title: High-performance polymer-based monolithic capillary column.
abstract: In this report, we introduce a new entry of high-performance polymer-based monolithic capillary column for mainly small molecules. This capillary column was prepared using a newly introduced epoxy monomer with diamines. Simply heat-induced polycondensation in an appropriate porogenic solvent afforded a really homogeneous co-continuous monolithic structure having submicrometer-size skeletons with micrometer-size through-pores. We were also able to prepare chiral monolithic columns using a chiral epoxy monomer as well as a chiral diamine. A 21.5-cm-long, 100-mum-i.d. column afforded up to 40 000 theoretical plate numbers (N) for alkylbenzenes in 60% aqueous acetonitrile as a reversed-phase-mode stationary phase. Due to a quite low column pressure drop, a 150-cm-long column was prepared. This long column afforded up to 200 000 plates for alkylbenzenes with only a 4-MPa column pressure drop. In contrast, in 100% acetonitrile, this column has "HILIC" property to show up to 60 000 plates for methanol with a 17.5-cm-long column. In this mode, we were able to separate nucleic acids. In addition, we have prepared a chiral column with both of the chiral epoxy monomers and an amine. This column was able to chirally discriminate a racemic alcohol in a reversed-phase mode.
authors.affiliation: Department of Polymer Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. kenpc@kit.ac.jp
authors.forename: Ken
authors.initials: K
authors.lastname: Hosoya
authors.forename: Natsuki
authors.initials: N
authors.lastname: Hira
authors.forename: Katsuya
authors.initials: K
authors.lastname: Yamamoto
authors.forename: Masaru
authors.initials: M
authors.lastname: Nishimura
authors.forename: Nobuo
authors.initials: N
authors.lastname: Tanaka