title: Topological studies of three related metal-organic frameworks of GdIII and 5-nitroisophthalate.
abstract: The reaction of 5-nitroisophthalic acid (H(2)NIA) with Gd(NO(3))(3)·6H(2)O in DMF afforded three new metal-organic frameworks: [Gd(NIA)(1.5)(DMF)(2)]·DMF (I), [Gd(2)(NIA)(3)(DMF)(4)]·xH(2)O (II) and [Gd(4)(NIA)(6)(DMF)(5.5)(H(2)O)(3)]·4DMF·H(2)O (III). These compounds can be prepared through a variety of methods. Compounds (I) and (II) are more reproducibly formed than compound (III). Network analysis revealed (I) to have a (4(12).6(3))-pcu topology, while (II) displays a (4(2).8(4))(4(2).8(4))-pts topology. Compound (III) was found to present the uncommon 4,5,6T11 topological net, which combines aspects of both the pcu and pts topologies. The short symbol of this net is (4(4).6(2))(4(6).6(4))(2)(4(8).6(6).8).
authors.affiliation: Centre for Supramolecular Chemistry, Department of Chemistry, University of Cape Town, Rondebosch, Cape Town 7701, South Africa.
authors.forename: Kate
authors.initials: K
authors.lastname: Davies
authors.forename: Susan A
authors.initials: SA
authors.lastname: Bourne
authors.forename: Lars
authors.initials: L
authors.lastname: Ohrström
authors.forename: Clive L
authors.initials: CL
authors.lastname: Oliver