Fluorescent "turn-Off" detection of fluoride and cyanide ions using zwitterionic spirocyclic meisenheimer compounds
Stable zwitterionic spirocyclic Meisenheimer compounds were synthesized using a one-step reaction between picric acid and diisopropyl (ZW1) or dicyclohexyl (ZW3) carbodiimide. A solution of these compounds displays intense orange fluorescence upon UV or visible light excitation, which can be quenche...
| Autores: | , , , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2017 |
| País: | España |
| Recursos: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:201594 |
| Acesso em linha: | https://ddd.uab.cat/record/201594 https://dx.doi.org/urn:doi:10.3390/molecules22111842 |
| Access Level: | acceso abierto |
| Palavra-chave: | Colorimetric Cyanide Fluorescence Fluoride Meisenheimer complex Spirocyclic Zwitterionic |
| Resumo: | Stable zwitterionic spirocyclic Meisenheimer compounds were synthesized using a one-step reaction between picric acid and diisopropyl (ZW1) or dicyclohexyl (ZW3) carbodiimide. A solution of these compounds displays intense orange fluorescence upon UV or visible light excitation, which can be quenched or "turned-off" by adding a mole equivalent amount of F⁻ or CN⁻ ions in acetonitrile.Fluorescence is not quenched in the presence of other ions such as Cl⁻, Br⁻, I⁻, NO₂⁻ , NO₃⁻ , or H₂PO₄⁻ These compounds can therefore be utilized as practical colorimetric and fluorescent probes for monitoring the presence of F⁻ or CN⁻ anions. |
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