A trimanganesecluster-based 2D layer framework with facile single-crystal-to-single-crystal transformation to afford a 1D chain structure

Abstract

A new isophthalate manganese(II) coordination polymer, [Mn₃(ip)₃(bipy)₂]_n·2nH₂O (1) (H₂ip = isophthalic acid and bipy = 2,2′-bipyridine), with a 2D layer structure built up from isophthalato-linking trimanganese clusters, is obtained by refluxing a weakly basic solution containing bipy, Mn(OAc)₂·4H₂O, H₂ip, and triethylamine. Both the complex and the dehydrated materials show irreversible water adsorption at room temperature, accompanied by facile single-crystal-to-single-crystal structural transformation forming a 1D chain-like coordination polymer upon rehydration, [Mn(ip)(bipy)(H₂O)₂]_n·nH₂O (2). The thermogravimetric behavior and magnetic properties of both the complexes are examined.