Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo 001-0021, Japan.
J Am Chem Soc. 2020 Aug 19;142(33):14069-14073. doi: 10.1021/jacs.0c06615. Epub 2020 Aug 6.
A photochemically crushable and regenerative metal-organic framework () was developed by complexation of photochromic ligand and 5-nitroisophthalate (nip) with Cd in DMF/MeOH. ([Cd(nip)()(HO)(DMF)]) was obtained as colorless crystals. Its crystal structure revealed that adopts a tubular structure with interlocked coordination networks and can accommodate guest molecules in its one-dimensional pores. When suspended in DMF/MeOH was exposed to UV light, its crystalline network, though thermally stable up to 260 °C, was readily crushed to afford a homogeneous blue-colored solution, via ring-closing isomerization of the constituent ligand into . Upon successive exposure of this solution to visible light, colorless MOF crystals identical to those of were regenerated. Light-responsive enabled highly efficient on-demand guest release.
一种光致压碎和再生的金属有机骨架（）通过光致变色配体 与 Cd 在 DMF/MeOH 中的络合合成。得到无色晶体[Cd(nip)()(HO)(DMF)]。其晶体结构表明，采用互锁的配位网络的管状结构，可在其一维孔中容纳客体分子。当 悬浮在 DMF/MeOH 中并暴露于紫外光下时，尽管其晶体网络在高达 260°C 时热稳定，但通过组成 配体的闭环异构化为 ，很容易压碎为均匀的蓝色溶液。当将该溶液连续暴露于可见光下时，可再生出与 相同的无色 MOF 晶体。光响应性可实现高效按需释放客体。
