三维Zn(Ⅱ)配位聚合物{[Zn_4(trz)_4(Hnip)_2(nip)]·2H_2O}_n的水热合成、晶体结构和荧光性质

Hydrothermal synthesis,crystal structure and magnetic property of a 3D coordinated complex {[Zn_4(trz)_4(Hnip)_2( nip)]·2H_2O}_n

采用水热合成法合成了一种新型的金属有机配合物{[Zn_4(trz)_4(Hnip)_2(nip)]·2H_2O}_n(Htrz=1,2,4-三氮唑,H_2nip=5-硝基间苯二甲酸).通过X射线单晶衍射、X射线粉末衍射、元素分析和红外光谱对其结构进行表征,结果表明该化合物属于单斜晶系,C2/c空间点群,其晶胞参数分别为a=23.497 3(6)nm,b=13.763 1(4)nm,c=14.065 2(3)nm,β=91.721(2)°,Z=4,V=4 546.6(2)nm^3,D_c=1.805 mg/m^3,M_r=1 235.25,μ=3.285 mm^(-1),F(000)=2 479,R_1=0.062 5,ωR_2=0.172 0.中心离子Zn(Ⅱ)通过Htrz配体连接形成Zn1和Zn2两种SUBs,这两种SUBs交叉相连形成了{[Zn_4(trz)_4]^(4+)}_n的二维面,最终H_2nip连接这些二维层形成了一个三维网状结构.此外,该配合物的荧光性能也得到了研究.

A nove/metal-organic complex / [ Zn4 （trz） 4 （ Hnip ） 2 （ nip ） ]· 2H2O }n （ Htrz = 1,2,4-triazole, H2nip= 5-nitroisophthalic acid） has been hydrothermally synthesized.The structure was characterized by techniques of single-crystal X-ray diffraction analysis, powder X-ray diffraction, elemental analysis, infrared spectra, revealing that the structure of the synthesized complex belongs to monoelinic system with space group C2/c. The cell parameters are as follows ： a = 23.497 3 （6） nm, b = 13.763 1 （ 4 ） nm, c = 14.065 2 （ 3 ） nm, [3 = 91.721 （2） °, Z = 4, V = 4 546.6 （2） nm3, Dc = 1.80 5 mg/m3, Mr = 1 235.25,μ = 3.285 mm-1, F （000） = 2 479, R1 = 0.062 5 ,for2 =0.172 0.The central ion Zn（ ]] ） is coordinated with Htrz ligands to form two kinds of SUBs about Znl and Zn2.These two kinds of SUBs are cross-connected to construct a 2D surface of {[ Zn4（trz）4 ] 4＋ }n.And adjacent 2D layers are packed into a 3D network by H2nip ligands.Furthermore, the solid state fluorescent prop- erties of complex have been investigated.