Strong guest binding by cyclodextrin hosts in competing nonpolar solvents and the unique crystalline structure |
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| Authors: | Kida Toshiyuki Iwamoto Takuya Fujino Yoshinori Tohnai Norimitsu Miyata Mikiji Akashi Mitsuru |
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| Affiliation: | Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan. |
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| Abstract: | 6-O-Modified β-cyclodextrins, such as heptakis(6-O-triisopropylsilyl)-β-cyclodextrin (TIPS-β-CD) and heptakis(6-O-tert-butyldimethylsilyl)-β-cyclodextrin (TBDMS-β-CD), formed 2:1 inclusion complexes with pyrene in benzene and cyclohexane with high association constants. The X-ray crystalline structure of the TIPS-β-CD-pyrene complex obtained from the benzene solution showed that one pyrene molecule was incorporated in the form of a sandwich-type complex with two benzene molecules within the cavity of the dimer formed by two TIPS-β-CD molecules. |
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