TY  - JOUR
A1  - Rauk, Erika
A1  - Kotzev, Anton
A1  - Laschewsky, André
A1  - Palmer, Christopher P.
T1  - Cationic and perfluorinated polymeric pseudostationary phases for electrokinetic chromatography
N2  - Separation selectivity in electrokinetic chromatography (EKC) is directly affected by the chemistry and solvent characteristics of the pseudostationary phase (PSP). The chemical selectivity of micellar PSPs has been previously demonstrated to vary significantly between anionic and cationic surfactants as well as between hydrocarbon and fluorocarbon surfactants. Polymeric PSPs have also been demonstrated to provide unique selectivity. In the current study, four cationic polymeric pseudo-stationary phases, two of which have perfluorinated pendant groups, are introduced and characterized as PSPs in EKC. Their performance and selectivity is compared to conventional micellar PSPs with similar structure. The solvation characteristics and selectivity of the four polymers most closely resemble those observed for cationic micelles. The polymers are all more cohesive and more polar than their hydrocarbon micellar counterparts. The fluorocarbon PSPs did show preferential interaction with fluorocarbon solutes, were somewhat more cohesive, and were stronger hydrogen bond donors. However, the presence of fluorocarbon moieties did not have as dramatic an effect on selectivity as was observed and published previously for fluorocarbon micelles. This may result from the selectivity being dominated by the presence of the cationic head groups or from the fluorocarbon character of the pendant groups being moderated by the presence of hydrocarbon functionality on the polymer back-bones.
Y1  - 2006
UR  - http://www.sciencedirect.com/science/journal/00219673
U6  - https://doi.org/10.1016/j.chroma.2005.07.114
SN  - 0021-9673
ER  - 
TY  - JOUR
A1  - Szczubialka, K.
A1  - Moczek, Lukasz
A1  - Goliszek, A.
A1  - Nowakowska, M.
A1  - Kotzev, Anton
A1  - Laschewsky, André
T1  - Characterization of hydrocarbon and fluorocarbon microdomains formed in aqueous solution of associative polymers : a molecular probe technique
N2  - Fluorocarbon associative polymers of the polysoap type were studied using two fluorescent probes, 1- octanoylpyrene (OcPyH) and 1-perfluorooctanoylpyrene (OcPyF). In aqueous solution the polymers formed hydrophobic domains composed of hydrocarbon, fluorocarbon or both types of polymeric side chains, which could solubilize the probes. This resulted in the appearance of new fluorescence emission bands and changes in the fluorescence polarization of the probes. The differences in the solubilization properties of the polymers are discussed. (c) 2005 Elsevier B.V. All rights reserved
Y1  - 2005
SN  - 0022-1139
ER  - 
TY  - JOUR
A1  - Kotzev, Anton
A1  - Laschewsky, André
A1  - Adriaensens, Pieter
A1  - Gelan, Jan
T1  - Micellar Polymers with Hydrocarbon and Fluorocarbon Hydrophobic Chains : a Strategy to Multicompartment Micelles
N2  - Cationic ionenes bearing hydrophobic side chains were synthesized, which behave as micellar polymers of the polysoap type. The hydrophobic chains were either hydrocarbons or fluorocarbons, or a mixture of both, in the form of statistical as well as block copolymers. These amphiphilic polymers were studied and compared with each other and with low molar mass analogous surfactants, especially with respect to their hydrophobic association in aqueous solution. The particular molecular structure of the ionenes synthesized results in polymeric surfactants with high mobility of the fluorocarbon chains. Most noteworthy, the behavior of the hydrocarbon-fluorocarbon block copolymer soaps in aqueous solution indicates microphase separation into hydrocarbon-rich and fluorocarbon-rich hydrophobic domains, thus yielding multicompartment micelles.
Y1  - 2002
ER  -