4-取代三唑构筑的Zn(Ⅱ)/Cd(Ⅱ)配合物的合成和结构

Syntheses and Structures of Zn(Ⅱ)/Cd(Ⅱ) Complexes Based on 4-Substituted Triazole

以4-(4-甲基苯基)-4 H-1,2,4-三唑(L1)和4-(4-硝基苯基)-4 H-1,2,4-三唑(L2)为配体,在室温条件下合成2个配合物,{[Cd(L1)(1,3-bdc)(H_2O)2][Cd(1,3-bdc)(H_2O)3]·2H_2O}n(1)和{[Zn(L2)(2,5-sdc)(H_2O)3]·H_2O}2(2)(1,3-bdc=间苯二甲酸根,2,5-sdc=2,5-噻吩二甲酸根)。测试了配合物的晶体结构,并用红外光谱、元素分析和X射线粉末衍射对其进行表征。配合物1是一维链状结构,在π-π作用和分子间氢键作用下,一维链被连接成二维网格结构。配合物2是1个双核配合物,噻吩环与苯环间的π-π作用及分子间氢键作用将双核锌配合物连接成一维链状结构。热重分析表明当温度分别高于300℃和259℃,1和2的配合物框架发生塌陷。固体荧光分析表明配合物1在373nm和430nm处有荧光发射。

Two complexes,{[Cd(L1)(1,3-bdc)(H2O)2][Cd(1,3-bdc)(H2O)3]·2H2O}n(1)and{[Zn(L2)(2,5-sdc)(H2O)3]·H2O}2(2),were synthesized at room temperature and characterized by infrared(IR)spectra,elemental analyses,powder X-ray diffractions(L1=4-p-tolyl-4 H-1,2,4-triazole,L2=4-(4-nitrophenyl)-4 H-1,2,4-triazole,1,3-bdc=benzenedicarboxylate,2,5-sdc=thiophene-2,5-dicarboxylate).The structure of Complex 1 is one-dimensional chain.The one-dimensional chain of 1 are further linked by hydrogen bonding andπ-πinteractions to yield a two-dimensional network.Complex2 is a binuclear compound.The binuclear compound is further extended into a onedimensional chain byπ-πinteractions between thiophene ring and benzene ring from adjacent binuclear compound and intermolecular hydrogen bond.The thermal stabilities analysis shows that the frameworks of 1 and 2 collapse when the temperature is higher than 300℃ and 259℃respectively.The solid fluorescence analysis shows that Complex 1displays the emission bands at 373 nm and 430 nm.