(2,2 '-bipy)[In-2(OH)(2)(H2O)](SO4)(2): The first indium sulfate with a layer structure

摘要

The first indium sulfate coordination complex, (2,2'-bipy)[In-2(OH)(2)(H2O)](SO4)(2) (2,2'-bipy = 2,2'-bipyridyl) was hydrothermally synthesized and characterized by single-crystal X-ray diffraction (XRD), the powder XRD, elemental analysis, inductively coupled plasma (ICP) analysis, thermogravimetric analysis (TGA), IR spectroscopy and fluorescent spectroscopy. It is noteworthy that this compound exhibits a novel two-dimensional layer structure, which is built up from two distinct motifs, a butlerite-type chain and a single 4-ring (S4R) unit. The adjacent layers are stably packed together and extended into three-dimensional supramolecular arrays via pi-pi stacking interactions of the 2,2'-bipy ligands. Additionally, this compound shows strong fluorescent property at room temperature, which may be assigned to ligand-centered pi*-pi transitions. (C) 2008 Elsevier Inc. All rights reserved.