A novel imidazole‐derived Schiff base as selective and sensitive colorimetric chemosensor for fluorescent detection of Cu2+ in methanol with mixed aqueous medium. (10th August 2021)

• Record Type: Journal Article
• Authors: Slassi, Siham; Aarjane, Mohammed; Amine, Amina
• Is Part Of: Applied organometallic chemistry. Volume 35:Number 11(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-08-10
• Subjects: CHEF effect -- chemosensor -- colorimetric -- copper ion -- ICT; Organometallic chemistry -- Periodicals; Organometallic compounds -- Periodicals; 547.05
• DOI: 10.1002/aoc.6408
• Languages: English
• ISSNs: 0268-2605

Abstract

Abstract: A highly efficient, selective, sensitive, and colorimetric chemosensor SB for Cu 2+ detection with turn‐on fluorescence behavior in CH3 –water solution was synthesized. A good enhancement of the intensity of fluorescence was detected by the incremental addition of Cu 2+ after excitation at 286 nm. The fluorescence quantum yield (Ф) of SB –Cu 2+ was calculated for 0.41. The responsive mechanism of SB to copper ion is involved for on the combined effects of C═N isomerization and intramolecular charge transfer (ICT) process and chelation‐enhanced fluorescence (CHEF). The detection limit for the fluorescent chemosensor SB toward Cu 2+ was 0.6 × 10 −6 M. Abstract : A new imidazole‐based Schiff base chemosensor SB was designed, synthetized, and characterized. The Schiff base shows high selective, sensitive, and colorimetric chemosensor for Cu 2+ detection in methanol with aqueous medium. The selectivity mechanism of SB for Cu 2+ was found to be based on the combined effects of the inhibition of intramolecular charge transfer (ICT) and chelation‐enhanced fluorescence (CHEF). The detection limit for the fluorescent chemosensor SB toward Cu 2+ was 0.6 × 10 −6 M.