In:
RSC Advances, Royal Society of Chemistry (RSC), Vol. 13, No. 25 ( 2023), p. 17202-17211
Kurzfassung:
Four benzoindolenine-based squaraine dyes (SQs), which have the advantages of intense visible and near-infrared (NIR) absorption and emission ( λ abs/max 663–695 nm, λ em/max 686–730 nm) were synthesized and characterized by UV-vis absorption, fluorescent emission spectrophotometry, FTIR, NMR and HRMS analysis. Among them, BBSQ showed excellent performance, which exhibited high selectivity to Fe 3+ , Cu 2+ , and Hg 2+ in acetonitrile solution even in the presence of other competitive metal ions, accompanied by obvious color change easily detected by the naked eye. The detection limit was 14.17 μM for Fe 3+ and 6.06 μM for Cu 2+ . Most importantly, the response mechanism of BBSQ to Fe 3+ , Cu 2+ , and Hg 2+ involves the coordination of BBSQ and metal ions through the O atom on the central squarate ring, N atom, and olefin π bond of BBSQ and has been demonstrated by Job's plot, FTIR, and 1 H NMR titration analyses. Furthermore, BBSQ was applied successfully to detect Fe 3+ , Cu 2+ , and Hg 2+ in thin-layer chromatography (TLC) plates with good precision and is quite promising for the quantitative detection of Fe 3+ and Cu 2+ ions in water samples.
Materialart:
Online-Ressource
ISSN:
2046-2069
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2023
ZDB Id:
2623224-8
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