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Title: Creating Hierarchical Pores by Controlled Linker Thermolysis in Multivariate Metal–Organic Frameworks

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.7b12916· OSTI ID:1470336

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. In this work, we report a powerful and general strategy, linker thermolysis, to construct ultrastable 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 decarboxylation 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 ultrasmall metal oxide nanoparticles immobilized in an open framework that exhibits high catalytic activity for Lewis acid-catalyzed reactions. Lastly and most importantly, this work provides fresh insights into the connection between linker apportionment and vacancy distribution, which may shed light on probing the disordered linker apportionment in multivariate systems, a long-standing challenge in the study of MTV-MOFs.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Gas Separations Relevant to Clean Energy Technologies (CGS)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001015; FG02-08ER46491; FE0026472
OSTI ID:
1470336
Journal Information:
Journal of the American Chemical Society, Vol. 140, Issue 6; Related Information: CGS partners with University of California, Berkeley; University of California, Davis; Lawrence Berkeley National Laboratory; University of Minnesota; National Energy Technology Laboratory; Texas A&M University; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 233 works
Citation information provided by
Web of Science

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Robust synthesis routes and porosity of the Al-based metal–organic frameworks Al-fumarate, CAU-10-H and MIL-160 journal January 2019
The chemistry of multi-component and hierarchical framework compounds journal January 2019
From fundamentals to applications: a toolbox for robust and multifunctional MOF materials journal January 2018
A composite of Fe 3 O 4 @C and multilevel porous carbon as high-rate and long-life anode materials for lithium ion batteries journal May 2019
Construction of Hierarchically Porous Nanoparticles@Metal-Organic Frameworks Composites by Inherent Defects for the Enhancement of Catalytic Efficiency journal October 2018
Effective loading of cisplatin into a nanoscale UiO-66 metal–organic framework with preformed defects journal January 2019
High temperature expulsion of thermolabile groups for pore-space expansion in metal–organic frameworks journal January 2019
Hierarchically porous UiO-66: facile synthesis, characterization and application journal January 2018
Two Cu x I y -based copper–organic frameworks with multiple secondary building units (SBUs): structure, gas adsorption and impressive ability of I 2 sorption and release journal January 2019
Crackled nanocapsules: the “imperfect” structure for enzyme immobilization journal January 2019
Generation of Hierarchical Porosity in Metal-Organic Frameworks by the Modulation of Cation Valence journal June 2019
Hierarchical Micro‐ and Mesoporous Zn‐Based Metal–Organic Frameworks Templated by Hydrogels: Their Use for Enzyme Immobilization and Catalysis of Knoevenagel Reaction journal September 2019
Self-assembled soft nanoparticle membranes with programmed free volume hierarchy journal January 2018
Modulation versus Templating: Fine‐Tuning of Hierarchally Porous PCN‐250 Using Fatty Acids To Engineer Guest Adsorption journal July 2019
Direct water-based synthesis and characterization of new Zr/Hf-MOFs with dodecanuclear clusters as IBUs journal January 2018
Constructing new metal–organic frameworks with complicated ligands from “One-Pot” in situ reactions journal January 2019
Modulation versus Templating: Fine‐Tuning of Hierarchally Porous PCN‐250 Using Fatty Acids To Engineer Guest Adsorption journal September 2019
Hierarchical Micro‐ and Mesoporous Zn‐Based Metal–Organic Frameworks Templated by Hydrogels: Their Use for Enzyme Immobilization and Catalysis of Knoevenagel Reaction journal October 2019
Hierarchy in Metal–Organic Frameworks journal March 2020
Stable Metal–Organic Frameworks with Group 4 Metals: Current Status and Trends journal February 2018
Engineering a Highly Defective Stable UiO-66 with Tunable Lewis- Brønsted Acidity: The Role of the Hemilabile Linker journal January 2020