Sm与N,-N′-二乙酸基咪唑内盐配合物的合成结构和荧光性质  

The structure of synthesis and fluorescence properties of coordination polymers with Sm and imidazolium-N,-N′-diacetate

作　　者：黄桂珍[1] 

机构地区：[1]闽西职业技术学院,福建龙岩364021

出　　处：《闽西职业技术学院学报》2017年第1期116-120,共5页Journal of Minxi Vocational and Technical College

摘　　要：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。A new compound {[Sm （trans-DAM）2 （H2O）2]NO3·3H2O}n （1） was synthesized by selecting Sm（NO3）3 and imidazolium-N, N＇-diacetate （HDAM） in solvents （H2O） under the pH =3 at room temperature. By X-ray single crystal diffraction method, the compound belongs to triclinic crystal system, space group P-1 （α=8.509（2）A, b=10.847（2）A, c=13.440（3）A, a=81.39（3）°, β=74.79 （3）°, γ=79.81（3）°, V=1171.2（4）A3, Z=2, Dc=1.896 mg/m3, F（000）=666, R,=0.1068, wR2=0.2850）. At the same time, compound 1 based on the data from X-ray single-crystal diffraction was discussed. The structures and properties were characterized with the FTIR, UV-Vis DRIS, and fluorescence spectroscopy. In the structure of compound 1, trans-DAM-（i） took the μ4- coordination mode, with coordination mode μ1-η1：η2 at the two ends of carboxyl, while in trans-DAM-（ii） only one carboxyl connected μ1-η1：η2 Compound 1 showed a two dimensional layered structure in the ab plane by connecting trans-DAM-（i）, trans-DAn （ii） and Sm（Ⅲ）.

关 键 词：柔性多羧酸 稀土金属Sm（Ⅲ） 溶液法 荧光性质 

分 类 号：O614.33[理学—无机化学]