Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan.
Dalton Trans. 2011 Dec 28;40(48):12826-31. doi: 10.1039/c1dt10956a. Epub 2011 Oct 19.
The crystal structure of an N(2)-encapusulated MOF, which is stable under open-air conditions at ambient temperature, was determined by single-crystal X-ray diffraction at 123 K. The crystal MOF of HSm{V(IV)O(TPPS)} designed to have 1-D channels periodically constricted by porphyrins planes adsorbed N(2) at 77 K. The adsorbed N(2) molecules remained in the 1-D channels even after warming to ambient temperature. The single-crystal structure of HSm{V(IV)O(TPPS)}⊃N(2) determined by X-ray diffraction indicated that N(2) molecules trapped in the constricted parts block other N(2) molecules in 1-D channels from escaping from the MOF. Such a unique encapsulation mode provides a promising approach toward designing novel MOFs with high gas storage capacity at ambient temperature.
通过在 123 K 下进行单晶 X 射线衍射，确定了在常温常压下稳定的 N(2)包封 MOF 的晶体结构。设计的 HSm{V(IV)O(TPPS)} 晶体 MOF 具有周期性被卟啉平面限制的 1-D 通道，可在 77 K 下吸附 N(2)。吸附的 N(2)分子在升温至常温后仍保留在 1-D 通道中。通过 X 射线衍射确定的 HSm{V(IV)O(TPPS)}⊃N(2)的单晶结构表明，被困在受限部分的 N(2)分子阻止了 1-D 通道中的其他 N(2)分子从 MOF 中逸出。这种独特的封装模式为设计在常温下具有高气体存储容量的新型 MOF 提供了一种有前途的方法。
