Tetra-cyanostilbene macrocycle: An effective “turn-on” fluorescence sensor for oxalic acid in aqueous media
Journal of Photochemistry and Photobiology A: Chemistry, ISSN: 1010-6030, Vol: 435, Page: 114307
2023
- 10Citations
- 3Captures
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Article Description
Although some detection methods for oxalic acid have been reported, the rapid, simple and on-site detection on oxalic acid was rarely presented. In this work, a “turn-on” fluorescence sensor for oxalic acid was realized by the simple and on-site procedure in aqueous media. A tetra-cyanostilbene macrocycle was synthesized by simple “2 + 2” condensation in 72 % yield. It displayed the strong “turn-on” blue fluorescence on selectively detecting oxalic acid among various ions and biomolecules. It possessed the high sensing sensitiveness with the detection limit of 3.82 × 10 −6 M. The sensing mechanism was clarified by pH influence on complexation, fluorescence Jobs’ plot, MS spectra, and 1 H NMR spectra, confirming that non-dissociated oxalic acid was bound in the cavity of the macrocycle based on hydrogen bonds. This sensing ability for oxalic acid was successfully applied in test paper, on-site detection for real samples of taros and rust treatment, suggesting the good application prospect in the rapid, simple and on-site detection for oxalic acid in daily life and industry.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1010603022005305; http://dx.doi.org/10.1016/j.jphotochem.2022.114307; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85139066314&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S1010603022005305; https://dx.doi.org/10.1016/j.jphotochem.2022.114307
Elsevier BV
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