Synthesis, structure and properties of a novel Cu(II)-MOF {[Cu2L(OH)]·DMF}n based on a semi-rigid polycarboxylic acid ligand.

A new Cu(II)-MOF {[Cu 2 L(OH)]·DMF} n (1) with an intriguing three-dimensional MOF based on infinite rod-shaped SBUs has been synthesized by H 3 L and Cu(Ac) 2 ·H 2 O under solvothermal condition. • A new Cu(II)-MOF {[Cu 2 L(OH)]·DMF} n (1) has been synthesized by H 3 L and Cu(Ac) 2 ·H 2 O under solvothermal condition. • The structure analysis reveals that compound 1 is an intriguing three-dimensional MOF based on infinite rod-shaped SBUs. • PXRD, TG analysis, UV–vis absorption spectrum and magnetic property of 1 have been also investigated. Metal-organic frameworks (MOFs) are coordination polymers with potential voids constructed by organic ligands and metal ions. In this work, we employed a semi-rigid polycarboxylic acid ligand 5-(4-carboxyphenoxy)methyl)benzene-1-thio-3-dicarboxylic acid (H 3 L) with the flexible "–CH 2 -O-" group between the two phenyl groups to construct a new Cu(II)-MOF {[Cu 2 L(OH)]·DMF} n (1). The structure analysis reveals that the adjacent Cu(II) cations are bridged by oxygens from OH– anion and carboxy group to get a one dimensional infinite rod-shaped secondary building unit (SBU). Furthermore, compound 1 exhibits an intriguing three-dimensional MOF based on infinite rod-shaped SBUs and L3-. PXRD result shows compound 1 is still stable after placed in air for three months. The variable-temperature magnetic studies indicate antiferromagnetic behaviors of 1. [ABSTRACT FROM AUTHOR]