期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 30, 页码 12458-12461出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja305822e
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资金
- Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) [20111007]
- Grants-in-Aid for Scientific Research [20111007, 24619008] Funding Source: KAKEN
A macrocage molecule with a bridged phenylene rotor has been reported as a molecular gyrotop, because the rotor can rotate even in a crystalline state. Although the most stable cage structure of the molecular gyrotop in a crystal was folded and shrunken at low temperature, expansion of the cage was observed at high temperature due to rapid rotation of the phenylene in a crystal. This phenomenon is analogous to the deflation and inflation of a balloon. Moreover, the unusually large thermal expansion coefficient of the crystal was estimated in the temperature range in which the expansion of the cage was observed, indicating a new function of dynamic states of the molecules.
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