Synthesis, structure and photocatalytic properties of an unusual tetranuclear copper(II) coordination polymer

Abstract

An unusual coordination polymer [Cu4(OH)2(otrb)2(sip)2]n (1) was synthesized by the hydrothermal method (otrb=1,2-bis(1,2,4-triazol-4-ylmethyl)benzene, sip=5-sulfoisophthalate). The tetranuclear copper(II) clusters [Cu4(OH)2] are bridged by the double sip and double otrb ligands to form an unusual 2D sql network. The adjacent 2D networks parallel interpenetrate each other to form intriguing 2-fold interpenetrated network. The photocatalytic degradation rates of methyl orange (MO), methylene blue (MB) and rhodamine B (RhB) are 94.4%, 91.2% and 86.6% at 180min using photocatalyst 1. 1 is a highly efficient and universal photocatalyst for the degradation of the organic dyes.