Schiff Base Compounds Derived from 5-Methyl Salicylaldehyde as Turn-On Fluorescent Probes for Al³⁺ Detection: Experimental and DFT Calculations.

ABSTRACT: Using 5-methyl salicylaldehyde (2) as a reactant to react with different amines, 2-aminobenzimidazole (1a), 2-aminobenzothiazole (1b), and 2-aminopyridine (1c), respectively, three types of Schiff base fluorescent probes 3a-3c were designed and synthesized for selective detection of Al³⁺ in aqueous media. The structure of the compounds was acquired by ¹H NMR, ¹³C NMR, and X-ray single-crystal diffraction. Furthermore, their photochromic and fluorescent behaviors have been investigated systematically by fluorescence spectra. Compounds 3a-3c can exhibit high selectivity, sensitivity, and anti-interference properties towards Al³⁺ in aqueous media. Among them, the limit of detection (LOD) of pro

SUBMITTER: Li HQ 

PROVIDER: S-EPMC11901710 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature