含铽配合物的PVP纤维的制备及发光性质  

Preparation and Fluorescent Properties of Terbium-Complex/PVP Electrospun Fiber

作　　者：王志华[1,2] 温世鹏[1,2] 胡水[1,2] 张法忠[1] 刘力[1,2,3] 张立群[1,2,3] 

机构地区：[1]北京化工大学碳纤维及功能高分子材料教育部重点实验室,北京100029 [2]北京市新型高分子材料制备与加工重点实验室,北京100029 [3]北京化工大学教育部纳米材料重点实验室,北京100029

出　　处：《中国稀土学报》2010年第6期685-692,共8页Journal of the Chinese Society of Rare Earths

基　　金：国家"十一五"科技支撑计划资助项目(2006BAE03B02)

摘　　要：通过静电纺丝法制得了含有稀土铽配合物（Tb（AA）3Phen）的聚乙烯吡咯烷酮（PVP）的荧光纤维丝。通过考察纺丝液的浓度,静电纺丝过程中的电压、溶剂配比以及电导率对PVP纤维丝形貌的影响,制备出表面光滑、直径均一、尺寸大小在80~150 nm之间的纤维。荧光性能测试显示,Tb（AA）3Phen/PVP纤维的荧光强度随着Tb（AA）3Phen含量的增加而增加,稀土配合物含量为15%时,纤维的荧光强度达到最强,之后出现浓度猝灭现象;通过X射线衍射（XRD）、透射电镜（TEM）等测试表明,Tb（AA）3Phen在PVP纤维中以分子簇或极小颗粒（小于10 nm）的状态存在,这种良好的分散效果减小了电子在跃迁过程中的非辐射跃迁几率,从而增强了纤维的荧光强度和荧光寿命。The polyvinylpyrrolidone（PVP） fibers containing Tb（AA）3Phen complexes were generated through electrospinning.The influence of different Tb（AA）3Phen concentrations,voltage,ratios of the two solvents and the solution conductivity on the morphology of PVP fiber was investigated.The electrospun fibers with the diameter of 80~150 nm possessed smooth surface and uniform diameter distribution.The fluorescent spectra showed that the fluorescence intensity of Tb（AA）3Phen/PVP fibers increased with increasing Tb（AA）3Phen content and reached its maximal value at 15%（mass fraction）.This was followed by emission concentration quenching with further increasing the Tb（AA）3Phen content.The TEM observation and XRD analysis revealed that the Tb（AA）3Phen dispersed in the PVP fibers in the state of molecular clusters or tiny particles（d10 nm）.Due to the fine dispersion of Tb（AA）3Phen,the nonradiative transition rate of the fluorescent fibers decreased,which resulted in increased fluorescence intensity and fluorescence life of the fibers.

关 键 词：铽 静电纺丝 纳米纤维 荧光性能 

分 类 号：O614.341[理学—无机化学] O482.31[理学—化学]