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Tetraphenylethylene AIEgen bearing thiophenylbipyridine receptor for selective detection of copper(II) ion.
- Source :
-
New Journal of Chemistry . 5/7/2021, Vol. 45 Issue 17, p7614-7621. 8p. - Publication Year :
- 2021
-
Abstract
- Highly emissive tetraphenylethylene chromophore appended thiophenylbipyridine pendant as a receptor (1) site has been successfully synthesized via a multistep reaction pathway. The synthesized chromophore 1 was well characterized by modern spectroscopy. In particular, the solid sample of 1 exhibits significant mechanochromic behavior upon grinding, fuming and heating. The yellow emissive chromophore 1 exhibits remarkable selectivity and sensitivity towards copper(II) perchlorate ions via a photoinduced electron transfer (PET) 'turn off–turn on' mechanism. When compared with competing metal ions, 1 shows little to no interference in selectivity towards Cu2+ ions in acetonitrile. Detailed colorimetric, UV-visible, emission, and 1H NMR spectral studies have been employed to understand the sensing mechanism of 1 towards Cu2+ ion interaction which is responsible for PET 'turn-on'. The binding constant of 1 with Cu2+ was shown to be 2.34 × 10−5 M with a limit of detection as low as 7.93 nM. The binding constant prompted us to explore chromophore 1 as a paper strip sensor for Cu2+ to develop kits for real-world practical utility. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 45
- Issue :
- 17
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 150142591
- Full Text :
- https://doi.org/10.1039/d1nj01001h