三维稀土配位聚合物[Ce2(H2btc)(btc)(H2O)2]n的水热合成与晶体结构

含有稀土元素的无机一有机配位聚合物因在光、电、磁及催化等方面具有潜在的应用价值而引起人们的关注．芳香多羧基有机配体在合成配位聚合物和多维超分子研究领域中扮演着重要角色．1，2，4，5-均苯四甲酸(H4btc)由于具有独特的配位能力(btc^4-最多可作为八齿配体)和空间特性，

Hydrothermal Synthesis.and Crystal Structure of a 3D Rare-earth Coordination Polymer [Ce2 (H2btc) (btc) (H2O) 2]n

A new 3D rare-earth coordination polymerCe2(H2btc)(btc)(H2O)2]n (1) was hydrothermally synthesized and its structure was characterized by the single crystal X-ray diffraction. Compound 1 crystallizes in a triclinic crystal system,space group P 1 with a=0.641 17(13) nm, b= 0.939 41(19) nm, c=0.957 97(19) nm, α =103.888(17)°, β =74.57(3)°, γ =76.71(3)°, V= 0.540 98(19) nm3, Z=1, R= 0.026 4,wR2=0.077 9. The three-dimensional compound 1 is built by linking one crystallographically independent nine-coordination Ce(Ⅲ) subunit through the btc and the H2btc ligands. Each nine-coordinate Ce(Ⅲ) unit is a distorted tricapped trigonal prism,of which eight oxygen atoms belong to six different carboxylate groups of btc or H2btc and a water molecule,with the Ce(Ⅲ)—O bond lengths ranging from 0.240 3(3) nm to 0.263 6(3) nm.