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Fluorescence Sensors for Bismuth (III) Ion from Pyreno[4,5‐ d ]imidazole Derivatives
Author(s) -
Chanawungmuang Nichapa,
Sukwattanasinitt Mongkol,
Rashatasakhon Paitoon
Publication year - 2020
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/php.13331
Subject(s) - chemistry , imidazole , bismuth , fluorescence , detection limit , aqueous solution , pyrene , titration , ion , inorganic chemistry , nuclear chemistry , photochemistry , organic chemistry , chromatography , physics , quantum mechanics
Three pyreno[4,5‐ d ]imidazole derivatives are synthesized and evaluated as fluorescent sensors for bismuth (III) ion. The target compounds are prepared in 55–86% yields from a condensation reaction between pyrene‐4,5‐dione and aromatic aldehydes. The compound bearing a phenolic group can selectively detect bismuth (III) ion via fluorescence enhancement with a detection limit of 1.20 μ m in CH 3 CN‐DMSO mixture and 3.40 μ m in 10% pH5 aqueous in CH 3 CN‐DMSO mixture. The sensing mechanism involving a formation of coordination complex is investigated by UV‐VIS and fluorescence titrations, 1 H‐NMR and the decomplexation of the bismuth complex by sulfide ion. The application of this sensor for quantitative analysis of spiked bismuth (III) ion in real water samples from two different sources is demonstrated.