Temperature-controlled solvothermal syntheses, structures and characterizations of a novel class of Zn complexes constructed from 1,4-bis[2-(5-phenyloxazolyl)]benzene

Three novel complexes, (ZnCl2(H2O)(POPOP).POPOP) (1), [ZnCl2(POPOP)](n) (2), and {Zn-2(CH3COO)(POPOP)(1.5)Cl-3}(n) (3) {POPOP = 1,4-bis[2-(5-phenyloxazolyl)]benzene}, of zinc-POPOP coordination polymers have been obtained from an identical starting mixture using temperature as the only independent variable. Complexes 1-3 all crystallize in the triclinic P! space group, but their Zn-II centers adopt different coordinations. Complex 1 consists of POPOP-coordinated zinc units and discrete POPOP molecules, 2 features an interesting zigzag chain structure, and 3 consists of unique ladder-like double-chains bridged by POPOP units. Furthermore, 1-3 display some different fluorescent emissions based on their different coordination architectures. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)