Benzimidazole-Chalcone: A Selective Intramolecular Charge-transfer Probe for Biologically Important Zinc Ions


Benzimidazole–chalcone 3 functions as an optical probe on the basis of intramolecular charge-transfer (ICT) interaction involving bi-dentate chelation. Dramatic changes were observed both in the UV–vis and fluorescence behaviors of 3 in the presence of Zn2+, while other metal ions e.g. Li+, Na+, K+, Ca2+, and Mg2+ produced relatively insignificant optical changes.


  • Chemistry Letters

    Chemistry Letters 35 (7), 786-787, 2006

    The Chemical Society of Japan

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