Amino-acid-derived emerging sensor for detection of s2- ion and meoh percentage in meoh-h2o mixture

Abstract

Designing fluorescent probes and its metal-organic materials getting attention due to their fascinating utility in several fields from material to biology. Here, we synthesized N-phenyl glycine substituted four new fluorescent probes viz. (2-cyanophenyl)glycine [HL1], (5-chloro-2-cyanophenyl)glycine [HL2], (4-chloro-2-cyanophenyl)glycine [HL3], (2-cyano-3-fluoro-phenyl)glycine [HL4] and investigated its properties through spectroscopic techniques. Out of all probes, HL1 displayed non-emissive nature in the presence of water and uniquely detect the percentage of methanol in the methanol-water mixture or vice-versa out of the different solvent-water mixture with the help of fluorometric technique. Furthermore, cobalt complex [Co(L1)(phen)2]ClO4 (C1) with distorted octahedral geometry has been synthesized by using HL1. The emissive nature of the complex C1 was further utilized for the selective sensing of S2- ion in the DMSO-water mixture by quenching the fluorescence with a detection limit of 4.8 μM. The selective solvent percentage detection and anion sensing illustrate the potential efficacy of the designed sensors for analytical intent. © 2020 Wiley-VCH GmbH.