In:
Materials Advances, Royal Society of Chemistry (RSC), Vol. 2, No. 19 ( 2021), p. 6306-6314
Abstract:
A new Schiff base receptor (3) was synthesized by an equimolar reaction between isonicotinic hydrazide and 2,4-dihydroxybenzaldehyde in ethanol. Receptor 3 demonstrated excellent selectivity and sensitivity towards Cu 2+ ions and Al 3+ ions by UV-vis absorption spectroscopy and fluorescence spectroscopy, respectively. Receptor 3 showed a detectable color change from colorless to yellow with a red-shift (Δ λ ≈ 70 nm) in the absorption spectra in the presence of Cu 2+ . In the emission study of 3, Al 3+ showed significant fluorescent enhancement ( λ em = 473 nm) over a wide range of tested metal ions. The quantum yield of receptor 3 ( Φ = 0.0021) increases ∼230 folds in the presence of Al 3+ ions to form receptor 3·Al3+ complex ( Φ = 0.484). Receptor 3 showed high selectivity for Al 3+ with a K a of 4.8 × 10 4 M −1 and LOD of 3.0 nM. In comparison, K a for Cu 2+ was 1.3 × 10 4 M −1 and LOD of 1.9 μM. Receptor 3 is an excellent chemosensor for detecting Al 3+ ions as indicated by its nanomolar range LOD. The quick response, easy-synthesis, and high sensitivity make receptor 3 an ideal sensor for detecting Al 3+ ions in a semi-aqueous medium and living cells.
Type of Medium:
Online Resource
ISSN:
2633-5409
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2021
detail.hit.zdb_id:
3031236-X
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