Syntheses, structural characterization, and thermal behavior of cyanide-bridged [2 + 2]-type tetranuclear rectangle-based molecule constructed from Tm(III) and hexacyanocobaltate(III)

Abstract

A new zero-dimensional cyanide-based coordination complex consisting of hexacyanocobaltate(III)-based building block and Tm(III) has been synthesized and characterized through single-crystal X-ray analysis, elemental analysis, and TGA analysis. The complex comprises of the cyano-bridged bimetallic assembly, {[Tm(DMF)2(CH3OH)2(H2O)2(μ-CN)Co(CN)5]}2 (1). The neutral complex consists of two TmIII centers coordinated with DMF, aqua, and methanol groups and bridged via cyanide to two different [Co(CN)6]3− moieties. Each TmIII has a coordination number of eight and a square antiprismatic geometry. The structure was further proved by thermogravimetric analysis which indicates the formation of complex 1. Brilliant luminescence property of the complex makes it a suitable material for medicinal applications.