• Jayaraman Dessingiou

      Articles written in Journal of Chemical Sciences

    • Chemosensing ability of hydroxynaphthylidene derivatives of hydrazine towards Cu2+: Experimental and computational studies

      Jayaraman Dessingiou Jayshree K Khedkar Chebrolu P Rao

      More Details Abstract Fulltext PDF

      2-Hydroxynaphthylidene derivatives of hydrazine, namely L1, L2 and L3, were synthesized by going through two-step reactions and the products were characterized. The ion recognition properties of these receptors were studied using fluorescence and absorption spectroscopy. The receptors were found to be sensitive and selective towards Cu2+ in methanol solution among the 13 metal ions studied, namely Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, Hg2+, Pb2+, Na+, K+, Ca2+ and Mg2+, by exhibiting switch off fluorescence. The stoichiometry of the complexed species was found to be 2:1. The fluorescence quenching with Cu2+ is in the order of L1 > L2 > L3. These conjugates were also found to act as colorimetric sensors for Cu2+ in solution by exhibiting visual colour change. The 2:1 complex shows a centrosymmetric structure based on DFT computations.

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