Park Jun Heuk, Paczesny Jan, Kim Namhun, Grzybowski Bartosz A
IBS Center for Soft and Living Matter and Department of Chemistry, UNIST, 50, UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan, South Korea.
Angew Chem Int Ed Engl. 2020 Jun 22;59(26):10301-10305. doi: 10.1002/anie.201910989. Epub 2020 Apr 15.
When components of a metal-organic framework (MOF) and a crystal growth modulator diffuse through a gel medium, they can form arrays of regularly-spaced precipitation bands containing MOF crystals of different morphologies. With time, slow variations in the local concentrations of the growth modulator cause the crystals to change their shapes, ultimately resulting in unusual concave microcrystallites not available via solution-based methods. The reaction-diffusion and periodic precipitation phenomena 1) extend to various types of MOFs and also MOPs (metal-organic polyhedra), and 2) can be multiplexed to realize within one gel multiple growth conditions, in effect leading to various crystalline phases or polycrystalline formations.
当金属有机框架（MOF）的组分和晶体生长调节剂在凝胶介质中扩散时，它们可以形成包含不同形态MOF晶体的规则间隔沉淀带阵列。随着时间的推移，生长调节剂局部浓度的缓慢变化会导致晶体改变其形状，最终产生通过基于溶液的方法无法获得的异常凹形微晶。反应扩散和周期性沉淀现象1）扩展到各种类型的MOF以及金属有机多面体（MOP），并且2）可以进行多路复用，以在一种凝胶内实现多种生长条件，实际上导致各种晶相或多晶形成。
