New strontium phenylphosphonate: synthesis and characterization

摘要

New strontium phenylphosphonate dihydrate with formula SrC_6H_5PO_3 centre dot 2H_2O was prepared and characterized by elemental analysis, TGA, and powder XRD. The compound crystallizes in an orthorhombic system with cell parameters a = 14.280(2), b = 8.608(1), c = 7.918(1) A and a space group P222_1 (No. 17). A thermal behavior of SrC_6H_5PO_3 was studied and powder XRD patterns and cell parameters of compounds obtained by its dehydration, that is SrC_6H_5PO_3 centre dot 2H_2O and SrC_6H_5PO_3 centre dot 2H_2O are described. The infrared spectra of SrC_6H_5PO_3 centre dot 2H_2O are discussed and compared with the spectra of phenylphosphonic acid, SrC_6H_5PO_3 and SrC_6H_5PO_3 A transformation of SrC_6H_5PO_3 centre dot 2H_2O into Sr(C_6H_5PO_3H)_2 in an acid medium and an opposite transformation of Sr(C_6H_5PO_3H)_2 into SrC_6H_5PO_3 centre dot 2H_2O in a basic medium were also investigated.