Luminescent properties of 4-aminobenzo-15-crown-5 after preferential binding of ferric ions in aqueous solutions.
Luminescence
; 32(4): 549-554, 2017 Jun.
Article
en En
| MEDLINE
| ID: mdl-27730739
ABSTRACT
We report a combined approach that introduces the use of 4-aminobenzo-15-crown-5 (4AB15C5) for the detection of ferric(III) ions by colorimetric, ultraviolet (UV)-visible light absorption, fluorescence, and live-cell imaging techniques along with density functional theory (DFT) calculations. We have found that 4AB15C5 is sensitive and selective for binding ferric(III) ions in aqueous solutions. DFT calculations using the polarizable continuum model have been used to explain the strong binding of the ferric ion by 4AB15C5 in aqueous solutions. The detection limit in the fluorescence quenching measurements was found to be as low as 50 µM for the ferric ion with a determined Stern-Volmer constant of 1.52 × 104 M-1 . Fluorescence intensity did not change for other ions tested, Fe2+ , Co2+ , Mn2+ , Mg2+ , Zn2+ , Ca2+ , NH4+ , Na+ , and K+ ions. Live-cell fluorescence imaging was also used to check the intracellular variations in ferric ion levels. Our spectroscopic data indicated that 4AB15C5 can bind ferric ions selectively in aqueous solutions.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Compuestos Corona
/
Sustancias Luminiscentes
/
Hierro
/
Compuestos de Anilina
Tipo de estudio:
Diagnostic_studies
Límite:
Humans
Idioma:
En
Revista:
Luminescence
Asunto de la revista:
BIOFISICA
/
BIOQUIMICA
Año:
2017
Tipo del documento:
Article