Publication Date:
2018-07-05
Description:
New thiosemicarbazide-linked acridines 3a–c were prepared and investigated as chemosensors for the detection of biologically and environmentally important anions. The compounds 3a–c were found selective for fluoride (F – ) with no affinity for other anions, i.e. – OAc, Br – , I – , HSO 4 – , SO 4 2– , PO 4 3– , ClO 3 – , ClO 4 – , CN – and SCN – . Further, upon the gradual addition of a fluoride anion (F – ) source (tetrabutylammonium fluoride), a well-defined change in colour of the solution of probes 3a–c was observed. The anion-sensing process was studied in detail via UV–visible absorption, fluorescence and 1 H-NMR experiments. Moreover, during the synthesis of acridine probes 3a–c nickel fluoride (NiF 2 ), a rarely explored transition metal fluoride salt, was used as the catalyst. Theoretical studies via density functional theory were also carried out to further investigate the sensing and anion (F – ) selectivity pattern of these probes.
Keywords:
organic chemistry, computational chemistry
Electronic ISSN:
2054-5703
Topics:
Natural Sciences in General
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