含铕配合物荧光纳米纤维的制备及光学性质的研究

通过静电纺丝技术，将发光良好的稀土配合物Eu(DBM)₃·H₂O和Eu(DBM)₄·CPC纳米微粒复合到水溶性的聚乙烯基吡咯烷酮中，制备了具有稀土铕离子红色特性荧光的聚合物纳米纤维。通过对稀土配合物以及聚合物纳米纤维样品扫描电镜和透射电镜的测试，发现当稀土配合物复合到聚合物纳米纤维中后，由于与聚乙烯基吡咯烷酮乙醇溶解性良好，其微观结构发生了变化，得到了50～100 nm左右的比较均匀的线状结构。同时，通过对稀土配合物以及聚合物纳米纤维样品的荧光激发、发射光谱及荧光寿命进行研究，表明稀土配合物在聚合物纳米纤维中比其在粉末状有更高的发光强度及更长的荧光寿命，其原因在于高分子纳米纤维为稀土配合物提供了较稳定的化学环境。

Preparation and Optical Properties of Fluorescent Nanofiber Containing Europium Complex

Through electrospinning technique, the lanthanide complex with good luminescent property, Eu(DBM)3 · H2O and Eu(DBM)4 · CPC, were incorporated into water soluble polymer PVP, and the polymer nanofibers with red characteristic fluorescent light from europium ion were obtained. The microstructure of the rare earth complexes and polymer nanofibers product was studied by scanning electron microscopy and transmission electron microscopy, and the result indicated that when the rare earth complexes were compounded into the polymer nanofibers, it＇s microstructure changed due to its good compatibility with PVP ethanol solution, and the polymer nanofibers with one dimension were of 50-100 nm relatively uniform line shape structure. In addition, the fluorescence excitation and emission spectra and fluorescence lifetime of the rare earth complexes and polymer nanofibers product were studied. Photoluminescence measurements indicate that the lanthanide complexes show superior emission lines, higher intensities and longer fluorescent lifetime in the polymer nanofibers than in the corresponding pure complex powders, which is due to the composite nanofibers providing a relatively stable environment for lanthanide complexes.