A Phenalenone-based Fluorescent Probe for the Detection of Fe<SUP>3+</SUP> ions

ÜÇÜNCÜ M.

JOURNAL OF FLUORESCENCE, vol.33, no.2, pp.707-712, 2023 (SCI-Expanded, Scopus) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 2
  • Publication Date: 2023
  • Doi Number: 10.1007/s10895-022-03117-8
  • Journal Name: JOURNAL OF FLUORESCENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Biotechnology Research Abstracts, Chimica, Compendex, MEDLINE
  • Page Numbers: pp.707-712
  • Keywords: Phenalenone, Fe3+ ions, Fluorescent probe, C = N hydrolysis
  • Dokuz Eylül University Affiliated: No

Abstract

A phenalenone based "turn on " probe was developed for selective and sensitive detection of Fe3+ ions in aqueous solutions. The thiophene-2-carboxaldehyde (receptor unit) was integrated into the 6-amino-1-phenalenone (6-AP) (signal reporter unit) through the C = N bond formation. The probe, 6-APT, operated through subsequent hydrolysis of the C = N bond induced by the coordination of Fe3+ ions to the heteroatoms to form highly fluorescent 6-AP. The probe displayed remarkable characteristics such as rapid response time (< 1 min), high analyte selectivity, and low limit of detection (1.3 mu M). The sensing approach offered an accurate method for the detection of Fe3+ ions in real water samples (tap water and drinking water). In addition to the fluorometric response, the presence of Fe3+ ions can be monitored under daylight by the change in the color of the solution. Importantly, this study is the first example of a phenalenone-based sensor developed for metal ion sensing in literature.