title: Two new hybrid organic/inorganic copper(II)-oxovanadate(V) diphosphonates: [Cu2(phen)2(O3PCH2PO3)(V2O5)(H2O)] x H2O and [Cu2(phen)2(O3P(CH2)3PO3)(V2O5)] x C3H8. Synthesis, structure, and magnetic properties.
abstract: Two new hybrid organic/inorganic copper oxovanadium diphosphonates [Cu2(phen)2(O3PCH2PO3)(V2O5)(H2O)] x H2O (1) and [(Cu2(phen)2(O3P(CH2)3PO3)(V2O5)] x C3H8 (2) have been obtained by hydrothermal synthesis. The compounds are monoclinic, and they crystallize in the space group P2(1)/n with cell parameters of a = 11.788(2) A, b = 17.887(3) A, c = 14.158(2) A, and beta = 93.99(0) degrees and in the space group C2/c with cell parameters of a = 11.025(1) A, b = 18.664(2) A, c = 15.054(2) A, and beta = 90.06(0) degrees, respectively. Both compounds present two-dimensional frameworks built up from infinite chains of corner-sharing vanadium tetrahedra and diphosphonate groups connected by copper tetramers for (1) and copper dimers for (2). The remarkable feature of (2) is the encapsulation of propane molecules, stabilized by strong hydrogen bonding between the layers. The magnetic properties of the compounds have been investigated showing antiferromagnetic coupling with Tmax = 64 K for (1) and Curie-like paramagnetic behavior for (2).
authors.affiliation: Centro para la Investigación Interdisciplinaria Avanzada en Ciencia de los Materiales, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago, Chile.
authors.forename: Svetlana
authors.initials: S
authors.lastname: Ushak
authors.forename: Evgenia
authors.initials: E
authors.lastname: Spodine
authors.forename: Eric
authors.initials: E
authors.lastname: Le Fur
authors.forename: Diego
authors.initials: D
authors.lastname: Venegas-Yazigi
authors.forename: Jean-Yves
authors.initials: JY
authors.lastname: Pivan
authors.forename: Walter
authors.initials: W
authors.lastname: Schnelle
authors.forename: Raul
authors.initials: R
authors.lastname: Cardoso-Gil
authors.forename: Rüdiger
authors.initials: R
authors.lastname: Kniep