TY  - JOUR
A1  - Schwarze, Thomas
A1  - Müller, Holger
A1  - Ast, Sandra
A1  - Steinbrück, Dörte
A1  - Eidner, Sascha
A1  - Geißler, Felix
A1  - Kumke, Michael Uwe
A1  - Holdt, Hans-Jürgen
ED  - Kumke, Michael Uwe
T1  - Fluorescence lifetime-based sensing of sodium by an optode
JF  - Chemical Communications
N2  - We report a 1,2,3-triazol fluoroionophore for detecting Na+ that shows in vitro enhancement in the Na+-induced fluorescence intensity and decay time. The Na+-selective molecule 1 was incorporated into a hydrogel as a part of a fiber optical sensor. This sensor allows the direct determination of Na+ in the range of 1–10 mM by measuring reversible fluorescence decay time changes.
KW  - ion optodes
KW  - sensors
KW  - indicators
KW  - chromoionophore
KW  - ionophore
KW  - membrane
KW  - switches
KW  - systems
KW  - samples
KW  - green
Y1  - 2014
SN  - 0022-4936
SN  - 0009-241X
SP  - 14167
EP  - 14170
PB  - The Royal Society Chemistry
CY  - Cambridge
ER  - 
TY  - GEN
A1  - Schwarze, Thomas
A1  - Müller, Holger
A1  - Ast, Sandra
A1  - Steinbrück, Dörte
A1  - Eidner, Sascha
A1  - Geißler, Felix
A1  - Kumke, Michael Uwe
A1  - Holdt, Hans-Jürgen
T1  - Fluorescence lifetime-based sensing of sodium by an optode
N2  - We report a 1,2,3-triazol fluoroionophore for detecting Na+ that shows in vitro enhancement in the Na+-induced fluorescence intensity and decay time. The Na+-selective molecule 1 was incorporated into a hydrogel as a part of a fiber optical sensor. This sensor allows the direct determination of Na+ in the range of 1–10 mM by measuring reversible fluorescence decay time changes.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 182 
KW  - ion optodes
KW  - sensors
KW  - indicators
KW  - chromoionophore
KW  - ionophore
KW  - membrane
KW  - switches
KW  - systems
KW  - samples
KW  - green
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-76785
SP  - 14167
EP  - 14170
PB  - The Royal Society of Chemistry
CY  - Cambridge
ER  - 
TY  - GEN
A1  - Niedl, Robert Raimund
A1  - Berenstein, Igal
A1  - Beta, Carsten
T1  - How imperfect mixing and differential diffusion accelerate the rate of nonlinear reactions in microfluidic channels
N2  - In this paper, we show experimentally that inside a microfluidic device, where the reactants are segregated, the reaction rate of an autocatalytic clock reaction is accelerated in comparison to the case where all the reactants are well mixed. We also find that, when mixing is enhanced inside the microfluidic device by introducing obstacles into the flow, the clock reaction becomes slower in comparison to the device where mixing is less efficient. Based on numerical simulations, we show that this effect can be explained by the interplay of nonlinear reaction kinetics (cubic autocatalysis) and differential diffusion, where the autocatalytic species diffuses slower than the substrate.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 253 
KW  - arsenious acid
KW  - fronts
KW  - paper
KW  - poly(dimethylsiloxane)
KW  - scale
KW  - systems
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-95810
SP  - 6451
EP  - 6457
ER  - 
TY  - JOUR
A1  - Niedl, Robert Raimund
A1  - Berenstein, Igal
A1  - Beta, Carsten
T1  - How imperfect mixing and differential diffusion accelerate the rate of nonlinear reactions in microfluidic channels
JF  - Physical chemistry, chemical physics : PCCP ; a journal of European Chemical Societies
N2  - In this paper, we show experimentally that inside a microfluidic device, where the reactants are segregated, the reaction rate of an autocatalytic clock reaction is accelerated in comparison to the case where all the reactants are well mixed. We also find that, when mixing is enhanced inside the microfluidic device by introducing obstacles into the flow, the clock reaction becomes slower in comparison to the device where mixing is less efficient. Based on numerical simulations, we show that this effect can be explained by the interplay of nonlinear reaction kinetics (cubic autocatalysis) and differential diffusion, where the autocatalytic species diffuses slower than the substrate.
KW  - arsenious acid
KW  - systems
KW  - poly(dimethylsiloxane)
KW  - fronts
KW  - scale
KW  - paper
Y1  - 2016
U6  - https://doi.org/10.1039/c6cp00224b
SN  - 1463-9076
SN  - 1463-9084
VL  - 18
SP  - 6451
EP  - 6457
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  -