Lee Sujeong, Oh Sojin, Oh Moonhyun
Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea.
Angew Chem Int Ed Engl. 2020 Jan 13;59(3):1327-1333. doi: 10.1002/anie.201912986. Epub 2019 Dec 4.
The structural, compositional, and morphological features of metal-organic frameworks (MOFs) govern their properties and applications. Construction of hybrid MOFs with complicated structures, components, or morphologies is significant for the development of well-organized MOFs. An advanced route is reported for construction of atypical hybrid MOFs with unique morphologies and complicated components: 1) MOF-on-MOF growth of a 3D zeolitic imidazolate framework (ZIF) on a ZIF-L template, 2) etching of a part of the 2D ZIF-L template, and 3) structural transformation of 2D ZIF-L into 3D ZIF. The formation of core-shell-type MOF rings and plates is controlled by regulating the three processes. The formation route for the core-shell-type MOF rings and plates was monitored by tracking changes in morphology, structure, and composition. Carbon materials prepared from the pyrolysis of the core-shell-type hybrid MOFs displayed enhanced oxygen reduction reaction activities compared to their monomeric counterparts.
金属有机框架材料（MOFs）的结构、组成和形态特征决定了它们的性质和应用。构建具有复杂结构、组成或形态的杂化MOFs对于有序MOFs的发展具有重要意义。本文报道了一种构建具有独特形态和复杂组成的非典型杂化MOFs的先进方法：1）在ZIF-L模板上进行三维沸石咪唑酯骨架（ZIF）的逐层生长；2）蚀刻二维ZIF-L模板的一部分；3）将二维ZIF-L结构转变为三维ZIF。通过调节这三个过程来控制核壳型MOF环和板的形成。通过跟踪形态、结构和组成的变化来监测核壳型MOF环和板的形成途径。与单体对应物相比，由核壳型杂化MOFs热解制备的碳材料表现出增强的氧还原反应活性。
