Ferrocene appended fluorescein-based ratiomeric fluorescence and electrochemical chemosensor for Fe3+ and Hg2+ ions in aqueous media: Application in real samples analysis
| Autor: | Sushil Ranjan Bhatta, Arunabha Thakur, Adwitiya Pal, Ujwal K. Sarangi |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010405 organic chemistry
Chemistry Inorganic chemistry Carbon-13 NMR 010402 general chemistry Electrochemistry 01 natural sciences Fluorescence Cycloaddition 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound Ferrocene Materials Chemistry Proton NMR Titration Azide Physical and Theoretical Chemistry |
| Zdroj: | Inorganica Chimica Acta. 498:119097 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/j.ica.2019.119097 |
| Popis: | A novel visually detectable fluorescein-based chemosensor (4) containing a ferrocene backbone has been designed and synthesized successfully by simultaneously introducing ferrocene with an azide appendage and fluorescein with an alkyne functional group via a [2 + 3] cycloaddition reaction. Further, its sensing response towards various metal cations was examined via multiple channels. The probe shows a remarkable specificity towards Fe3+ and Hg2+ ions through “naked-eye” detection as well as via ratiometric fluorescence emission with limits of detection of 9.75 × 10–8 M and 39 × 10–8 M for Fe3+ and Hg2+ ions, respectively. Further, shifts in the voltammogram towards anodic potential of ΔE1/2 = 31 and 33 mV are observed upon binding Fe3+ and Hg2+ ions, respectively. Characterization of compound 4 has been done by 1H NMR, 13C NMR, high-resolution mass spectrometry (HRMS) and CHN analysis studies. The stoichiometry of the complex of the present probe with either Fe3+ or Hg2+ is indicative of a 1:1 ratio, which was determined by Job’s plot as well as 1H NMR titration data. The incorporation of compound 4 in solid support has made the work more practicable. In addition, the practical application of receptor 4 was successfully explored towards the detection of Fe3+ and Hg2+ ions in real water samples by using the different water sources. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect