Syntheses, structures and properties of two zinc coordination polymers based on bis(triazole) and sulfoisophthalate†
Abstract
Two zinc(II) coordination polymers {[Zn(tmtz)(H2O)4][Zn2(tmtz)2(sip)2]·3H2O}n (1) and [Zn3(tmtz)2(sip)2(H2O)4]·2H2O}n (2) (tmtz = 1,4-bis(1,2,4-triazol-1-ylmethyl)-2,3,4,5-tetramethylbenzene, sip = 5-sulfoisophthalate) were synthesized and structurally characterized. X-ray structural analysis shows that 1 is comprised of two distinct and crystallographically independent polymeric motifs polythreading together. The first motif of 1 is the (3,5)-connected 3D anionic network [Zn2(tmtz)2(sip)2]n2n− with point symbol of (42·6)(42·65·83). The second motif in 1 is the [Zn(tmtz)(H2O)4]n2n+ 1D cationic chain. A polythreading array was formed by a (3,5)-connected 3D anionic network and 1D cationic chains in 1. 2 exhibits a (3,4)-connected 2D network with point symbol of (42·8)(42·6·82·10) and constructs a 3D hydrogen bonding architecture. 1 and 2 are effective catalysts for the degradation of methyl orange in the presence of H2O2. The luminescence and thermal analyses are also performed.