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Spectrochim Acta A Mol Biomol Spectrosc. 2013 Feb;102:263-8. doi: 10.1016/j.saa.2012.10.010. Epub 2012 Oct 29.

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

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Department of Chemistry, Annamalai University, Annamalainagar 608 002, India.


(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 (13)C NMR spectrum, complex 1 showed a single low-field resonance associated with back bone carbon of dithiocarbamate (N(13)CS(2)) 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.

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