Lowering the detection limit of Cd2+ using functionalized associates of spiro[indoline-benzopyran] with tetraphenylborate ion
- Authors: Chepak A.K.1, Mironenko A.Y.1, Tutov M.V.1, Bratskaya S.Y.1
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Affiliations:
- Institute of Chemistry, FEB RAS
- Issue: No 4 (2025)
- Pages: 170-180
- Section: Analysis of natural and man-made objects
- URL: https://journal-vniispk.ru/0869-7698/article/view/351736
- DOI: https://doi.org/10.7868/S3034530825040147
- ID: 351736
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Abstract
The development of new functionalized organic compounds capable of efficiently coordinating metal ions remains a pressing challenge in the design of chemical sensors for environmental monitoring. In this work, a significant reduction in the detection limit of Cd²⁺ ions was achieved by using a 6-formyl-substituted spiro[indoline-benzopyran]. Derivative containing a benzoxazole fragment at the 8´position of the benzopyran moiety. Incorporation of spiropyran molecules into a siloxane-acrylate latex matrix and their association with a tetraphenylborate ion, acting as a spacer to prevent π-stacking and self-quenching of luminescence, led to a notable enhancement in sensor sensitivity. The use of transparent, ion-permeable latex films modified with SP·TFB complexes enabled a five orders of magnitude decrease in the detection limit of Cd²⁺, reaching 1.66 nM.
About the authors
A. K. Chepak
Institute of Chemistry, FEB RAS
Email: chepak.ak@mail.ru
Vladivostok, Russia
A. Y. Mironenko
Institute of Chemistry, FEB RAS
Email: almironenko@gmail.com
Vladivostok, Russia
M. V. Tutov
Institute of Chemistry, FEB RAS
Email: thunderbird87@mail.ru
Vladivostok, Russia
S. Y. Bratskaya
Institute of Chemistry, FEB RAS
Email: sbratska@ich.dvo.ru
Vladivostok, Russia
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