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Title: | A water-soluble bithiophene with increased photoluminescence efficiency and metal recognition ability | Authors: | Delgado-Pinar, Estefanía Pineiro, Marta Melo, J. Sérgio Seixas de |
Issue Date: | 15-Sep-2020 | Publisher: | Royal Society of Chemistry | Project: | 02/SAICT/2017 TDC/QUI-QFI/31625/2017 SAICTPAC/0046/2015 info:eu-repo/grantAgreement/CENTRO-01-0145-FEDER-000014/PT |
Serial title, monograph or event: | Dalton Transactions | Volume: | 49 | Issue: | 35 | Abstract: | A new water-soluble tri-tert-butyl-bithiophenesulfonamide (α2-tbS) was synthesized and a comprehensive spectroscopic and photophysical study was undertaken in organic solvents and water at different pH values. In contrast to the behaviour found for the parent (and un-substituted) α,α'-bithiophene (α2), in which radiationless decay processes are the main excited-state deactivation channels, the tert-butylsulfonamide derivative presents a significant fluorescence quantum yield (φF) (ca. one order of magnitude higher than that of α2). The high φF allowed further exploring α2-tbS as a selective fluorimetric sensor for metal ions. A strong selectivity towards Cu(ii) is observed at neutral pH values, whereas at pH = 9.5 a strong quenching upon the addition of Hg(ii) is observed. An additional high sensitivity of 0.64 ± 0.02 ppm towards Cu(ii) was observed, well below 1.25 ppm (∼20 μM), the maximum value allowed in drinking water by the EPA. | URI: | https://hdl.handle.net/10316/93141 | ISSN: | 1477-9234 1477-9226 |
DOI: | 10.1039/d0dt01385d | Rights: | embargoedAccess |
Appears in Collections: | I&D CQC - Artigos em Revistas Internacionais |
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A water-soluble bithiophene with increased.pdf | 1.72 MB | Adobe PDF | View/Open |
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