关键词: 葫芦[7]脲, 气相色谱固定相, 填充柱, 色谱性能, 硅氧烷

Abstract: The synthesized and purified cucurbit[7]uril(CB[7]) was coated on a 102 white celite carrier under acidic conditions as a new gas chromatography(GC) stationary phase. The chemical structure of the CB[7] was characterized by infrared spectroscopy, mass spectrometry, elemental analysis and thermogravity analysis. The McReynolds constants of the new stationary phases were determined by using different probes in order to characterize its basic chromatographic property. The separation abilities of some aromatic hydrocarbons, halohydrocarbons, alcohols, ketones, esters, siloxanes were investigated on the packed column of CB[7] coated stationary phase, respectively. The results showed that new CB[7] stationary phase exhibited not only a good thermal stability and also a better separation selectivity for different analytes, indicating that the CB[7] stationary phase has a great potential in GC separations. Especially, some high boiling point esters and siloxanes can be successfully separated within 7 min. Additionally, the retention mechanism of the CB[7] stationary phase was also discussed.

Key words: Cucurbit[7]uril, gas chromatography stationary phase, packed column, chromatographic property, siloxanes