Fu Hong-Ru, Zhang Jian
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002 (P. R. China); University of Chinese Academy of Sciences, 100049, Beijing (P. R. China).
Chemistry. 2015 Apr 7;21(15):5700-3. doi: 10.1002/chem.201406323. Epub 2015 Feb 27.
A three-dimensional metal-organic framework (MOF) was synthesized by combining 4-pyrazolecarboxylic acid and adenine. This MOF exhibits reversible flexibility and breathing adsorption behaviors in response to light hydrocarbons, with high capacity. The flexibility of the structural transitions was studied on the molecular scale by obtaining the crystal structures at 303, 353 and 373 K. The bridging nitrogen atoms of the pyrazolate rings act as a "kneecap" around the M⋅⋅⋅M axis, which causes the rotation of ligands around the M⋅⋅⋅M axis in response to external stimulus, thus giving rise to the deformation of the framework structure.
通过将4-吡唑羧酸和腺嘌呤结合合成了一种三维金属有机框架（MOF）。这种MOF对轻烃表现出可逆的柔韧性和呼吸吸附行为，具有高容量。通过在303、353和373 K下获得晶体结构，在分子尺度上研究了结构转变的柔韧性。吡唑环的桥连氮原子在M⋅⋅⋅M轴周围充当“膝盖骨”，这导致配体响应外部刺激围绕M⋅⋅⋅M轴旋转，从而引起框架结构的变形。
