摘要
在乙醇体系中,由硝酸铋和8-羟基喹啉(HQ)反应,合成了[Bi(NO_3)Q_2]·H_2O铋(Ⅲ)-8-羟基喹啉配合物.用元素分析、红外光谱、粉末X-射线衍射和单晶X-射线衍射对配合物进行了表征和结构分析.单晶X-射线衍射分析结果表明,该配合物属于单斜晶系,C2/c空间群,a=2.445 04(13)nm,b=0.819 6(4)nm,c=2.071 8(10)nm,β=118.406(5)°,V=3.651 9(3)nm3,Z=8,F(000)=2 192,μ(Mo Kα)=9.698 mm-1.测定了配体、标题配合物及铕掺杂(摩尔分数:5%,10%,15%,20%)配合物的荧光光谱,结果表明,无论是标题配合物还是铕掺杂的配合物均显示配体的荧光,既没有铋离子的特征发射,也没有铕离子的特征发射.说明配合物的荧光是配体的荧光;而配合物的荧光强度大于配体,说明金属离子对配体的荧光有敏化作用.
A novel bismuth ( Ⅲ ) complex of [ Bi ( NO3 ) Q2 ] ·H2O( HQ = 8-hydroxyquinoline) was synthesized in ethanol and characterized by elemental analysis, IR spectra, PXRD. Its crystal structure was determined by single X-ray diffraction. The complex was crystallized in monoclinic system with space group C2/c, cell parameters of a = 2.44504(13) nm, b = 0.8196(4) nm, c = 2.0718(10) nm, β = 118.406(5)°, V = 3. 651 9 (3) nm^3, number of molecules inside the cell: Z = 8, number of electrons: F(000) = 2 192, absorptive parameter:μ( Mo Kα) = 9. 698 mm^-1. The emission spectra of complex doped with Eu^3+ (5%, 10%, 15%, 20%, molar fraction ) instead of Bi^3+ were also investigated under the 470 nm excitation. The results showed that a luminescence emission peak of the ligand was observed at 570 nm, without the characteristic emission of Bi^3+ and Eu^3+. It indicated that the central metal could sensitize the ligand.
出处
《浙江师范大学学报(自然科学版)》
CAS
2017年第1期58-63,共6页
Journal of Zhejiang Normal University:Natural Sciences
基金
浙江省自然科学基金资助项目(LY12B01003)
关键词
8-羟基喹啉
铋配合物
晶体结构
荧光性质
8-hydroxyquinoline
bismuth complex
crystal structure
fluorescence property