论文部分内容阅读
利用溶液法制备了稀土元素Sm(Ⅲ)与N,-N′-二乙酸基咪唑内盐(分子式:HOOCCH_2(C_3H_3N_2)+CH_2COO-,缩写HDAM)的配合物{[Sm(trans-DAM)_2(H_2O)_2]NO_3·3H_2O}n(1),即按一定的比例将选择的金属盐及配体溶解在适当的溶剂中,常温下静置、挥发,使配位化合物缓慢结晶析出。经X-射线单晶衍射法测定,该化合物属三斜晶系,P-1空间群,a=8.509(2),b=10.847(2),c=13.440(3),α=81.39(3)°,β=74.79(3)°,γ=79.81(3)°,V=1 171.2(4)~3,Z=2,Dc=1.896 mg/m~3,F(000)=666,R1=0.1068,wR_2=0.285 0。同时,利用红外光谱、紫外-可见光谱和荧光光谱对化合物1进行了结构表征。在化合物的结构中trans-DAM-(i)采取μ4-模式,两羧基均表现为μ_2-η~1:η~2配位;trans-DAM-(ii)中一羧基为单齿μ_1-η~0:η~1连接,另一羧基则未配位。trans-DAM-(i)和(ii)连接Sm(Ⅲ)构成在ab平面的二维层状结构。
The complex of Sm (Ⅲ) with the inner salt of N, -N’-diacetoxyimidazole (molecular formula: HOOCCH_2 (C_3H_3N_2) + CH_2COO- and abbreviated HDAM) {{Sm (H_2O) _2] NO_3 · 3H_2O} n (1). That is, the selected metal salt and ligand are dissolved in an appropriate solvent at a certain ratio, allowed to stand at ambient temperature and volatilized, and the complex slowly crystallizes out. The compound belongs to triclinic system with a = 8.509 (2) , b = 10.847 (2) , c = 13.440 (3) , α = 81.39 (3) °, β = 74.79 (3) °, γ = 79.81 (3) °, V = 1 171.2 (4) ~ 3, Z = 2 and Dc = 1.896 mg / = 666, R1 = 0.1068, wR_2 = 0.285 0. At the same time, compound 1 was characterized by IR, UV-Vis and fluorescence spectroscopy. In the structure of the compound, trans-DAM- (i) takes the μ4-mode and both carboxyl groups show the coordination of μ_2-η ~ 1: η ~ 2; ~ 0: η ~ 1 is connected, the other carboxyl is not coordinated. The trans-DAM- (i) and (ii) attached Sm (III) form a two-dimensional layered structure in the ab plane.