由4-甲基-1,2,3-噻二唑-5-甲酸(HL,C_4H_4N_2O_2S)和相应的稀土硝酸盐Ln(NO_3)3·n H_2O(Ln=Tb,Dy,Ho,Yb)合成了4个一维稀土配位聚合物{[Ln(L)_3(H_2O)2]·H_2O}_n(Ln=Tb,1;Dy,2;Ho,3;Yb,4),均得到单晶,用元素分析、红外光谱、热重分析和X射线单晶衍射确定了产物的组成和结构。结构分析表明:4种晶体属于异质同晶型,同属于三斜晶系,空间群为Pī。每个中心金属离子Ln(III)与5个噻二唑甲酸根中的6个羧基氧原子和2个配位水分子上的两个O原子配位,配位数为8,形成一个三角十二面配位多面体。 Synthesis of 4-methyl-1,2,3-thiadiazole-5-carboxylic acid (HL, C_4H_4N_2O_2S) and the corresponding rare earth nitrate Ln (NO_3) 3 · n H_2O (Ln = Tb, Dy, Ho, Yb) Four single-dimensional rare earth coordination polymers {[Ln (L) _3 (H_2O) 2] · H_2O} _n (Ln = Tb, 1; Dy, 2; Ho, 3; Yb, 4) The composition and structure of the product were confirmed by elemental analysis, IR, TG and X-ray single crystal diffraction. Structural analysis shows that the four kinds of crystals are heterogeneous isomorphic, belong to the triclinic system, space group Pī. Each central metal ion, Ln (III), coordinates with six carboxy oxygen atoms of five thiadiazole carboxylates and two O atoms of two coordinated water molecules with a coordination number of 8 to form a triangle of ten Two-sided coordination polyhedron.