Preparation of ZnS nanosheets from (2,2′-bipyridine)bis(1,2,3,4-tetrahydroquinolinecarbodithioato-S,S′)zinc(II)

(2,2'-Bipyridine)bis(1,2,3,4-tetrahydroquinolinecarbodithioato-S,S')zinc(II), [Zn(thqdtc)(2)(2,2'-bipy)] (1) has been synthesized from bis(1,2,3,4-tetrahydroquinolinecarbodithioato-S,S')zinc(II), [Zn(thqdtc)(2)] ( 2) and characterized by elemental analysis, IR and NMR spectroscopy and single crystal X-ray analysis. In the C-13 NMR spectrum, complex 1 showed a single low-field resonance associated with back bone carbon of dithiocarbamate ((NCS2)-C-13) at 209.2 ppm. Single crystal X-ray analysis of 1 showed that the zinc ion is in a distorted octahedral environment of two nitrogen atoms and four sulfur atoms around it. The complex 1 has been used as single source precursor for the preparation of ZnS nanosheets via solvothermal method. The ZnS nanosheets have been characterized by powder XRD, EDAX, TEM, UV-Vis and fluorescence spectroscopy. TEM studies indicate that the nanosheets are very thin. The nanosheets obtained show quantum size effect in their UV-Vis absorption spectrum. The strong emission peak centered at 415 nm in fluorescence spectrum could be attributed to the electron-hole recombination from internal vacancies for Zn and S atoms. (C) 2012 Elsevier B.V. All rights reserved.