Binding ability and assembly behavior of β-cyclodextrin complexes with 2,2'-dipyridine and 4,4'-dipyridine
Two channel-type supramolecular aggregations 1 and 2 were prepared by the inclusion complex of â-cyclodextrin with 2,2′-dipyridine and 4,4′-dipyridine, respectively, and their binding ability and...
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| Main Authors: | , , , , |
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| 格式: | Article |
| 出版: |
2011
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| 主題: | |
| 在線閱讀: | https://hdl.handle.net/10356/94278 http://hdl.handle.net/10220/6994 |
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| 總結: | Two channel-type supramolecular aggregations 1 and 2 were prepared by the inclusion complex of â-cyclodextrin with 2,2′-dipyridine and 4,4′-dipyridine, respectively, and their binding ability and
assembly behavior were investigated comprehensively by X-ray crystallography,
1
H NMR, circular
dichroism spectra, and microcalorimetric titration in solution and the solid state. The obtained
results revealed that the hydrogen bonds and ð-ð stacking interactions are crucial factors for the
formation of the molecular aggregations containing â-cyclodextrin and dipyridines. The disparity
of nitrogen atom position in dipyridines leads not only to the distinct crystal system and space
group, i.e., monoclinic system (C2) for 1 and triclinic system (P-1) for 2, but also different binding
modes and thermodynamical parameters upon complexation of 2,2′-dipyridine and 4,4′-dipyridine
with â-cyclodextrin in aqueous solution |
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