title: Metal complex-substituted polysiloxanes as novel coatings for capillary electrophoresis and capillary electrochromatography.
abstract: Two novel polysiloxane-based polymers, which contain metal complexes, have been prepared. To prepare the Co(TACN)3+(2) (TACN= 1,4,7-triazacyclononane) based polymers, an orthoamide derivative of TACN was added to bromobutane-substituted methylpolysiloxane and hydrolyzed with base. Co(II) was then coordinated to the TACN, followed by cobalt oxidation to make polymer A or followed by N-octyl TACN coordination and cobalt oxidation to make polymer B. In both materials, TACN forms thermodynamically and kinetically stable Co(TACN)3+(2) complexes in which the six coordination sites of the Co(III) are occupied by nitrogens from the TACN. The polymers were coated on fused-silica capillary columns and spherical silica particles, which were used for capillary electrophoresis and capillary electrochromatography, respectively. The open and packed columns showed strong and pH-independent reversed electroosmotic flow.
authors.affiliation: Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602-5700, USA.
authors.forename: Qirong
authors.initials: Q
authors.lastname: Wu
authors.forename: Milton L
authors.initials: ML
authors.lastname: Lee
authors.forename: Roger G
authors.initials: RG
authors.lastname: Harrison
mesh_terms: D020374:Chromatography, Micellar Electrokinetic Capillary / Q000379:methods*; D019075:Electrophoresis, Capillary / Q000379:methods*; D007700:Kinetics; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D012833:Siloxanes / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D008024:Ligands; D012833:Siloxanes