Formation of a 1-D metal–water chain and a 2-D water–sulfate layer containing cyclic water octamers in a 3-D supramolecular network

Abstract

A new tetranuclear complex, {[Cu(phen)(OH)]₄(H₂O)₂} · (SO₄)₂ · 8H₂O (1) (phen  =  1,10-phenanthroline), has been synthesized and characterized by elemental analysis, UV-Vis, IR, TG, and single-crystal X-ray diffraction. Complex 1 exhibits a 3-D supramolecular network with a 1-D metal–water chain consisting of tetranuclear hydroxo-bridged copper(II) clusters and water octamers and a 2-D water–sulfate layer containing cyclic water octamers with five types of O–H ··· O hydrogen-bonding motifs. The free ligand and its complex were screened for antibacterial activity against Gram-positive and Gram-negative bacteria.

Keywords:

• Supramolecular network
• Cyclic water octamers
• Metal–water chain
• Water–sulfate layer

Acknowledgments

This study was supported by the Natural Science Foundation of China (grant no. 20961007), the Aviation Fund (grant no. 2010ZF56023) and the Young Scientists Program of Jiangxi Province (grant no. 2008DQ00600).