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Virendra Kumar, Ajit Kumar, Uzra Diwan, Manish Kumar Singh, K K Upadhyay, Turn “Off–On” Fluorescent Recognition of Cu2+ and Cys in Aqueous Medium: Implementation of Molecular Logic Gate and Cell Imaging Studies, Bulletin of the Chemical Society of Japan, Volume 89, Issue 7, July 2016, Pages 754–761, https://doi.org/10.1246/bcsj.20150427
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Abstract
The present communication incorporates utilization of a simple Schiff base (RO) fruitfully for the turn “off-on” successive fluorescent recognition of Cu2+ and Cys in aqueous media. The single crystal of RO-Cu2+ ensemble revealed a binding pattern which ultimately leads to quenching of the green fluorescence of RO. Interestingly the quenched fluorescence of the RO-Cu2+ ensemble was revived selectively in the presence of Cys via Cu2+ displacement approach. The selective “off-on” behavior of RO towards Cu2+ and Cys was consequently used as inputs to build up an implication (IMP) logic gate. Moreover, the RO exhibited successful bio-imaging of Cu2+ and Cys also in E. coli cells.