TY  - JOUR
A1  - Ast, Sandra
A1  - Schwarze, Thomas
A1  - Müller, Holger
A1  - Sukhanov, Aleksey
A1  - Michaelis, Stefanie
A1  - Wegener, Joachim
A1  - Wolfbeis, Otto S.
A1  - Körzdörfer, Thomas
A1  - Dürkop, Axel
A1  - Holdt, Hans-Jürgen
T1  - A highly K+-Selective Phenylaza-[18]crown-6-Lariat-Ether-Based Fluoroionophore and its application in the sensing of K+ Ions with an optical sensor film and in cells
JF  - Chemistry - a European journal
N2  - Herein, we report the synthesis of two phenylaza-[18]crown-6 lariat ethers with a coumarin fluorophore (1 and 2) and we reveal that compound 1 is an excellent probe for K+ ions under simulated physiological conditions. The presence of a 2-methoxyethoxy lariat group at the ortho position of the anilino moiety is crucial to the substantially increased stability of compounds 1 and 2 over their lariat-free phenylaza-[18] crown-6 ether analogues. Probe 1 shows a high K+/Na+ selectivity and a 2.5-fold fluorescence enhancement was observed in the presence of 100 mm K+ ions. A fluorescent membrane sensor, which was prepared by incorporating probe 1 into a hydrogel, showed a fully reversible response, a response time of 150 s, and a signal change of 7.8% per 1 mm K+ within the range 1-10 mm K+. The membrane was easily fabricated (only a single sensing layer on a solid polyester support), yet no leaching was observed. Moreover, compound 1 rapidly permeated into cells, was cytocompatible, and was suitable for the fluorescent imaging of K+ ions on both the extracellular and intracellular levels.
KW  - crown compounds
KW  - fluorescence
KW  - gels
KW  - potassium
KW  - sensors
Y1  - 2013
U6  - https://doi.org/10.1002/chem.201302350
SN  - 0947-6539
SN  - 1521-3765
VL  - 19
IS  - 44
SP  - 14911
EP  - 14917
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Neumann, Bernhard
A1  - Horstkemper, Marianne
A1  - Krüger, Wolfgang
A1  - Wilkens, Martin
A1  - Bohlen, Andreas
A1  - Frübing, Peter
A1  - Wegener, Michael
A1  - Scheff, Ullrich
A1  - Neher, Dieter
A1  - Brehmer, Ludwig
A1  - Kleinpeter, Erich
A1  - Wolf, Gunter
A1  - Koetz, Joachim
A1  - Peter, Martin G.
A1  - Senkbeil, Sigrid
A1  - Meyer, Till
T1  - Portal = Im Trend: Physiker und Chemiker erforschen "Soft Matter"
BT  - Die Potsdamer Universitätszeitung
N2  - Aus dem Inhalt:
Im Trend: Physiker und Chemiker erforschen „Soft Matter“
-Brandenburger Netzwerk für Existenzgründer erhält Förderung
-Universität leistet Beitrag zum Romantik-Jahr
-Musiksender MTV und Bryan Adams auf dem Campus
T3  - Portal: Das Potsdamer Universitätsmagazin - 06/2002 
Y1  - 2002
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-501441
SN  - 1618-6893
VL  - 2002
ER  -