期刊
TETRAHEDRON
卷 68, 期 23, 页码 4470-4478出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2011.11.079
关键词
Helicates; Double helix; Oligophenols; Spiroborate; Spring motion
资金
- Japan Society for the Promotion of Science (JSPS)
- MEXT [21111508]
- MEXT, Japan
- Grants-in-Aid for Scientific Research [21111508, 20225006] Funding Source: KAKEN
A new class of ortho- and meta-substituted tetraphenols at the terminal phenyl residues with a biphenylene unit in the middle were synthesized and the effect of the substitution position on the spiroborate-based double-stranded helicate formation with sodium borohydride was investigated. The ortho-substitution considerably hampered the spiroborate formation between the terminal biphenol units and the boron atoms, whereas the meta-substituted oligomers formed a double-stranded helicate bridged by spiroborate groups accommodating a sodium cation in the center, which displayed an extension and contraction motion triggered by the removal and addition of sodium ions in solution. (C) 2011 Elsevier Ltd. All rights reserved.
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