稀土,′联苯甲酸配合物的合成结构及发光性能研究.doc

稀土,′联苯甲酸配合物的合成结构及发光性能研究.doc稀土-2,2′-联苯二甲酸配合物的合成、结构及发光性能研究
摘要: 本文采用水热法合成了三个稀土配位聚合物:[Ln2(H2O)2(dpa)3](Ln=Sm(1),Eu(2),Tb(3))(dpa=2,2′-联苯二甲酸),并采用单晶X-射线衍射、红外光谱、差热-热重、粉末衍射、,2′-联苯二甲酸与Ln3+离子相连形成了一条无限延伸的一维Ln-O-,dpa配体对铕离子和铽离子的发光均有较好的敏化作用, (λmax=544nm) 下发出强烈的绿光,配合物3在激发波长336nm (λmax=616nm) 下发出强烈的蓝光.
关键词: 水热法合成;2,2′-联苯二甲酸;稀土配合物;荧光光谱
Abstract:Three rare-plexes formulated as [Ln2(H2O)2(dpa)3](Ln=Sm(1),Tb(2),Eu(3))(dpa=2,2′-diphenic acid)have been hydrothermally structures and properties of all plexes were characterized by single-crystal X-ray、IR、TGA、powder XRD and photoluminescence crystal X-ray studies shows that pound has infinite Ln-O-Ln one-dimensional chains resulting from a bonding between Ln3+ cations and diphenate anions. Fluorescent analyses show that Tb3+ and Eu3+ can sensitize strong metal-centered luminescence by ligand-to-metal energy transfer. Complex 2 exhibits intense green luminescence (λmax=544nm) upon excitation at 315 nm plex 3 exhibits intense blue luminescence (λmax=616nm) upon excitation at 336 nm.
Keywords: Hydrothermal synthesis;2,2′-diphenic acid;rare-plexes;Fluorescence
目录
1 引言..........................................................................................................3
2 实验部分..................................................................................................4
试剂..................................................................................................4
仪器设备..........................................................................................5
测试方法..........................................................................................5
配合物的合成..................................................................................6
配合物的晶体结构分析..................................................................6
3 结果与讨论..............................................................................................8