The molecular recotwtion abilities of β-naphthoated β-CD derivatives as the host compounds were studied: 3-o-β-Naphthoyl-β-CD has a largely improved association constant with cyclohexanol than the corresponding 6-...The molecular recotwtion abilities of β-naphthoated β-CD derivatives as the host compounds were studied: 3-o-β-Naphthoyl-β-CD has a largely improved association constant with cyclohexanol than the corresponding 6-position substituted β-CD derivative has. On the other hand, the polarisablity and the sturcture of the gueset molecule are also important factors which affect the association constant. Cyclohexane may form the 1:2 type inclusion compound with the host compound in this report.展开更多
A chemical analytical method for quantitative determination in hydroxyethyl group of hydroxyethyl β cyclodextrin is proposed. The method consists of reacting hydroxyethyl β cyclodextrin with HI in the presence of ca...A chemical analytical method for quantitative determination in hydroxyethyl group of hydroxyethyl β cyclodextrin is proposed. The method consists of reacting hydroxyethyl β cyclodextrin with HI in the presence of catalyst on heating to form the corresponding amounts of ethene and iodoethane. Then react these compounds with bromine to give I 2, which can be easily determined by standard hyposulphite solution. The formulas for calculation of the average substitution degree from titration results are described. The results obtained by this method appeared to be more accurate than those based on 1H NMR method.展开更多
文摘The molecular recotwtion abilities of β-naphthoated β-CD derivatives as the host compounds were studied: 3-o-β-Naphthoyl-β-CD has a largely improved association constant with cyclohexanol than the corresponding 6-position substituted β-CD derivative has. On the other hand, the polarisablity and the sturcture of the gueset molecule are also important factors which affect the association constant. Cyclohexane may form the 1:2 type inclusion compound with the host compound in this report.
文摘A chemical analytical method for quantitative determination in hydroxyethyl group of hydroxyethyl β cyclodextrin is proposed. The method consists of reacting hydroxyethyl β cyclodextrin with HI in the presence of catalyst on heating to form the corresponding amounts of ethene and iodoethane. Then react these compounds with bromine to give I 2, which can be easily determined by standard hyposulphite solution. The formulas for calculation of the average substitution degree from titration results are described. The results obtained by this method appeared to be more accurate than those based on 1H NMR method.
