Development of a "Turn-on" Fluorescent Probe-Based Sensing System for Hydrogen Sulfide in Liquid and Gas Phase.
Front Chem
; 7: 641, 2019.
Article
em En
| MEDLINE
| ID: mdl-31616654
ABSTRACT
A "turn-on" fluorescence sensing system based on a BODIPY-cobaloxime complex for the detection of H2S in liquid and gas phase was developed. To that aim, two cobaloxime complexes bearing an axial pyridyl-BODIPY ligand were initially evaluated as sensitive fluorescent HS- indicators in aqueous solution. The sensing mechanism involves the selective substitution of the BODIPY ligand by the HS- anion at the cobalt center, which is accompanied by a strong fluorescence enhancement. The selection of a complex with an ideal stability and reactivity profile toward HS- relied on the optimal interaction between the cobalt metal-center and two different pyridyl BODIPY ligands. Loading the best performing BODIPY-cobaloxime complex onto a polymeric hydrogel membrane allowed us to study the selectivity of the probe for HS- against different anions and cysteine. Successful detection of H2S by the fluorescent "light-up" membrane was not only accomplished for surface water but could also be demonstrated for relevant H2S concentrations in gas phase.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article