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Br-PASPO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0.70。
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.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第11期1774-1777,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(60678042)
东南大学科学基金资助项目(9207041399)
关键词
对称化合物
双光子吸收
上转换荧光
symmetrical chromopbore
two-photon absorption
upconversion fluorescence
