Hydrothermal Synthesis, Crystal Structure and Thermal Property of a Coordination Polymer Constructed by Ce(Ⅲ) and Succinate Ions

摘要

A new three-dimensional coordination polymer [Ce2(C4H4O4)3(H2O)2]n·3.2nH2O,constructed by Ce(Ⅲ) ion and succinate ion and lattice water molecules has been synthesized under hydrothermal conditions.It crystallizes in triclinic system,space group P(i) with a =7.8865(6),b =12.0260(8),c =12.2598(9) (A),a =112.456(2)°,β =90.046(2)°,γ =100.423(2)°,Mr=722.14,V =1053.73(13) (A)3,Z =2,Dc =2.276 g/cm3,t =4.35/mm,F(000) =696,GOF =1.029,R =0.0203 and wR =0.0570.The asymmetric unit contains two Ce3+ cations and both of them are nine-coordinated and their coordination geometries can be described as two distorted monocapped square antiprisms.In the title compound,a three-dimensional coordination network with one-dimensional hexagon honeycomb-like channels along the a axis is generated.TG measurement has been carried out,and its result analysis along with the powder XRD determination indicates the residue to be CeO2·