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The Synergistic Effect of Introducing Hemicurcuminoid into a Planar Polydiacetylene Platform for Optical Detection of Lead Ionsстатья
- Авторы: Skvortsova N.G., Berleva A.V., Akhmadeev B.S., Podyachev S.N., Mustafina A.R., Selektor S.L.
- Журнал: Protection of Metals and Physical Chemistry of Surfaces
- Том: 61
- Номер: 6
- Год издания: 2025
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 1283
- Последняя страница: 1297
- DOI: 10.1134/S2070205125701199
- Аннотация: In this work, the influence of the modifying additive hemicurcuminoid HCur on the sensory ability of monolayers and ultrathin films based on polydiacetylene (PDA) was investigated. Using electron and fluorescence spectroscopy, it was established that in both the monocomponent and modified systems, when exposed to a lead perchlorate solution, both on the monolayer at the air–water interface and on the films formed from it, a chromatic transition occurs from the blue nonfluorescent form of PDA to the red fluorescent form. The presence of the chemicurcuminoid HCur in the system leads to an increase in the colorimetric response of the transition and a significant increase in the fluorescent response. It has been demonstratedthat the optical sensory responses of mixed PDA–HCur monolayers and films are significantly higher than those of similar single-component Langmuir PDA systems. It has been shown that the chemicurcuminoid HCur actively participates in the coordination binding of lead ions, apparently through the deprotonated enol form, as evidenced by the quenching of the dye fluorescence with a simultaneous increase in the intensity of its absorption bands. Moreover, the presence of HCur significantly enhances the opticalresponse of PDA to lead cations, indicating the manifestation of a synergistic effect of such modification. The described results may serve as a reason for further study of this system with the aim of developing a highly sensitive, selective two-signal sensor for lead ions in an aqueous environment.
- Добавил в систему: Селектор София Львовна