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

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.

• Authors: Xiao-Dan Zheng, Mei Zhang, Long Jiang, Tong-Bu Lu
• Journal: Dalton transactions (Cambridge, England : 2003) (Dalton Trans) Vol. 41 Issue 6 Pg. 1786-91 (Feb 14 2012) ISSN: 1477-9234 [Electronic] England
• PMID: 22159167 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Carboxylic Acids
• Ligands
• Organometallic Compounds
• Europium

Topics

• Carboxylic Acids (chemistry)
• Crystallography, X-Ray
• Europium (chemistry)
• Ligands
• Luminescence
• Models, Molecular
• Organometallic Compounds (chemistry)