Selective colorimetric detection of cysteine based on phenylvinylbisquinoline for its potential implementation in optoelectronic sensors

We report a sensitive colorimetric chemosensor for cysteine based on phenylvinylbisquinoline, named M1. Selectivity for l -cysteine was demonstrated, causing a colorimetric change. The interaction between M1 and l -cysteine suggests a possible click reaction that alters the optical properties, which...

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Veröffentlicht in:Journal of materials science. Materials in electronics 2023-05, Vol.34 (13), p.1116, Article 1116
Hauptverfasser: Islas-Rodríguez, N., Muñoz, R., Vázquez-García, R. A., Rodríguez, Jose A., Reyes-Pérez, M., Hernández-Ortiz, O. J.
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Sprache:eng
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Zusammenfassung:We report a sensitive colorimetric chemosensor for cysteine based on phenylvinylbisquinoline, named M1. Selectivity for l -cysteine was demonstrated, causing a colorimetric change. The interaction between M1 and l -cysteine suggests a possible click reaction that alters the optical properties, which are consistent with the predictions in the study of TD-DFT. 1  H RMN, FTIR spectroscopies, and mass spectrometry confirmed the chemical structure obtained by the click reaction. Optical characterization revealed a bathochromic shift and a weakening of the fluorescence of M1 with increasing l -cysteine concentration. The detection limit for cysteine was 0.45 mM, the quantification limit was 1.36 mM, and the molar ratio method confirmed a stoichiometry of 1:2 between M1 and l -cysteine. This molecule can be used in electronic devices for in situ sensing of l -cysteine by a colorimetric shift.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-023-10538-z