Abylgazina Leila, Senkovska Irena, Bon Volodymyr, Bönisch Nadine, Maliuta Mariia, Kaskel Stefan
Chair of Inorganic Chemistry I, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany.
Chem Commun (Camb). 2024 Jul 23;60(60):7745-7748. doi: 10.1039/d4cc01657b.
Crystal size engineering allows tailoring of flexible metal-organic frameworks (MOFs) to achieve new properties. The gating type flexibility of the DUT-8(Zn) ([Zn(2,6-ndc)(dabco)], 2,6-ndc = 2,6-naphthalene dicarboxylate, dabco = 1,4-diazabicyclo-[2.2.2]-octane) compound is known to be extremely particle size sensitive. Here, the physisorption of ethanol vapor gives rise to so-called shape-memory effect, leading to rigidification and flexibility suppression. According to powder X-ray diffraction and nitrogen physisorption experiments, the open pore phase is retained selectively after desorption of alcohols, which could be attributed to the nano-structuring and surface deformation of the crystals as a result of exposure to alcohols.
晶体尺寸工程可实现对柔性金属有机骨架（MOF）的定制，以获得新的性能。已知DUT-8(Zn)（[Zn(2,6-ndc)(dabco)]，2,6-ndc = 2,6-萘二甲酸，dabco = 1,4-二氮杂双环-[2.2.2]-辛烷）化合物的门控型柔性对粒径极其敏感。在此，乙醇蒸汽的物理吸附产生了所谓的形状记忆效应，导致刚性化和柔性抑制。根据粉末X射线衍射和氮气物理吸附实验，醇类脱附后选择性地保留了开孔相，这可归因于晶体因接触醇类而产生的纳米结构化和表面变形。
