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Synthesis and Characterization of Long Chain Alkyl Stationary Phases on a Silica Hydride Surface
Chromatographia (1998)
  • J. J. Pesek, San Jose State University
  • Maria T. Matyska-Pesek, San Jose State University
  • S. Takhar, San Jose State University
Abstract

C22 and C30 alkyl chains were attached to a silica hydride surface by a hydrosolation reaction. In each case both moieties were successfully bonded by either metal complex catalysis or free radical initiation. Carbon analysis, DRIFT spectra and13C CP-MAS NMR spectra confirm the bonding of the olefin to silica hydride. Conditions for maximum coverage were determined by a simplex procedure. Chromatographic evaluation of these long chain bonded phases was accomplished by separations of several types of mixtures: alkyl substituted benzenes; polycyclic aromatic hydrocarbons; carotenoids, tocopherols; tricyclic antidepressants; and peptides. The C30 column proved significantly better for separating the carotenoid and antidepressant mixtures and somewhat better for the peptide sample.

Disciplines
Publication Date
1998
Publisher Statement
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Citation Information
J. J. Pesek, Maria T. Matyska-Pesek and S. Takhar. "Synthesis and Characterization of Long Chain Alkyl Stationary Phases on a Silica Hydride Surface" Chromatographia Vol. 48 Iss. 9-10 (1998)
Available at: http://works.bepress.com/maria_matyska-pesek/88/