法研究了氧翁盐化合物分子内的能量转移以及通过加入三氟醋酸使叔胺季铵盐化方法, 为这类化合物提供了在非水溶剂中作为荧光指示剂应用的可能性。

A study on the intramolecular charge transfer and the photophysical behavior of 2,4,6-trisubstituted pyrylium salt

In this work, a series of 2,4,6-trisubstituted pyrylium compounds were synthesized. The photophysical behavior of these compounds in solvents with different polarities has also been measured. Results indicated that introduction of electrondonating or accepting substituents and their positions (X- or Y-chromophore) have signiticant effect on the luminescence behavior of these compounds. Fluorescence depolarization method proved that intramolecular energy transfer may occur between X- and Y-chromophore in 2,4,6- trisubstituted pyrylium. It was also found that pyrylium compounds with N,N-dimethylamino phenyl groups could be used as a potential fluorescence indicator in non-aqueous solution by the transformation of tertiary amine into quaternary ammonium salt with addition of trifluoroacetic acids.