摘要
A new capillary gas chromatography stationary phase, monokis (2,6 di O benzyl 3 O propyl (3’)) hexakis(2,6 di O benzyl 3 O methyl) β CD bonded polysiloxane, was synthesized. It exhibited separation abilities to disubstituted benzene isomers and some chiral solutes. It was also found that the polarity of CD derivatives can be lowered both by chemically bonding it to polysiloxane and by diluting it in polysiloxane. The separation abilities of the polysiloxane anchored CDs (SP CD) are higher than that of the unbonded CDs (S CD) and the diluted S CD at lower column temperature. Hydrosilylation reaction is one of the best methods to lower the operating temperature of CDs.
合成了一种新的环糊精接枝聚硅氧烷衍生物 ,单环 (2 ,6 二 O 苄基 3 O 丙基 (3’) ) 六环 (2 ,6 二 O 苄基 3 O 甲基 ) β 环糊精接枝聚硅氧烷衍生物 ,并考察了其毛细管气相色谱性能 .结果表明其对一些二取代苯的位置异构体及一些光学异构体具有分离能力 ,是一种良好的毛细管气相色谱固定相 .研究发现将环糊精衍生物接枝聚硅氧烷以及将未接枝的环糊精衍生物与OV 7混涂均可降低环糊精衍生物的极性 .在较低的测试温度下 ,环糊精接枝聚硅氧烷固定相的分离能力比未接枝的环糊精衍生物及其与OV 7混涂固定相的分离能力强 ,而在高温下 ,三者的分离能力接近 .
基金
NationalNaturalScienceFoundationofChina (K2 97750 0 6 )
