TY - JOUR
T1 - Alkyl modified anionic siloxanes as pseudostationary phases for electrokinetic chromatography
T2 - I. Synthesis and characterization
AU - Peterson, Dominic S.
AU - Palmer, Christopher P.
N1 - Funding Information:
The authors would like to thank Becky Redden who assisted in the preparation and analysis of IR and NMR samples. This work was funded by a Department of Energy (Sandia National Laboratories) Presidential Early Career Award for Scientists and Engineers.
PY - 2001/7/27
Y1 - 2001/7/27
N2 - Anionic water soluble siloxane polymers have been synthesized and characterized for electrokinetic chromatography. Siloxane polymers are of interest in electrokinetic chromatography because of the wide variety of chemistries that can be developed based on these backbones, including much of the stationary phase chemistry developed in the last 30 years. The siloxanes in this study have a sulfonate functional group. The siloxanes have different length alkyl chains (C8, C12, C18) attached to the backbone in differing densities. The methylene selectivity generally increases with increasing alkyl chain length and with increasing alkyl chain density. The electrophoretic mobility appears to pass through a maximum as more alkyl chain is added to the siloxane backbone. The efficiency also would seem to pass through a maximum as more alkyl chain is added. The chemical selectivities of the siloxane polymers are very different from sodium dodecyl sulfate but are similar to each other.
AB - Anionic water soluble siloxane polymers have been synthesized and characterized for electrokinetic chromatography. Siloxane polymers are of interest in electrokinetic chromatography because of the wide variety of chemistries that can be developed based on these backbones, including much of the stationary phase chemistry developed in the last 30 years. The siloxanes in this study have a sulfonate functional group. The siloxanes have different length alkyl chains (C8, C12, C18) attached to the backbone in differing densities. The methylene selectivity generally increases with increasing alkyl chain length and with increasing alkyl chain density. The electrophoretic mobility appears to pass through a maximum as more alkyl chain is added to the siloxane backbone. The efficiency also would seem to pass through a maximum as more alkyl chain is added. The chemical selectivities of the siloxane polymers are very different from sodium dodecyl sulfate but are similar to each other.
KW - Electrokinetic chromatography
KW - Ketones
KW - Pseudostationary phases
KW - Siloxane pseudostationary phases
KW - Surfactants
UR - http://www.scopus.com/inward/record.url?scp=0035958538&partnerID=8YFLogxK
U2 - 10.1016/S0021-9673(01)00759-2
DO - 10.1016/S0021-9673(01)00759-2
M3 - Article
C2 - 11521857
AN - SCOPUS:0035958538
SN - 0021-9673
VL - 924
SP - 103
EP - 110
JO - Journal of Chromatography A
JF - Journal of Chromatography A
IS - 1-2
ER -