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利用2,2’-(1,4-亚苯基)二(亚苯基)二(硫基)苯二羧酸(H_2L~1)和2,2’-(2,3,5,6-四甲基-1,4-亚苯基)二(亚甲基)二(硫基)苯二甲酸(H_2L~2)2个柔性二羧酸分別与镧系金属盐反应,通过溶剂热方法合成了3个配位聚合物:{[(NH_2(CH_3)_2[Nd(L~1)_2(DMF)]·2DMF}_n(1)和{[Ln(L~2)_(1.5)(H_2O)(DMF)_2]·2DMF}_n[Ln=Ce(2),Pr(3)]。利用元素分析、红外、粉末X射线衍射、热重分析等对配合物进行了表征。X射线单晶衍射分析表明:3个配合物均为二维的层状结构,并且2个配体在配合物中表现出不同的构象。(L~1)~(2-)在配合物1中表现出顺式和反式2种构象,(L~2)~(2-)在配合物2和3中仅表现出反式构象。此外,对配合物的热稳定性和荧光性质也进行了研究。
By using 2,2 ’- (1,4 - phenylene) bis (phenylene) bis (thio) benzene dicarboxylic acid (H_2L ~ Tetramethyl-1,4-phenylene) di (methylene) bis (thio) phthalic acid (H_2L ~ 2), two flexible dicarboxylic acids were reacted with lanthanide metal salts respectively and synthesized by solvothermal method Three coordination polymers were synthesized: {[(NH_2 (CH_3) _2 [Nd (L_1) _2 (DMF)] 2DMF} _n (1) and {[Ln (L_2) _ (1.5) (DMF) _2] · 2DMF} _n [Ln = Ce (2), Pr (3)]. The complex was characterized by elemental analysis, infrared, powder X-ray diffraction and thermogravimetric analysis. The results of diffraction analysis show that all the three complexes are two-dimensional layered structures, and the two ligands show different conformations in the complexes. (L ~ 1) ~ (2-) (L ~ 2) ~ (2-) showed only trans conformations in complexes 2 and 3. In addition, the thermal stability and fluorescence properties of the complexes were also investigated.