AIEE active Cholyl Hydrazide Carbazole-Schiff base for selective detection of copper (II) ion

• Published in: Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2024-06, Vol.451, p.115519, Article 115519
• Main Authors: Bariya, Dipakkumar, Vyas, Saurabh, Mishra, Roli, Mishra, Satyendra
• Format: Article
• Language: English
• Subjects: AIEE; Carbazole; Cholic acid; Copper-sensor; Schiff base
• ISSN: 1010-6030; 1873-2666
• DOI: 10.1016/j.jphotochem.2024.115519

[Display omitted] •The novel Cholyl Hydrazide Carbazole-Schiff base (ChHCz-SB) was synthesized and characterized by various spectroscopic techniques.•The ChHCz-SB exhibited excellent AIEE property in 70% Water-THF mixture, which was 5.93-fold higher than in pure THF.•Fluorescent probe ChHCz-SB was selective for Cu2+ ion in presence of different heavy metal ions.•The limit of detection (LOD) and binding constant (Ka) was calculated to be 1.59 × 10−7 M and 5.3 × 107 M−1, respectively. A novel aggregation-induced emission enhancement (AIEE) active Schiff-based fluorescent probe Cholyl Hydrazide Carbazole-Schiff base (ChHCz-SB) was synthesized using cholyl hydrazide and carbaldehyde, and its properties were assessed using a range of spectroscopic methods. In a 70 % water-THF mixture, the ChHCz-SB showed the highest fluorescence intensity, which was 5.93 times greater than in pure THF. It was discovered that in the presence of different cations and anions. ChHCz-SB was a sensitive and selective “turn-off” fluorescence detector for Cu2+ metal ions. The binding constant (Ka) and limit of detection (LOD) were found to be 5.3 × 107 M−1 and 1.59 × 10−7 M, respectively. Job's plot was used to determine the 1:1 binding stoichiometry between copper (II) metal ion and ChHCz-SB. Moreover, Cu2+ metal ion concentration in various water samples was successfully measured using the fluorescent probe ChHCz-SB. Furthermore, the distribution of electronic states in the Schiff base and the sensing mechanism were investigated through Density functional theory (DFT) calculations of ChHCz-SB.