A New «off-on¼ Fluorescence Zinc Ion Sensors Based on Iodo- and Bromosubstituted Dipyrromethenes.
J Fluoresc
; 31(2): 415-425, 2021 Mar.
Article
en En
| MEDLINE
| ID: mdl-33410087
Monoiodo- and dibromsubstituted dipyrromethenes HL1 - HL3 were described as a highly sensitive and selective «Off-On¼ fluorescent chemosensor for Zn2+ based on the chelation-enhanced fluorescence (CHEF) effect. Сoordination reactions of HL1 - HL3 with Zn2+ cations are accompanied by a significant (124 to 215-fold) increase in fluorescence intensity against the background of other metal ions in the binary propanol-1/cyclohexane mixture (1:30). The fluorometric detection limit of Zn2+ ions using HL1 - HL3 sensors is from 3.0â10-8 to 3.3·10-9 mol/L. The presence of Na+, K+, Ca2+, Mg2+, Mn2+, Ni2+, Co2+, Pb2+ cations does not interfere with the detection of Zn2+. Complexation reactions are accompanied by a visual change in the color of the solution from yellow-orange to pink-raspberry so that the HL1 - HL3 ligands can also be used as a «naked-eye¼ indicators of the presence of Zn2+ ions.
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Colección:
01-internacional
Base de datos:
MEDLINE
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En
Revista:
J Fluoresc
Asunto de la revista:
BIOFISICA
Año:
2021
Tipo del documento:
Article
País de afiliación:
Rusia
Pais de publicación:
Países Bajos