由无限棒状二级结构单元和柔性配体构建的镧系配位聚合物。

Lanthanide coordination polymers constructed from infinite rod-shaped secondary building units and flexible ligands.

作者信息

Lü Jian, Bi Wen-Hua, Xiao Fu-Xian, Batten Stuart R, Cao Rong

机构信息

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou 350002, China.

出版信息

Chem Asian J. 2008 Mar 7;3(3):542-7. doi: 10.1002/asia.200700276.

DOI:10.1002/asia.200700276

PMID:18161741

Abstract

Three lanthanide coordination polymers constructed from infinite rod-shaped secondary building units (SBUs), [Nd(2)(H(2)O)(2)(cis-chdc)(2)(trans-chdc)]2H(2)O (1), Nd(2)(H(2)O)(4)(trans-chdc)(3) (2), and [Sm(2)(H(2)O)(2)(cis-chdc)(trans-chdc)(2)]4H(2)O (3) (chdcH(2)=1,4-cyclohexanedicarboxylic acid), were hydrothermally synthesized and structurally characterized. The structures of 1-3 are modulated by different ratios of the cis and trans configurations of chdc(2-) ligands, which was achieved by temperature control in the hydrothermal reactions. Crystal-structure analysis revealed that 1 is a four-connected pcu-type rod packing network built from cross-linking of rod-shaped neodymium-oxygen SBUs by cis- and trans-chdc(2-) ligands in a 2:1 ratio, 2 displays a complicated six-connected hex-type rod packing structure built by connection of rod-shaped neodymium-oxygen SBUs and trans-chdc(2-) ligands, and 3 features an unprecedented five-connected rod packing pattern constructed from rod-shaped samarium-oxygen SBUs and cis- and trans-chdc(2-) ligands in a 1:2 ratio.

摘要

通过水热合成法制备并对结构进行了表征，得到了三种由无限长棒状二级结构单元（SBUs）构筑的镧系配位聚合物，分别为[Nd(2)(H(2)O)(2)(顺式-chdc)(2)(反式-chdc)]2H(2)O (1)、Nd(2)(H(2)O)(4)(反式-chdc)(3) (2) 和 [Sm(2)(H(2)O)(2)(顺式-chdc)(反式-chdc)(2)]4H(2)O (3)（chdcH(2)=1,4-环己烷二甲酸）。1-3的结构受chdc(2-)配体顺式和反式构型不同比例的调控，这是通过水热反应中的温度控制实现的。晶体结构分析表明，1是一种由棒状钕-氧SBUs通过顺式和反式-chdc(2-)配体以2:1比例交联构建的四连接pcu型棒堆积网络，2呈现出由棒状钕-氧SBUs和反式-chdc(2-)配体连接构建的复杂六连接hex型棒堆积结构，3具有一种前所未有的五连接棒堆积模式，由棒状钐-氧SBUs和顺式和反式-chdc(2-)配体以l:2比例构建而成。