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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/124/06/1255-1260

    • Keywords

       

      Organometallic bioconjugates; Cu(II) cation sensor; chromogenic and electrochemical chemosensor.

    • Abstract

       

      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.

    • Author Affiliations

       

      Arunabha Thakur1 Sinjinee Sardar1 Sundargopal Ghosh1

      1. Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India

    • Dates

       
      Published
      November 2012

    • Supplementary Material

       

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