期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 11, 页码 5083-5089出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja206228n
关键词
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资金
- Spanish MICINN
- FEDER [MAT2007-61621, CSD2007-00010, MAT2011-27233-C02-02, CTQ2010-18414]
- CREST JST
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- [23245014]
- [22108512]
- Grants-in-Aid for Scientific Research [24750060, 22108512, 23245014] Funding Source: KAKEN
A quasielastic neutron scattering and solid-state H-2 NMR spectroscopy study of the polymeric spin-crossover compound {Fe(pyrazine)[Pt(CN)(4)]} shows that the switching of the rotation of a molecular fragment- the pyrazine ligand-occurs in association with the change of spin state. The rotation switching was examined on a wide time scale (10(-13)-10(-3) s) by both techniques, which clearly demonstrated the combination between molecular rotation and spin-crossover transition under external stimuli (temperature and chemical). The pyrazine rings are seen to perform a 4-fold jump motion about the coordinating nitrogen axis in the high-spin state. In the low-spin state, however, the motion is suppressed, while when the system incorporates benzene guest molecules, the movements of the system are even more restricted.
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