摘要
将发光良好的稀土三元配合物Eu(TTA)3phen和Tb(AA)3phen复合到水溶性的聚合物PVP中,通过静电纺丝技术得到了具有荧光特性的聚合物纳米纤维,并用扫描电镜和透射电镜对产物的微观结构进行了研究。同时研究了其荧光激发和发射光谱及荧光寿命。荧光测试表明稀土配合物在聚合物纳米纤维中比其在粉末中有更高的发光强度及更长的荧光寿命,其原因可归结为聚合物链状结构使得配合物无辐射的分子运动的受限,聚合物纳米纤维为稀土配合物提供了一个稳定的环境。该纳米纤维在紫外激发光的照射下可以发射出很强的稀土配合物的特征红光和绿光。
The ternary lanthanide complexes with good luminescent property Eu （ TFA ）3phen and Tb （AA）3phen were incorporated into water soluble polymer PVP. The fluorescent polymer nanofibers were obtained by eleetrospinning technique. The microstructure of the product was studied by scanning electron microscopy and transmission electron microscopy. In addition, their fluorescence excitation and emission spectrum and fluorescence lifetime were studied. The photoluminescence measurements indicated that thelanthanide complexes showed superior emission lines, higher intensities and longer fluorescence lifetime in the polymer nanofibers than in the corresponding pure complex powders, which could be attributed to the restriction of molecular motion of complexes by the polymer chain networks. The composite nanofibers could not only provide a relatively stable environment for lanthanide complexes but also exhibit the characteristic red and green fluorescence of lanthanide complexes under UV excitation.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2008年第5期536-541,共6页
Journal of the Chinese Society of Rare Earths
基金
山东省博士后创新基金(200703055)
国家自然科学基金重点项目(20431010)
国家自然科学基金委杰出青年基金(20325105)资助
关键词
稀土配合物
纳米纤维
高分子
荧光性质
rare earth complexes
nanofiber
polymer
fluorescen property
