| 초록 |
Mesoporous glass beads and 5μm silica particles were modified with beta-cyclodextrin (β-CD) by means of directly bonding, linking spacer group, and cross-linking agent. The selectivities of the β-CD modified silica particles were measured using a simple column chromatography to separate a model mixture of 1- and 2-hydroxy-naphthalene (naphthols) and ortho, meta, and para-xylene. In the packed column chromatograp! hy experiments, two major controlling factors (inclusion complex formation effect and steric hindrance effect of the analytes) on the separations were observed. The selectivity of the β-CD directly bonded glass beads having the elution order ortho>para>meta-xylene; 2-naphthol>1-naphthol. The phenomena of β-CD pore blocking and narrowing by spacer groups and cross-linking agent were observed. The spacer group and cross-linking agent decreased inclusion complex formation of para-xylene and increased that of ortho-xylene. |
