A fluorescently-doped thermoplastic polymer as a proof-of-principle device for the detection and capture of H2S and its HS− anion

• Published in: Journal of photochemistry and photobiology. A, Chemistry. Vol. 458; p. 115993
• Main Authors: Rizzo, Paola, Cozzolino, Antonietta, Syed, Salman, Vykhovanets, Viktoriia, Landi, Alessandro, Pietro Oliveri, Ivan, Pellecchia, Claudio, Strianese, Maria
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-01-2025
• ISSN: 1010-6030
• DOI: 10.1016/j.jphotochem.2024.115993

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•Mononuclear and dinuclear Zn(salen)-type complexes functioning as HS- sensors.•Sulfonated polyphenyleneoxide (PPO) films for the implementation in a HS- measuring device.•The adsorption/desorption process of HS- with the present device was proven to be successful.
Mono and dinuclear Zn(salen-type) complexes 1 and 2 are presented as efficient sensing and adsorption materials for HS-. The addition of HS− provokes colorimetric and fluorometric changes, useful for optical absorption and fluorescence analyses. Moreover, the limit of detection for HS− for both complexes falls in the sub-micromolar range of concentration. The adsorption/desorption process of HS- nanoporous crystalline sulfonated polyphenyleneoxide (NC-sPPO) films doped with Zn(salen-type) complexes and an interesting recycling-potential of this system in the detection of hydrogen sulfide, even over time, was proven. The presented results provide proof-of-principle that a fluorescent complex immobilized in a suitable thermoplastic polymer could be the right material to use in a HS- measuring device that might lead to new developments in the field of optical sensing.