光电开关
光异构化
偶氮苯
连接器
光致变色
分子
金属有机骨架
壳体(结构)
化学
位阻效应
光化学
多孔性
化学工程
光催化
普鲁士蓝
材料科学
纳米技术
异构化
立体化学
有机化学
复合材料
物理化学
吸附
电化学
电极
计算机科学
工程类
操作系统
催化作用
作者
Dragos Mutruc,Alexis Goulet‐Hanssens,Sam Fairman,Sebastian Wahl,Annett Zimathies,Christopher Knie,Stefan Hecht
标识
DOI:10.1002/anie.201906606
摘要
A two-component core-shell UiO-68 type metal-organic framework (MOF) with a nonfunctionalized interior for efficient guest uptake and storage and a thin light-responsive outer shell was prepared by initial solvothermal MOF synthesis followed by solvent-assisted linker exchange. The bulky shell linker features two tetra-ortho-fluorinated azobenzene moieties to exploit their advantageous photoisomerization properties. The obtained perfect octahedral MOF single crystals can be switched repeatedly and with an unprecedented efficiency between E- and Z-rich states using visible light only. Due to the high photoswitch density per pore of the shell layer, its steric demand and thus molecular uptake (and release) can be conveniently modulated upon green and blue light irradiation. Therefore, the "smart" shell acts as a light-controlled kinetic barrier or "gate" for the diffusion of cargo molecules in and out of the MOF crystals.
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