Construction of three coordination polymers based on tetranuclear copper(II) clusters: syntheses, structures and photocatalytic properties

摘要: Three intriguing metal-cluster based coordination polymers (MCOFs) {[Cu4(OH)2(itp)2(btc)2(H2O)4][Cu(H2O)4(Hbtc)]2·4H2O}n (1), {[Cu4(OH)2(itp)2(btc)2]·2EtOH·2H2O}n (2) and {[Cu4(OH)2(itp)2(sip)2(H2O)4]·4H2O}n (3) were synthesized by the reaction of 1-imidazol-1-yl-3-(1,2,4-triazol-4-yl)propane (itp), 1,3,5-benzenetricarboxylate (btc) or 5-sulfoisophthalate (sip) CuCl2 using a hydrothermal method. 1 consists an unprecedented (3,4)-connected 2D network on tetranuclear copper(II) clusters [Cu4(μ3-OH)2] Cu1 cores with Schlafli symbol (62·8)2(6·84·10) → 3D polythreaded motif. 2 shows unusual (3,10)-connected cluster (3·4·5)2(34·46·510·615·710). 3 exhibits (4,4) [Cu4(μ3-OH)2]. 1–3 are semiconducting in nature, Eg 2.29 eV 2.27 2.39 (3). universal highly efficient photocatalysts for degradation organic dyes such as methyl orange (MO), methylene blue (MB) rhodamine B (RhB) under UV irradiation, very stable easily separated from system reuse.