Syntheses, Structures, and Photoluminescent Properties of Two Zn(Ⅱ) Coordination Polymers with Helical Chains Structures

摘要

Two novel coordination polymers with helical chains,{[Zn(L)(H2O)]·H2O}n (1)and {[Zn(L)(p-bix)]·3.5H2O}n (2),where H2L =5-(4-hydroxypyridinium-1-ylmethyl) isophthalic acid and p-bix =1,4-bis(imidazol-1-ylmethyl)benzene,have been hydrothermally synthesized,and charac-terized by elemental analysis,powder X-ray diffraction (PXRD),IR,thermal gravimetric analyses (TGA) and also by single-crystal X-ray diffraction.Both complexes 1 and 2 crystallize in monoclinic,space group P21/c.Compound 1 displays a two-dimensional (2D) structure with two distinct types of helical chains;2 shows a layered coordination polymer with two types of helical chains and features an interesting 2D→3D interdigitated architecture.Meanwhile,the luminescent properties of 1 and 2 have also been investigated in detail.