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    • Sinjinee Sardar

      Articles written in Journal of Chemical Sciences

    • Volume 124 Issue 6 November 2012 pp 1255-1260

      Click-generated triazole based ferrocene-carbohydrate bioconjugates: A highly selective multisignalling probe for Cu(II) ions

      Arunabha Thakur Sinjinee Sardar Sundargopal Ghosh

      More Details Abstract Fulltext PDF

      Two Cu2+-specific colorimetric sensors, based on ferrocene-carbohydrate bioconjugates, 2, C46H56O20N6Fe and 3, C28H33O10N3Fe were designed and synthesized in good yields. Both the compounds, 2 and 3, behave as very selective and sensitive chromogenic and electrochemical chemosensor for Cu2+ ion in aqueous environment (CH3CN/H2O (2:8, $v/v$). The analytical detection limit (ADL) for receptor 2 was $7.5 \times 10^{−7}$ M. The considerable changes in their absorption spectra of 2 and 3 are accompanied by the appearance of a new low energy (LE) peak at 630 nm (2: $\epsilon = 1600$ M-1 cm-1 and 3: 822 M-1 cm-1). This is further accompanied by a strong colour change from yellow to dark green that allows the prospective for `naked eye’ detection of Cu2+ ion.

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