Synthesis and structure characterization of two new one-dimensional reduced molybdenum(V) phosphates with covalently bonded transition metal complexes

摘要

Two new one-dimensional reduced molybdenum (V) phosphates, [Zn(phen)(2)] [Zn(phen)(2)(H2O)] [Zn(HPO4)(8)](MoO2)(6)(OH)(3)](2)] (.) H2O (1) and [Co(phen)(3)][Co(phen)(2)(H2O)(H2PO4)][KNa(H2O)(2)][Co(H2O)(2)][Co(phen)(2)][Co(H2PO4)(2)(HPO4)(3)(PO4)(3)](MoO2)(6)(OH)(3)](2)](.)5H(2)O (2) (phen= 1,10-phenanthroline), have been synthesized and characterized by elemental analyses, IR, TG, and single crystal X-ray diffraction. Compound 1 is built up of Zn[P4Mo6](2) cluster as the structural motif covalently linked by [Zn(phen)(2)] Complex subunits to yield unusual one-dimensional chains, which are further in close contact forming two-dimensional supramolecular layers via pi-pi stacking interactions. In compound 2, Co[P4Mo6](2) clusters are connected by [Co(phen)(2)], [Co(H2O)(2)] and [KNa(H2O)(2)] fragments through covalent bonds, forming an unusual one-dimensional chain. Interestingly, both [Co(phen)(3)] complex and [Co(phen)(2)(H2O)(H2PO4)] cobalt phosphate are presented as charge-compensating cations and contact each other via pi-pi stacking interactions to form a supramolecular chain, then the supramolecular chains link two neighboring chains that contain [P4Mo6] Via hydrogen-bonding interactions to form a two-dimensional supramolecular layer. Furthermore, the fluorescent activity of compound 1 is reported. (c) 2006 Elsevier B.V. All rights reserved.