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以Bi(NO3)3.5H2O、2-吡啶甲酸和2,2’-联吡啶为原料,合成了配合物[Bi(C10H8N2)(C5H4NCOO)(NO3)2].0.5H2O,并采用元素分析、红外光谱(FT-IR)、热重分析(TG-DSC)、X射线粉末衍射(XRD)和荧光光谱对其组成和结构进行了表征。结果表明,该配合物具有荧光性质,且Bi3+与2-吡啶甲酸中的两个羧基O原子、2,2’-联吡啶的2个N原子及两个NO-3形成六配位螯合物。在空气中其热分解包括失去结晶水、配体的逐步挥发与氧化分解过程,550℃后完全形成Bi2O3。对其X射线粉末衍射数据进行指标化计算证实该配合物晶体结构属于单斜晶系,晶胞参数为:a=1.810 nm,b=1.285 nm,c=1.214 nm,β=88.83°。
The complex [Bi (C10H8N2) (C5H4NCOO) (NO3) 2] .0.5H2O was synthesized from Bi (NO3) 3.5H2O, 2-picolinic acid and 2,2’-bipyridyl and analyzed by elemental analysis Its composition and structure were characterized by FT-IR, TG-DSC, X-ray powder diffraction (XRD) and fluorescence spectroscopy. The results show that the complex has fluorescent properties and Bi3 + forms two hexagonal chelates with two carboxyl O atoms in 2-picolinic acid, two N atoms in 2,2’-dipyridyl and two NO-3 . Its thermal decomposition in the air, including the loss of crystal water, the gradual evaporation of the ligand and the process of oxidative decomposition, Bi2O3 completely formed after 550 ℃. The crystal structure of the complex belongs to the monoclinic system. The parameters of a unit cell are: a = 1.810 nm, b = 1.285 nm, c = 1.214 nm, β = 88.83 °.