Synthesis, structure and third-order non-linear optical properties of tungsten dioxo complex with 8-hydroxyquinoline ligand WO2(C9H6NO)2

Tungsten dioxo complex WO2(C9H6NO)(2) was obtained via the low temperature solid-state reaction of (NH4)(2)WS4, 8-hydroxyquinoline(8-hq) and(CH3)(4)NI, and it was characterized by means of elemental analyses. IR spectroscopy and X-ray diffraction analysis. The crystal of the title compound belongs to monoclinic, space group C2/c, with the crystal cell parameters: a=1.3316(3) nm, b=0.94444(19) nm, c=1.3485(3) nm. beta=109.66(3)degrees, V=1.5970(6) nm(3), Z=6. The title compound possesses a supramoleecular structure formed through hydrogen bonds and pi-pi stacking interactions. The third-order non-linear optical (NLO) properties of the title compound were also investigated. The third-order non-linear absorption coefficient alpha(2) and refractive index n(2) are 0.85 X 10(-11) m/W-1 and -1.5 X 10(-19) m(2)/W, respectively. The third-order nonlinear susceptibility chi((3)) is 3.03 X 10(-13) esu for 3.8 X 10(-5) mol/L sample concentration.