A novel heteropolyoxometalate, Nb-substituted hexatungstate compound; (C 9 H 8 N) 3 [NbW 5 O 19 ]Á3H 2 O triquinolinium l 6 -oxido-dodeca-l 2 -oxidohexaoxido[niobium(V)pentatungsten(VI)]ate trihydrate (QNbW5) has been grown by slow evaporation method and characterized by powder X-ray and single-crystal XRD methods, NMR, IR, UV-Vis and photoluminescence spectroscopy measurements, elemental analysis and thermogravimetric analysis. Single-crystal XRD analyses show that QNbW5 crystallizes in the triclinic space group P1 and its crystal structure consists of 3D grid-like network of components in a close connection through N-HÁÁÁO, C-HÁÁÁO and offset pÁÁÁp stacking interactions between neighboring rings of quinolinium moieties. Moreover, the spectroscopic and electronic properties of QNbW5 have also been investigated showing a considerable important gap energy well confirming the semiconductor behavior and the blue photoluminescent property of reported material. In addition, the complex shows promising antimicrobial activity against four pathogenic microbes in comparison with its components alone.Electronic supplementary material The online version of this article (

No abstract

Single crystals of a Re(VII) complex, the dihydrogenophosphato phenanthroline trioxo-rhenium monohydrate of formula [ReO 3 (phen)(H 2 PO 4 )]·H 2 O (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)Å, β = 120.87(2) • , V = 1487.9(6)Å 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 2 PO − 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.

No abstract