Selective and pH-Independent Detection of Ba 2+ in Water by a Benzo-21-crown-7-Functionalized BODIPY.

Autor: Sprenger T; Medizinische Fakultät, HMU Potsdam, Olympischer Weg 1, 14471, Potsdam, Germany., Schwarze T; Institut für Chemie, Anorganische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany., Müller H; Institut für Chemie, Anorganische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany., Sperlich E; Institut für Chemie, Anorganische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany., Holdt HJ; Institut für Chemie, Anorganische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany., Nazaré M; Leibniz-Institut für Molekulare Pharmakologie (FMP), Robert-Rössle-Str. 10, 13125, Berlin-Buch, Germany., Hentsch A; Leibniz-Institut für Molekulare Pharmakologie (FMP), Robert-Rössle-Str. 10, 13125, Berlin-Buch, Germany., Eidner S; Institut für Chemie, Physikalische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany., Kraft R; Institut für Chemie, Physikalische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany., Kumke MU; Institut für Chemie, Physikalische Chemie, Universität Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Golm, Germany.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2023 Oct 09; Vol. 29 (56), pp. e202301622. Date of Electronic Publication: 2023 Sep 07.
DOI: 10.1002/chem.202301622
Abstrakt: Herein, we report on highly Ba 2+ selective fluorescence sensing in water by a fluorescent probe consisting of a benzo-21-crown-7 as a Ba 2+ binding unit (ionophore) and a tetramethylated BODIPY fluorophore as a fluorescence reporter. This fluorescent probe showed a Ba 2+ induced fluorescence enhancement (FE) by a factor of 12±1 independently of the pH value and a high Ba 2+ sensitivity with a limit of detection (LOD) of (17.2±0.3) μM. Moreover, a second fluorescent probe consisting of the same BODIPY fluorophore, but a benzo-18-crown-6 as a cation-responsive binding moiety, showed an even higher FE upon Ba 2+ complexation by a factor of 85±3 and a lower LOD of (13±3) μM albeit a lower Ba 2+ selectivity. The fluorescence sensing mechanism of Ba 2+ was further investigated by time-resolved fluorescence as well as transient absorption spectroscopy (TAS) and it turned out that within these probes a blocking of a photoinduced electron transfer (PET) by Ba 2+ is very likely responsible for the FE.
(© 2023 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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