静电纺丝技术制备Eu(BA)_3phen/PVP复合纳米带及发光性质研究  

Preparation and Photoluminescence Properties of Eu(BA)_3phen/PVP Composite nanobelts via Electrospinning

作　　者：刘仁源[1] 董相廷[1] 柳建文[1] 王进贤[1] 刘桂霞[1] 

机构地区：[1]长春理工大学化学与环境工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2011年第3期118-121,131,共5页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50972020;51072026);博士导基金项目(20102216110002)

摘　　要：采用静电纺丝技术合成了Eu(BA)3phen/PVP复合纳米带,用扫描电镜,红外光谱,紫外-可见吸收光谱和荧光光谱对样品进行了表征。扫描电镜分析表明,纳米带表面光滑,宽度为1-6μm,平均厚度为230 nm。红外光谱分析表明,Eu3+与配体发生键合,在430 cm-1出现了Eu3+-O2-特征振动峰。紫外-可见吸收光谱分析表明,Eu(BA)3phen/PVP复合纳米带的吸收带与纯Eu(BA)3phen配合物相比,发生了红移。激发光谱分析表明,Eu(BA)3phen/PVP复合纳米带在210-360nm之间有较宽的吸收带,最大吸收波长位于275 nm。发射光谱分析表明,在275 nm紫外光激发下,Eu(BA)3phen/PVP复合纳米带的发射主峰为位于617 nm的红光,属于Eu3+的5D0→7F2跃迁。电偶极跃迁与磁偶极跃迁强度的比值约为2.8,表明配合物中Eu3+位置的对称性较低,不存在反演中心。Eu（BA）3phen/Polyvinyl Pyrrolidone（PVP） composite nanobelts were fabricated by electrospinning,and were characterized by scanning electron microscopy（SEM）,Fourier transform infrared spectrometry（FTIR）,UV-Vis spectrome-try（UV-Vis） and photoluminescence spectrometry（PL）.SEM micrographs analysis indicates that the surface of the com-posite nanobelts is smooth,and the width of the nanobelts is in the range of 1-6 μ m,the thickness is 230 nm.FTIR analysis manifests that Eu3＋ ions bond with ligands accompanied with Eu3＋-O2-vibrational peak at 430 cm-1.UV-Vis analysis shows absorption band of Eu（BA）3phen/PVP is red-shifted compared with Eu（BA）3phen.Their luminescent properties were studied.Eu（BA）3phen/PVP composite nanbelts have wide absorption in the range from 210 nm to 360 nm.Under ultraviolet excitation（275 nm）,the Eu（BA）3phen/PVP composite nanobelts emit the main emission peak at 617 nm,corresponding to 5D0-7F2 transition of Eu3＋.The ratio of electric-dipole（5D0→7F2）transition and magnetic-dipole（5D0→7F1）transition is 2.8,which shows Eu3＋ ions occupy low symmetry of coordinated environment without inversion symmetry.

关 键 词：静电纺丝技术 Eu(BA)3phen 纳米带 光致发光 

分 类 号：TQ340.6[化学工程—化纤工业]