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Published on: October 9, 2021
Tryptanthrin-malononitrile adduct for highly efficient turn-off fluorescent sensing of aniline
Haitham K R Al-Sharifi1, Arsha Rajan1, S L Sruthi1
1Department of Chemistry, University of Kerala, Kariavattom, Trivandrum 695581, India.
Abstract:
The fluorescence quenching of 2-(8-chloro-12-oxo-12H-indolo[2,1-b]quinazolin-6-ylidene)-malononitrile (5a) by aniline was studied in detail. Time correlated single photon counting measurements (TCSPC) indicated that the quenching involved both static and dynamic mechanisms without ground state complex formation. The selectivity towards aniline sensing in presence of other amines/aromatics and the anti-interference studies together with the low LOD value indicates the potential of 5a as a molecular probe for aniline sensing which is unaffected by pH alteration as well.
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