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采用水热合成法合成了4例新颖的稀土配位聚合物:[Ln(PBDC)(HPBDC)(H2O)3](H2PBDC=对羧基苯氧乙酸;Ln=La(1),Pr(2),Nd(3))和[La2(PBDC)3(H2O)4](4).化合物1～3属同构,呈现一维链状结构,而化合物4呈现出复杂的三维结构.其中,化合物4是受化合物1的结构特点启发而设计合成的.在其他条件相同的情况下,加入有机碱2,2’-联吡啶使化合物1中羧基上的质子进一步脱去.这种微小的改变致使化合物1的结构发生了巨大变化,由一维链状结构转变为三维结构配位聚合物4.同时,还报道了这些化合物的紫外-可见光谱、热重和磁性等性质.
Four novel rare earth coordination polymers were synthesized by hydrothermal synthesis method: [Ln (PBDC) (HPBDC) (H2O) 3] (H2PBDC = p-carboxyphenoxyacetic acid; Ln = La (1) , Nd (3) and La2 (PBDC) 3 (H2O) 4] (4) .Compounds 1 to 3 are isomorphic, showing a one-dimensional chain structure, while compound 4 shows a complex three-dimensional structure. 4 was designed and synthesized on the basis of the structural characteristics of compound 1. Addition of the organic base 2,2’-bipyridine further deprotonated the protons of the carboxyl group in compound 1 under the same conditions. This slight change resulted in The structure of compound 1 changed greatly from one-dimensional chain structure to three-dimensional structure coordination polymer 4. At the same time, the UV-Vis spectra, thermogravimetric and magnetic properties of these compounds were also reported.