中文摘要：

用800nm波长的飞秒Ti：sapphire激光测定了2个对称型噁二唑衍生物2，5-二[4-（2-N，N-二苯氨基苯乙烯基）苯基]-1，3，4-噁二唑（PASPO）与2，5-二[4-{2-N，N-二-（4-溴代苯）氨基苯乙烯基]苯基}-1，3，4-噁二唑（BrPASPO）的双光子吸收和双光子激发荧光光谱，其飞秒双光子吸收截面为20．6和9．91GM，双光子泵浦上转换荧光最大波长分别在535和545nm。测定了紫外吸收、荧光光谱，研究了化合物在不同溶剂中的溶致变色效应。化合物PASPO和BrPASPO在二氯甲烷溶液中的吸收峰分别位于412和403nm，荧光发射峰分别位于511和495nm，荧光量子产率分别为0．73和070．

英文摘要：

The two-photon absorption and the two-photon-excited fluorescence spectra of two symmetrical chromophores 2,5-Bis[4-（2-N, N-diphenylaminostyryl） phenyl]-1, 3,4-oxadiazole （PASPO） and 2,5-bis { 4-[2-N, N-di （4-bromophenyl） aminostyryl） phenyl]-1, 3,4-oxadiazole （BrPASPO） were measured using a femtosecond Ti： sapphire laser at 800 nm. Their two-photon absorption cross-sections obtained by nonlinear transmission method are 20.6 and 9.91GM. Pumped by a femtosecond laser at 800nm, strong upconversion fluorescence with the central wavelength at 535 and 545nm in the solution of CH2Cl2 have been observed. The maximum peaks of single-photon-excited fluorescence in the solution of CH2Cl2 are at 512nm for PASPO and at 495nm for BrPASPO with high fluorescence quantum yields 0.73 and 0.70, respectively.