静电纺丝技术制备Tb（BA）3phen/PVP复合纤维与发光性质研究

采用静电纺丝技术合成Tb(BA)3phen/PVP复合纤维.扫描电镜分析表明,纤维表面光滑,无交联,直径集中分布在350 nm.红外光谱分析表明,Tn3+与配体发生键合,在424 cm-1出现了Tb3+ - O2-特征振动峰.紫外-可见吸收光谱分析表明,Tb (BA)3 phen/PVP复合物的吸收带发生蓝移.激发光谱分析表明,Tb(BA)3 phen/PVP复合纤维在214-355 nm之间有较宽的吸收谱带,对应着配体的π→π*跃迁,最佳吸收波长位于275 nm.发射光谱分析表明,最强发射峰位于545 nm处,对应着Tb3+的5 D4→7 F5跃迁.

Preparation of Tb(BA)3phen/PVP of Composite Fibers by Electrospinning and Their Luminescence Properties

Tb(BA)3phen/Polyvinyl Pyrrolidone(PVP)composite fibers were fabricated by electrospinning,and were characterized by scanning electron microscopy(SEM),Fourier transform infrared spectrometry(FTIR),UV-Vis spectrometry(UV-Vis)and photoluminescence spectrometry(PL).SEM micrograph analysis indicates that the surface of the composite fibers is smooth without cross-linking,and the average diameter of the composite fibers is 350 nm.FTIR analysis manifests that Tb3+ ions bond with ligands accompanied with Tb3+-O2-vibrational peak at 424 cm-1.UV-Vis analysis shows absorption band of Tb(BA)3phen/PVP is blue-shifted compared with Tb(BA)3phen.Their luminescent properties were studied.The excitation spectrum shows a wide absorption band from 214 nm to 355 nm with the strongest peak at 275 nm,corresponding to the π→π* transition.Under ultraviolet excitation(275 nm),the Tb(BA)3phen/PVP composite fibers present characteristic emission of Tb3+ with the strongest peak at 545 nm corresponding to the5D4→7F5transition.