Study of Synthesis and Spectroscopic Characterization of Some Water Soluble Zn(II) Complexes with Substituted N, N- donor Ligands Derived from Pyridine-2-Carbaldehyde

 The synthesis and physiochemical characterisation of a series of four reported zinc complexes with substituted N,N- donor ligands, viz. Ln = (E)-N-(pyridin-2-ylmethylene) anilines with compositions [Zn(NO3)2(L1)](1), [Zn(NO3)2L2] (2), [Zn(NO3)2L3] (3), and [Zn(NO3)2L4] are highlighted in this (4). UV-visible, fluorescence, IR, and 1H NMR spectral analyses were used to investigate the complexes’ spectroscopic properties. In solution, all of the complexes were water soluble and non-electrolytes. It was impossible to obtain single crystals sufficient for X-ray crystal structure analysis to identify the geometry and structure of the complexes. All of the complexes were predicted to have octahedral geometry (1-4) based on spectrum investigations and comparable Zinc(II) nitrate compounds previously reported. Monodentate (1) or bidentate (2-4) coordination of the nitrate ion to zinc complexes. All of the complexes had a (pi)-(pi)* (intra-ligand) transition in their emission spectra, and Zn compounds had a very low fluorescence quantum yield, indicating that they were weak emitters at ambient temperature.

Author(s) Details:

Sajal Kundu,
Department of Chemistry, National Institute of Technology Agartala, Jirania, 799 046, India.

Keisham Surjit Singh,
Department of Chemistry, Manipur University, Canchipur, 795003, India.

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