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The Synergistic Effect of Introducing Hemicurcuminoid into a Planar Polydiacetylene Platform for Optical Detection of Lead Ions.

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Title: The Synergistic Effect of Introducing Hemicurcuminoid into a Planar Polydiacetylene Platform for Optical Detection of Lead Ions.
Authors: Skvortsova, N. G.1 (AUTHOR) nata14skv@yandex.ru, Berleva, A. V.1 (AUTHOR), Akhmadeev, B. S.2 (AUTHOR), Podyachev, S. N.2 (AUTHOR), Mustafina, A. R.2 (AUTHOR), Selektor, S. L.1 (AUTHOR)
Source: Protection of Metals & Physical Chemistry of Surfaces. Dec2025, Vol. 61 Issue 6, p1263-1277. 15p.
Subjects: Optical sensors, Curcuminoids, Ligand binding (Biochemistry), Chromaticity, Fluorescence spectroscopy, Polymers
Abstract: This study investigated the effect of the modifying additive hemicurcuminoid HCur on the sensory ability of monolayers and ultrathin films based on polydiacetylene 10,12-pentacosadiynoic acid (PCDA; the polymerized form is denoted as polyPCDA). Using UV-Vis and fluorescence spectroscopy, it was established that in both the monocomponent and modified systems, when exposed to a lead perchlorate solution, either in the monolayer at the air–water interface and in the films formed from it, a chromatic transition from the blue nonfluorescent form of polydiacetylene (PDA) to the red fluorescent form occurs. The presence of the hemicurcuminoid HCur in the system leads to an increase in the colorimetric response of the transition and a significant growth of the fluorescent response. It has been demonstrated that the optical sensory responses of mixed polyPCDA–HCur monolayers and films are significantly higher than those of similar monocomponent Langmuir polyPCDA systems. It has been shown that the hemicurcuminoid 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 optical response of polyPCDA 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 in order to develop a highly sensitive, selective two-signal sensor for lead ions in an aqueous environment. [ABSTRACT FROM AUTHOR]
Copyright of Protection of Metals & Physical Chemistry of Surfaces is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: The Synergistic Effect of Introducing Hemicurcuminoid into a Planar Polydiacetylene Platform for Optical Detection of Lead Ions.
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  Data: <searchLink fieldCode="AR" term="%22Skvortsova%2C+N%2E+G%2E%22">Skvortsova, N. G.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nata14skv@yandex.ru</i><br /><searchLink fieldCode="AR" term="%22Berleva%2C+A%2E+V%2E%22">Berleva, A. V.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Akhmadeev%2C+B%2E+S%2E%22">Akhmadeev, B. S.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Podyachev%2C+S%2E+N%2E%22">Podyachev, S. N.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mustafina%2C+A%2E+R%2E%22">Mustafina, A. R.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Selektor%2C+S%2E+L%2E%22">Selektor, S. L.</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Protection+of+Metals+%26+Physical+Chemistry+of+Surfaces%22">Protection of Metals & Physical Chemistry of Surfaces</searchLink>. Dec2025, Vol. 61 Issue 6, p1263-1277. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Optical+sensors%22">Optical sensors</searchLink><br /><searchLink fieldCode="DE" term="%22Curcuminoids%22">Curcuminoids</searchLink><br /><searchLink fieldCode="DE" term="%22Ligand+binding+%28Biochemistry%29%22">Ligand binding (Biochemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Chromaticity%22">Chromaticity</searchLink><br /><searchLink fieldCode="DE" term="%22Fluorescence+spectroscopy%22">Fluorescence spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Polymers%22">Polymers</searchLink>
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  Data: This study investigated the effect of the modifying additive hemicurcuminoid HCur on the sensory ability of monolayers and ultrathin films based on polydiacetylene 10,12-pentacosadiynoic acid (PCDA; the polymerized form is denoted as polyPCDA). Using UV-Vis and fluorescence spectroscopy, it was established that in both the monocomponent and modified systems, when exposed to a lead perchlorate solution, either in the monolayer at the air–water interface and in the films formed from it, a chromatic transition from the blue nonfluorescent form of polydiacetylene (PDA) to the red fluorescent form occurs. The presence of the hemicurcuminoid HCur in the system leads to an increase in the colorimetric response of the transition and a significant growth of the fluorescent response. It has been demonstrated that the optical sensory responses of mixed polyPCDA–HCur monolayers and films are significantly higher than those of similar monocomponent Langmuir polyPCDA systems. It has been shown that the hemicurcuminoid 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 optical response of polyPCDA 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 in order to develop a highly sensitive, selective two-signal sensor for lead ions in an aqueous environment. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Protection of Metals & Physical Chemistry of Surfaces is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Dec2025
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