2－（2＇－羟基苯基）苯并噁唑在高分子介质中的激发态分子内质子转移和光谱

Excited-state Intramolecular Proton Transfer and Spectroscopy of 2-(2'-Hydroxy phenyl) benzoxazole in Solid Polymer Matrices

首次报道了２－（２＇－羟基苯基）苯并ｆ唑（ＨＢＯ）分子在若干高分子固体膜中的电子光谱和激发态分子内质子转移（ＥＳＩＰＴ）的特性，并与溶液体系中的相应特性进行了比较，揭示了新的吸收和发射带，并讨论了高分子基质对这些特性的影响和作用机制。

This paper first reports the spectroscopy and the properties of excited-state intramolecular proton transfer(ESIPT) of 2-(2'-hydroxy phenyl) benzoxazole(HBO) in some solid polymer matrices and the matix effects on them,The results show that:(1) The properties of ESIPT and spectra of HBO in the non-polar and weak polar polymer matrices would not be modified compared with those in the solution systems.The matrices,on the other hand,could improve the quantum yield of ESIPT fluorescence,(2) The polymer matrices with strong H-bonding activity and polarity can modify the spectra and the ESIPT efficiency of HBO due to the formation of H-bonding complex between HBO and the matrix,which,however,could be eliminated effectively by using a special micelle method to isolate HBO from the matrices.(3) Thermodynamic equilibrium of the ground state rotamers of HBO in the solid polymer matrices seems to have a tendency which is unfavourable to the formation of the rotamer Ⅰ andⅢ.