Ushak Svetlana, Spodine Evgenia, Le Fur Eric, Venegas-Yazigi Diego, Pivan Jean-Yves, Schnelle Walter, Cardoso-Gil Raul, Kniep Rüdiger
Centro para la Investigación Interdisciplinaria Avanzada en Ciencia de los Materiales, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago, Chile.
Inorg Chem. 2006 Jul 10;45(14):5393-8. doi: 10.1021/ic060152g.
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).
通过水热合成法得到了两种新型有机/无机杂化的铜氧钒二膦酸盐[Cu2(phen)2(O3PCH2PO3)(V2O5)(H2O)]·xH2O (1)和[(Cu2(phen)2(O3P(CH2)3PO3)(V2O5)]·xC3H8 (2)。这些化合物为单斜晶系，它们分别在空间群P2(1)/n中结晶，晶胞参数为a = 11.788(2) Å，b = 17.887(3) Å，c = 14.158(2) Å，β = 93.99(0)°；以及在空间群C2/c中结晶，晶胞参数为a = 11.025(1) Å，b = 18.664(2) Å，c = 15.054(2) Å，β = 90.06(0)°。两种化合物均呈现二维骨架结构，由通过铜四聚体（对于(1)）和铜二聚体（对于(2)）连接的角共享钒四面体和二膦酸盐基团的无限链构成。(2)的显著特征是丙烷分子的封装，通过层间强氢键得以稳定。对这些化合物的磁性进行了研究，结果表明(1)具有反铁磁耦合，Tmax = 64 K，而(2)表现出类似居里顺磁行为。
