J. Mandal, Pravat Ghorai, K. Pal
2019
Citations
0
Influential Citations
39
Citations
Journal
Journal of Luminescence
Abstract
Abstract A 2-hydroxy-5-methylisophthalaldehyde (HMP) based Schiff-base ligand (HL) was successfully developed as a fluorescent and colorimetric chemosensor for dual detection of Zn2+and Cu2+ions in HEPES buffer medium (H2O:Methanol = 9:1 (v/v), pH= 7.4). Interestingly, in presence of Zn2+ around 16 times increment in fluorescence intensity and in presence of Cu2+ ~ 174 times decrease in fluorescence intensity has been observed. The 1:2 binding modes for both HL-Zn2+/Cu2+complexes are proved by fluorescence measurements, ESI-MS analysis and DFT-Calculations. The reversibility and regeneration process of HL are also established using Na2EDTA. It has been observed that Chemosensor HL exhibits a rapid change in fluorescence intensity within pH range 6–8 against Zn2+and Cu2+ions. Low detection limit was found to be 1.059 × 10-9(M) and 3.53 × 10-9 (M) for Zn2+ and Cu2+ ions respectively. These values also suggest that the chemosensor HL has great potential to detect Zn2+ and Cu2+ ions in environmental and biological studies.