A naphthol-functionalized bis(salamo)-like chromogenic and fluorogenic probe for monitoring hydrogen sulfide and application in water samples

Activity-Based Fluorescent Probes for Hydrogen Sulfide and Related Reactive Sulfur Species

“…Dong reported polyimine 751 (TBS) that provided a fluorescent turn-on response at 502 nm when treated with H 2 S and was used to investigate H 2 S levels in different water samples. 760 The authors attributed the turn-on response to sulfide-mediated phenol deprotonation, but we have grouped this example with other imine-based systems. Using a similar approach, Elango reported the bithiophene-based 752, which provided a turn-on response to both H 2 S and CN − at 461 nm in 40% DMSO in water.…”

“…Dong reported polyimine 751 (TBS) that provided a fluorescent turn-on response at 502 nm when treated with H 2 S and was used to investigate H 2 S levels in different water samples . The authors attributed the turn-on response to sulfide-mediated phenol deprotonation, but we have grouped this example with other imine-based systems.…”

Small Molecule Optical Probes for Detection of H2S in Water Samples: A Review

“…“Salen-type” ligands are a class of coordination compounds produced when a bisaldehyde condenses with a diamine. The introduction of large electronegative oxygen atoms to the CN–group of salen-type ligands results in salamo-type probes with improved coordination flexibility, structural stability, high selectivity, and sensitivity. − Based on this background, Guo et al prepared a rigid structured fluorescent probe 1 with naphthol units and π-conjugation for dual-channel detection of H 2 S . The sensor worked in a wide pH range of 4–9 with a response time of <3 s. The deprotonation of the hydroxyl groups hindered the ICT in the probe in the presence of H 2 S, which resulted in vivid changes in the FL intensity, facilitating the detection of the biothiol.…”

“…The introduction of large electronegative oxygen atoms to the C=N–group of salen-type ligands results in salamo-type probes with improved coordination flexibility, structural stability, high selectivity, and sensitivity. 106 − 113 Based on this background, Guo et al prepared a rigid structured fluorescent probe 1 with naphthol units and π-conjugation for dual-channel detection of H 2 S. 114 The sensor worked in a wide pH range of 4–9 with a response time of <3 s. The deprotonation of the hydroxyl groups hindered the ICT in the probe in the presence of H 2 S, which resulted in vivid changes in the FL intensity, facilitating the detection of the biothiol. Further, as azo-dye containing Schiff bases are known for their excellent chromophoric strength, Manna et al prepared an azo-dye based bis-Schiff base probe 2 that could detect S 2– ion both visually and spectrophotometrically in pure aqueous medium, within 5–10 pH through a deprotonation mechanism.…”