一对 3D 同手性金属-有机骨架：自发拆分、单晶-单晶转变和选择性吸附性能。

A pair of 3D homochiral metal-organic frameworks: spontaneous resolution, single-crystal-to-single-crystal transformation and selective adsorption properties.

机构信息

MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.

出版信息

Dalton Trans. 2012 Feb 14;41(6):1786-91. doi: 10.1039/c1dt11825k. Epub 2011 Dec 12.

DOI:10.1039/c1dt11825k

PMID:22159167

Abstract

A novel achiral hexacarboxylic ligand L was synthesized. Spontaneous resolution occurred during the reaction of L with Eu(NO(3))(3) to produce a pair of enantiomers of 1a and 1b with a formula of [EuL(NO(3))(3)(H(2)O)]·13H(2)O, which possesses 1D chiral open channels formed by triple-stranded helical chains. When heated to 60 °C, 1a releases coordinated and partial lattice H(2)O molecules to give a complex of [EuL(NO(3))(3)]·4H(2)O (1a'), accompanied by a single-crystal-to-single-crystal transformation from 1a to 1a', with the space group changing from P2(1) to P3(1)2. The dehydrated 1 can selectively adsorb water over organic solvents and exhibits reversible water adsorption upon dehydration and hydration.

摘要

一种新型的手性六羧酸配体 L 被合成。L 与 Eu(NO3)3 反应时发生自发拆分，生成一对对映异构体 1a 和 1b，其化学式为[EuL(NO3)3(H2O)]·13H2O，具有由三股螺旋链形成的 1D 手性开放通道。当加热至 60°C 时，1a 释放出配位和部分晶格 H2O 分子，得到配合物[EuL(NO3)3]·4H2O(1a')，同时伴随着从 1a 到 1a'的单晶到单晶转变，空间群从 P2(1)变为 P3(1)2。脱水的 1 可以选择性地吸附水而不是有机溶剂，并在脱水和水合时表现出可逆的水吸附。