Uncovering two kinetic factors in the controlled growth of topologically distinct core–shell metal–organic frameworks

Autor:	Yuqian Pang, Hongliang Wang, Haoxin Huang, Tao Li, Chia-Kuang Tsung, Chunhui Wu, Sanfeng He, Songwei Zhang, Fang Wang
Rok vydání:	2019
Předmět:	Materials science 010405 organic chemistry Ligand Kinetics Nucleation General Chemistry 010402 general chemistry 01 natural sciences 0104 chemical sciences Chemical physics Surface modification Nanorod Metal-organic framework Dissolution Topology (chemistry)
Zdroj:	Chemical Science. 10:7755-7761
ISSN:	2041-6539 2041-6520
Popis:	Constructing core–shell metal–organic frameworks (MOFs) based on two topologically distinct MOFs is a great way to increase MOF material complexity and explore their new functions. However, such a nucleation process is energetically less favored compared to epitaxial growth due to mismatched unit cell parameters. Here, two kinetic factors, nucleation kinetics and dissolution kinetics, are revealed to be two key factors in overcoming this challenge. Through kinetic control, we demonstrate the growth of 4 types of Zr/Hf-MOF shells uniformly and contiguously on 7 different core MOFs including ZIF-8, an acid labile core. Taking advantage of the modular synthesis of Zr-MOFs, we demonstrate that post-synthetic covalent surface modification on a non-functionalizable MOF surface can be made possible through core–shell construction. We also demonstrated that the size selective catalytic behavior can be systematically tuned through changing either the ligand length or ligand functionality.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5ad58d1533c4eb532c5605425e0219bc https://doi.org/10.1039/c9sc02576f Zobrazit plný text záznamu