期刊
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
卷 23, 期 1, 页码 104-110出版社
SPRINGER
DOI: 10.1007/s10904-012-9747-z
关键词
Porous coordination polymers; Metal-organic frameworks; Spin-crossover
资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan [22108512, 23245014]
- JSPS
Three porous coordination polymers {Fe(dpa)[Pt(CN)(4)]center dot G center dot nH(2)O} (1-G; dpa = 1,2-di(4-pyridyl)ethane, G = dpa, bibenzyl (bbz) and stilbene (stb)) have been prepared by using a long and flexible ligand dpa. These compounds formed analogous 3-D elongated Hofmann-type frameworks based on 2-D planar layers extended by Pt-CN-Fe linkages with dpa as flexible pillar ligands. 1-dpa showed a characteristic three-step spin transition (ST) in the temperature range 180-240 K. The ST behavior was reversibly modulated by dehydration and hydration processes in keeping with the three steps. 1-bbz and 1-stb exhibited a gradual three-step ST over the range 80-200 K and an abrupt ST with T (c) = 163 K. The guest-dependent cooperativity of the ST behavior is discussed by considering the flexibility of the framework and guest molecules.
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