Abstract

A new soluble cyclodextrin derivative 6- O-(2-hydroxybutyl)-β-cyclodextrin (6-HB-β-CD) was prepared. Its molecular binding and recognition ability were investigated with the comparison of β-cyclodextrin (β-CD), 2- O-(2-hydroxypropyl)-β-cyclodextrin (2-HP-β-CD), 6- O-(2-hydroxypropyl)-β-cyclodextrin (6-HP-β-CD), and 2- O-(2-hydroxybutyl)-β-cyclodextrin (2-HB-β-CD). The relationship between the complex stability constants and the possible structures of inclusion compounds was discussed with the interaction of hosts and guests, including the weak hydrophobic interactions, the size/shape matching, the steric hindrance, and the hydrophilic property.

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