Creating Hierarchical Pores by Controlled Linker Thermolysis in Multivariate Metal-Organic Frameworks

Liang Feng, Shuai Yuan, Liang-Liang Zhang, Kui Tan, Jia-Luo Li, Angelo Kirchon, Lingmei Liu, Peng Zhang, Yu Han, Yves J. Chabal, Hong-Cai Zhou

Research output: Contribution to journalArticlepeer-review

120 Scopus citations

Abstract

Sufficient pore size, appropriate stability and hierarchical porosity are three prerequisites for open frameworks designed for drug delivery, enzyme immobilization and catalysis involving large molecules. Herein, we report a powerful and general strate-gy, linker thermolysis, to construct ultra-stable hierarchically porous metal−organic frameworks (HP-MOFs) with tunable pore size distribution. Linker instability, usually an undesirable trait of MOFs, was exploited to create mesopores by generating crystal defects throughout a microporous MOF crystal via thermolysis. The crystallinity and stability of HP-MOFs remain after thermolabile linkers are selectively removed from multivariate metal-organic frameworks (MTV-MOFs) through a decarboxyla-tion process. A domain-based linker spatial distribution was found to be critical for creating hierarchical pores inside MTV-MOFs. Furthermore, linker thermolysis promotes the formation of ultra-small metal oxide (MO) nanoparticles immobilized in an open framework that exhibits high catalytic activity for Lewis acid catalyzed reactions. Most importantly, this work pro-vides fresh insights into the connection between linker apportionment and vacancy distribution, which may shed light on prob-ing the disordered linker apportionment in multivariate systems, a long-standing challenge in the study of MTV-MOFs.
Original languageEnglish (US)
Pages (from-to)2363-2372
Number of pages10
JournalJournal of the American Chemical Society
Volume140
Issue number6
DOIs
StatePublished - Jan 30 2018

Fingerprint Dive into the research topics of 'Creating Hierarchical Pores by Controlled Linker Thermolysis in Multivariate Metal-Organic Frameworks'. Together they form a unique fingerprint.

Cite this