Issue 19, 2014

Supramolecular interactions induced hinge-like motion of a metal–organic framework accompanied by anisotropic thermal expansion

Abstract

A novel three-dimensional metal–organic framework (MOF), Ag4(tpt)4{δ-[Mo8O26]}·1.5H2O (A) (tpt = 2,4,6-tris(4-pyridyl)-1,3,5-triazine), possesses a ths-type topology with the hinge deformation mode. The single-crystal X-ray diffraction study shows that A and the dehydrated phase Ag4(tpt)4{δ-[Mo8O26]} (B) display distinct anisotropic thermal expansion with expansion in the b direction but contraction in the ac plane. This rare area negative thermal expansion (NTE) behavior is attributed to the hinged structure model and the supramolecular interactions (argentophilic interaction, π–π interaction) that act as the microscopic driving forces. In addition, supramolecular interactions also play a key role in thermochromic behavior of compound A.

Graphical abstract: Supramolecular interactions induced hinge-like motion of a metal–organic framework accompanied by anisotropic thermal expansion

Supplementary files

Article information

Article type
Paper
Submitted
20 Dec 2013
Accepted
03 Mar 2014
First published
03 Mar 2014

Dalton Trans., 2014,43, 7146-7152

Supramolecular interactions induced hinge-like motion of a metal–organic framework accompanied by anisotropic thermal expansion

L. Zhang, X. Kuang, X. Wu, W. Yang and C. Lu, Dalton Trans., 2014, 43, 7146 DOI: 10.1039/C3DT53580K

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