一类新型荧光化学敏感器形成激基缔合物的温度效应

对一类具有分子识别功能的荧光分子敏感器化合物，在水溶液中形成的分子内激基缔合物的温度效应进行了研究。进而提出该类化合物在水溶液中进行了内单体和分子内激基缔合物转化的机制。通过分析所得的热力学数据，同文献值相比较，推导出该类化合物在水溶液中可能存在的几何构型，为该类化合物在作为探针应用时提供理论依据。

Temperature Dependence of Excimer Formation of a New Kind of Fluorescence Chemosensor

The Inonomer and excimer fluorescence bands recorded in aqueous solution of a new kind of fluorescence chemosensor which have the ability of recognition exhibit an "isosbestic"point over certain limited ranges of temperatures. The temperature dependence of their excimer forulation was studied. The mechanism of the transformation between monomer and excimer and the excimer geometrical configuration have been proposed. From the temperature conefficient of the ratio of excimer to monomer fluorescence intensities at the isosbestic wavelength the value of enthalpy and entropy in the process of transformation can be estimated. The repulsive energy between unexcited molecule in the excimer configuration contributes to the excimer fornmtion of these fluorescence chemosensor. These results provide a base for their applications.