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Can zinc(II) ions be doped into the crystal structure of L-proline cadmium chloride monohydrate?
1Department of Chemistry, Goa University, Goa 403206, India.
Abstract:
The bivalent metals Cd(II) and Zn(II) exhibit different stereochemical requirements for the set of chloride and L-proline ligands, which precludes the doping of Zn(II) ions into the crystal structure of dichloro(l-proline)cadmium(II) hydrate also referred to as L-proline cadmium chloride monohydrate (L-PCCM). Hence, the reported claim of growth of zinc doped L-PCCM crystals namely Zn(0.4 mol):LPCCM and Zn(0.2 mol):LPCCM by Vetrivel et al. (S. Vetrivel, P. Anandan, K. Kanagasabapathy, S. Bhattacharya, S. Gopinath, R. Rajasekaran, Effect of zinc chloride on the growth and characterization of l-proline cadmium chloride monohydrate semiorganic NLO single crystals, Spectrochim. Acta 110A (2013) 317-323), is untenable.
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