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Issue 58, 2015
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Benzimidazolium-based chemosensors: selective recognition of H2PO4, HP2O73−, F and ATP through fluorescence and gelation studies

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Abstract

Benzimidazolium-based receptors 1 and 2 have been designed and synthesized. The receptors with identical binding sites exhibit different sensing properties towards different anions under identical conditions. In a lower equivalent amount of guests, receptors 1 and 2 show fluorescence selectivity towards phosphate-based anions. In the presence of higher equivalent amounts of guests, while structure 1 reveals selectivity in sensing of phosphate derivatives such as hydrogen pyrophosphate and dihydrogenphosphate in CH3CN, under identical conditions receptor structure 2 senses F. Furthermore, compounds 1 and 2 validate the visual sensing of hydrogen pyrophosphate and dihydrogenphosphate, respectively, through the formation of gels. Binding studies have been carried out using fluorescence, UV-vis, 1H NMR and 31P NMR spectroscopic techniques. Experimental results have been correlated with the theoretical findings.

Graphical abstract: Benzimidazolium-based chemosensors: selective recognition of H2PO4−, HP2O73−, F− and ATP through fluorescence and gelation studies

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Publication details

The article was received on 09 Apr 2015, accepted on 22 Apr 2015 and first published on 23 Apr 2015


Article type: Paper
DOI: 10.1039/C5RA06301A
RSC Adv., 2015,5, 46608-46616

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    Benzimidazolium-based chemosensors: selective recognition of H2PO4, HP2O73−, F and ATP through fluorescence and gelation studies

    K. Ghosh, D. Kar, D. Sahu and B. Ganguly, RSC Adv., 2015, 5, 46608
    DOI: 10.1039/C5RA06301A

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