科研之友
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摘要
We studied acetonitrile vapour inclusion behaviour for flexible single-crystal hosts [M-2(bza)(4)(pyz)](n) (M = Rh2+ (1), Cu2+ (2); bza = benzoate, pyz = pyrazine) by adsorption experiments and single-crystal X-ray analysis of the inclusion state. Independent of metal ions, the flexible single-crystal hosts smoothly and reversibly adsorbed acetonitrile molecules up to ca. 2 molecules per M-2 unit through an adsorption leap, which indicated the change of crystal phase transformations. The results showed that the acetonitrile inclusion crystals were isostructural with including acetonitrile molecules aligned in a head-to-tail fashion in a 1D channel. The acetonitrile molecules were densely included in the channel compared with those in an acetonitrile crystal, indicating that the flexible hosts provide a suitable field for observing the acetonitrile inclusion structure. While the inclusion crystal structure was independent of metal ions, the adsorption behaviour has a difference in the critical pressure and amount of the adsorption leap, depending on the metal ions in the host skeletons.
- 出版日期2010
