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Formation of nanotubes and secondary assemblies of cyclodextrins induced by BBOT |
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| Authors: | Zhang JingJing Shen XingHai Wu AiHua Zhang ChunFen Chen QingDe Gao HongCheng |
| Institution: | 1.Beijing National Laboratory for Molecular Sciences; Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science; College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China ; |
| Abstract: | The study of cyclodextrin nanotubes is a significant topic among the self-assembly behaviors of cyclodextrins. We report herein the interaction of 2,5-bis(5′-tert-butyl-2-benzoxazoyl)thiophene (BBOT) with α-, β-, γ-cyclodextrins (CDs). It has been discovered that the reaction patterns of BBOT with CDs are remarkably different. β-CD forms a simple inclusion complex with BBOT in a stoichiometry of 1:2 (guest:host). β-CD forms a 1:1 inclusion complex with BBOT at its low concentration. At higher concentration of BBOT, the nanotube and secondary assembly of β-CD are formed. As for γ-CD, the nanotube and secondary assembly are formed within the whole concentration range of BBOT studied. The structure of γ-CD nanotubes is different from that of β-CD nanotubes to a certain extent. |
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