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An Efficient Molecular Scaffold Exhibiting Fluorescence “Turn–On” Response for Cyanide and HCN
Author(s) -
Gupta Ramesh C.,
Dwivedi Sushil K.,
Ali Rashid,
Misra Arvind
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702901
Subject(s) - chemistry , cyanide , fluorescence , intramolecular force , photochemistry , selectivity , detection limit , proton nmr , ion , naked eye , molecular probe , derivative (finance) , stereochemistry , inorganic chemistry , organic chemistry , catalysis , chromatography , biochemistry , physics , dna , quantum mechanics , financial economics , economics
Abstract The present work describes design and synthesis of a biphenylaldimine derivative, probe 2 as an efficient molecular scaffold. The probe 2 showed good photophysical behavior and upon interaction with anions and gases showed high selectivity and sensitivity for CN ‐ anion and HCN gas through a reaction based chemodosimeter approach with limit of detection 24 ppb and 7 ppm, respectively. The change in optical behavior of the probe is attributed to intramolecular charge transfer (ICT) mechanism. Probe 2 displayed enhanced emission, “ turn‐on ” due to the formation of a new biphenyl oxazole derivative 4 in the medium along with change in color of the medium which was sensitive to the naked‐eyes. The mechanism of interaction between probe and cyanide anion have been confirmed by the 1 H NMR, 13 C NMR and HRMS spectral data analysis. The molecular probe 2 has been successfully utilized to detect cyanide (CN ‐ ) and HCN gas in solution and on test paper strips.