对称型长共轭芴类衍生物的溶致变色效应及光限幅性能研究  

Solvatochromism and optical limiting properties of symmetric long conjugated fluorene derivatives

作　　者：汪俊[1] 孙新[1] 黄建民[1] 冯燕[1] 汪新[2] 

机构地区：[1]安徽大学化学化工学院与安徽省绿色高分子材料重点实验室,合肥230039 [2]池州学院材料与化学工程系,安徽池州247000

出　　处：《功能材料》2016年第1期1060-1065,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21102001;21271035)

摘　　要：通过Heck反应得到3个含有不同末端基团的对称型长共轭芴类衍生物(M1-M3),化合物结构通过NMR、IR和元素分析表征。测试了3个化合物THF溶液的紫外吸收光谱、荧光光谱和荧光量子产率,同时研究了它们在不同极性溶剂中的溶致变色效应。通过Z-扫描技术,得到3个化合物在不同入射激光能量下对应的非线性吸收系数β和双光子吸收截面σ。并对它们的皮秒光限幅性能进行了研究,结果发现M2和M3具有较好的光限幅性能。通过限幅机制分析,M2和M3的光限幅性能主要来源于双光子吸收机理。In this paper,three symmetric long conjugated fluorene derivatives(M1-M3)were synthesized by Heck reaction.The structures were characterized by NMR,FT-IR and elemental analysis.The UV-Vis absorption spectra,fluorescence spectra and quantum yields were measured in THF and solvatochromism was studied in different solvents.The nonlinear optical properties of M1-M3 under different input laser powers were measured by Z-scan technique,and the corresponding nonlinear absorption coefficients(β)and two-photon absorption cross sections(σ)were obtained.The results showed M2 and M3have the better ps optical limiting properties and the optical limiting mechanism was based on the two-photon absorption of molecules.

关 键 词：芴类衍生物 溶致变色 ZG扫描 双光子吸收 光限幅 

分 类 号：O625[理学—有机化学]