pH-value-controlled assembly of photoluminescent zinc coordination polymers

摘要

By pH-value adjustment, the reactions of zinc salt, 1,3,5-benzenetricarboxylic acid (H(3)btc) and 4,4'-bipyridine (bpy) yield three coordination polymers, formulated as [Zn-3(btc)(2)(bpy)(H2O)(2)](n) (1), [Zn(Hbtc)(bpy)(H2O)](n) center dot 3nH(2)O (2) and [Zn(Hbtc)(bpy)(H2O)](n). 4nH(2)O (3), respectively. The structure of 1 is a 3D network containing channels filled with bpy ligands. Compound 2 consists of twofold interpenetrating (10,3)-b networks, while compound 3 is a 2D layer structure. The fluorescent studies reveal that they exhibit intense violet luminescence in solid state. (c) 2005 Elsevier B.V. All rights reserved.