Synthesis, characterization, fluorescence and antibacterial activity of the Re(VII) complex [ReO3(phen)(H2PO4)] ·H2O

Abstract

Single crystals of a Re(VII) complex, the dihydrogenophosphato phenanthroline trioxo-rhenium monohydrate of formula [ReO3(phen) (H2PO4)]·H2O (phen= 1,10-phenanthroline) , were prepared in aqueous solution. X-Ray analysis shows that it crystallizes in the monoclinic space group P21/c with the unit cell parameters: a = 8.611(2), b= 13.881(2), c= 14.502(4) Å, β = 120.87(2)°, V = 1487.9(6) Å3 and Z = 4. In the neutral complex, the rhenium is in the oxidation state +VII, coordinated by two nitrogen atoms of the bidentate phen, three terminal oxygen atoms and, for the first time, one oxygen atom of the mono-deprotonated phosphoric acid ligand H2PO4-, forming a squarebased bipyramidal coordination geometry. The thermal stability, IR, UV/Vis and fluorescence spectroscopic properties are given. The complex shows antimicrobial activity against five different microbes. © 2012 Verlag der Zeitschrift fur Naturforschung,.