Synthesis, characterization, fluorescence and antibacterial activity of the Re(VII) complex [ReO _3(phen)(H _2PO _4)] ·H _2O

摘要

Single crystals of a Re(VII) complex, the dihydrogenophosphato phenanthroline trioxo-rhenium monohydrate of formula [ReO _3(phen) (H _2PO _4)]·H _2O (phen= 1,10-phenanthroline), were prepared in aqueous solution. X-Ray analysis shows that it crystallizes in the monoclinic space group P2 _(1/c) with the unit cell parameters: a = 8.611(2), b= 13.881(2), c= 14.502(4) ?, β = 120.87(2)°, V = 1487.9(6) ? ~3 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 H _2PO _(4-), 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.