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Pham HTB, Choi JY, Stodolka M, Park J. Maximizing the Potential of Electrically Conductive MOFs. Acc Chem Res 2024. [PMID: 38294773 DOI: 10.1021/acs.accounts.3c00718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
ConspectusElectrically conductive metal-organic frameworks (EC-MOFs) have emerged as a compelling class of materials, drawing increasing attention due to their unique properties facilitating charge transport within porous structures. The synergy between electrical conductivity and porosity has opened a wide range of applications, including electrocatalysis, energy storage, chemiresistive sensing, and electronic devices that have been underexplored for their insulating counterparts. Despite these promising prospects, a prevalent challenge arises from the predominant adoption of two-dimensional (2D) structures by most EC-MOFs. These 2D frameworks often show modest surface areas and short interlayer distances, hindering molecular accessibility, which deviates from the inherent characteristics of conventional MOFs. Furthermore, the quest for efficient charge transport imposes design constraints, leading to a restricted selection of functional building blocks. Additionally, there is a lack of established functionalization methods within EC-MOFs, limiting their functional diversity. Thus, these challenges have impeded EC-MOFs from reaching their full potential.In this Account, we summarize and discuss our group's efforts aimed at enhancing molecular accessibility and deploying the functional diversity of EC-MOFs. Our focus on enhancing molecular accessibility involves several strategies. First, we employed macrocyclic ligands with intrinsic pockets as the building blocks for EC-MOFs. The integrated intrinsic pockets in the frameworks supplement surface areas and additional pores to enhance molecular accessibility. The resulting macrocyclic ligand-based EC-MOFs exhibit exceptionally high surface areas and confer advantages in electrochemical performances. Second, our efforts extend to addressing the structural limitations, frequently associated with EC-MOFs' 2D structures. Through the pillar insertion strategy, we transformed a 2D EC-MOF platform into a three-dimensional (3D) structure, thereby achieving higher porosity and enhanced molecular accessibility. In pursuing functional diversity, we have delved into molecular-level tuning of EC-MOF building blocks. We demonstrated that electron-rich alkyne-based pockets in the macrocyclic ligands can host transition metals and alkali ions, enabling ion selectivity and showcasing diverse use of EC-MOFs. We utilized a postsynthetic approach to further functionalize metal nodes on the molecular level within an EC-MOF framework, introducing a proton-conducting pathway while preserving its electrical conductivity.We aspire for this Account to provide practical insights and strategies to surmount structural and functional diversity limitations in the realm of EC-MOFs. By integrating enhanced molecular accessibility and diverse functionality, our endeavor to propel the utility of these materials will inspire further rational development for future EC-MOFs and unlock their full potential.
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Affiliation(s)
- Hoai T B Pham
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Ji Yong Choi
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Michael Stodolka
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Jihye Park
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
- Materials Science & Engineering Program, University of Colorado Boulder, Boulder, Colorado 80303, United States
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Keasler KT, Zick ME, Stacy EE, Kim J, Lee JH, Aeindartehran L, Runčevski T, Milner PJ. Handling fluorinated gases as solid reagents using metal-organic frameworks. Science 2023; 381:1455-1461. [PMID: 37769097 PMCID: PMC10799685 DOI: 10.1126/science.adg8835] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 08/24/2023] [Indexed: 09/30/2023]
Abstract
Fluorine is an increasingly common substituent in pharmaceuticals and agrochemicals because it improves the bioavailability and metabolic stability of organic molecules. Fluorinated gases represent intuitive building blocks for the late-stage installation of fluorinated groups, but they are generally overlooked because they require the use of specialized equipment. We report a general strategy for handling fluorinated gases as benchtop-stable solid reagents using metal-organic frameworks (MOFs). Gas-MOF reagents are prepared on gram-scale and used to facilitate fluorovinylation and fluoroalkylation reactions. Encapsulation of gas-MOF reagents within wax enables stable storage on the benchtop and controlled release into solution upon sonication, which represents a safer alternative to handling the gas directly. Furthermore, our approach enables high-throughput reaction development with these gases.
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Affiliation(s)
- Kaitlyn T. Keasler
- Department of Chemistry and Chemical Biology, Cornell University; Ithaca, New York 14850, United States
| | - Mary E. Zick
- Department of Chemistry and Chemical Biology, Cornell University; Ithaca, New York 14850, United States
| | - Emily E. Stacy
- Department of Chemistry and Chemical Biology, Cornell University; Ithaca, New York 14850, United States
| | - Jaehwan Kim
- Department of Chemistry and Chemical Biology, Cornell University; Ithaca, New York 14850, United States
| | - Jung-Hoon Lee
- Computational Science Research Center, Korea Institute of Science and Technology (KIST); Seoul 02792, Republic of Korea
| | - Lida Aeindartehran
- Department of Chemistry, Southern Methodist University; Dallas, Texas 75275, United States
| | - Tomče Runčevski
- Department of Chemistry, Southern Methodist University; Dallas, Texas 75275, United States
| | - Phillip J. Milner
- Department of Chemistry and Chemical Biology, Cornell University; Ithaca, New York 14850, United States
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A carbon monoxide releasing metal organic framework nanoplatform for synergistic treatment of triple-negative breast tumors. J Nanobiotechnology 2022; 20:494. [PMID: 36424645 PMCID: PMC9685850 DOI: 10.1186/s12951-022-01704-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/11/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Carbon monoxide (CO) is an important signaling molecule participating in multiple biological functions. Previous studies have confirmed the valuable roles of CO in cancer therapies. If the CO concentration and distribution can be controlled in tumors, new cancer therapeutic strategy may be developed to benefit the patient survival. RESULTS In this study, a UiO-67 type metal-organic framework (MOF) nanoplatform was produced with cobalt and ruthenium ions incorporated into its structure (Co/Ru-UiO-67). Co/Ru-UiO-67 had a size range of 70-90 nm and maintained the porous structure, with cobalt and ruthenium distributed uniformly inside. Co/Ru-UiO-67 was able to catalyze carbon dioxide into CO upon light irradiation in an efficient manner with a catalysis speed of 5.6 nmol/min per 1 mg Co/Ru-UiO-67. Due to abnormal metabolic properties of tumor cells, tumor microenvironment usually contains abundant amount of CO2. Co/Ru-UiO-67 can transform tumor CO2 into CO at both cellular level and living tissues, which consequently interacts with relevant signaling pathways (e.g. Notch-1, MMPs etc.) to adjust tumor microenvironment. With proper PEGylation (pyrene-polyacrylic acid-polyethylene glycol, Py-PAA-PEG) and attachment of a tumor-homing peptide (F3), functionalized Co/Ru-UiO-67 could accumulate strongly in triple-negative MDA-MB-231 breast tumors, witnessed by positron emission tomography (PET) imaging after the addition of radioactive zirconium-89 (89Zr) into Co-UiO-67. When applied in vivo, Co/Ru-UiO-67 could alter the local hypoxic condition of MDA-MB-231 tumors, and work synergistically with tirapazamine (TPZ). CONCLUSION This nanoscale UiO-67 MOF platform can further our understanding of CO functions while produce CO in a controllable manner during cancer therapeutic administration.
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Röß-Ohlenroth R, Kraft M, Bunzen H, Volkmer D. Inhibition, Binding of Organometallics, and Thermally Induced CO Release in an MFU-4-Type Metal-Organic Framework Scaffold with Open Bidentate Bibenzimidazole Coordination Sites. Inorg Chem 2022; 61:16380-16389. [PMID: 36197843 DOI: 10.1021/acs.inorgchem.2c02394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Triazolate-based MFU-4-type metal-organic frameworks are promising candidates for various applications, of which heterogeneous catalysis has emerged as a hot topic owing to the facile post-synthetic metal and ligand exchange in Kuratowski secondary building units (SBUs). Herein, we present the largest non-interpenetrated isoreticular MFU-4-type framework CFA-19 ([Co5IICl4(H2-bibt)3]; H4-bibt = 1,1',5,5'-tetrahydro-6,6'-biimidazo[4,5-f]benzotriazole; CFA-19 = Coordination Framework Augsburg University-19) and the CFA-19-Tp derivative featuring trispyrazolylborate inhibited SBUs as a scaffold with open bibenzimidazole coordination sites at the backbone of the H4-bibt linker. The proof-of-principle incorporation of accessible MIBr(CO)3 (M = Re, Mn) sites in CFA-19-Tp was revealed by single-crystal X-ray diffraction, and a thermally induced CO release was observed for MnBr(CO)3. Deprotonation of bibenzimidazole was also achieved by the reaction with ZnEt2.
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Affiliation(s)
- Richard Röß-Ohlenroth
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstr. 1, D-86159 Augsburg, Germany
| | - Maryana Kraft
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstr. 1, D-86159 Augsburg, Germany
| | - Hana Bunzen
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstr. 1, D-86159 Augsburg, Germany
| | - Dirk Volkmer
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitätsstr. 1, D-86159 Augsburg, Germany
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Liang L, Zhong Y, Chen J, Zhang J, Zhang T, Li Z. Energetic Bimetallic MOF: A Promising Promoter for Ionic Liquid Hypergolic Ignition. Inorg Chem 2022; 61:14864-14870. [PMID: 36074725 DOI: 10.1021/acs.inorgchem.2c02479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A bimetallic MOF, CoNi(EIM)2(DCA)2 (1), containing an energetic 1-ethylimidazole (EIM) ligand and a hypergolic linker, dicyandiamide (DCA), was synthesized via a facile method. A fascinating three-dimensional reticular architecture was observed by single-crystal X-ray diffraction in this bimetallic MOF, whereas the corresponding monometallic compounds Co(EIM)4(DCA)2 (2) and Ni(EIM)4(DCA)2 (3) were in the mononuclear coordination mode. Uniformly distributed Co and Ni were observed in the bimetallic MOF crystals by SEM-EDS elemental mapping. Bimetallic MOF 1 was thermally stable and insensitive to mechanical stimuli and possessed an excellent energetic density (22.37 kJ·g-1). Using 1 as a hypergolic promoter, the ignition delay time of 1-butyl-3-methylimidazolium dicyanamide (BMIM DCA) was reduced from 53 to 37 ms, better than that of 2 and 3 as promoters, due to the synergistic catalysis of the bimetal. Furthermore, the thermal decomposition mechanisms of BMIM DCA with 1, 2, and 3 were studied by differential scanning calorimetry (DSC). 1 had the best catalytic performance in BMIM DCA thermolysis with a decrease in the decomposition temperature from 314.5 to 308.0 °C and a decrease in the activation energy by 16.3%. All results shed light on the better catalytic effect of the bimetallic MOF on ionic liquid hypergolic ignition than monometallic coordination compounds.
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Affiliation(s)
- Linna Liang
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Ye Zhong
- China North Advanced Technology Generalization Institute, Beijing 100081, People's Republic of China
| | - Jiamin Chen
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Jianguo Zhang
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Tonglai Zhang
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
| | - Zhimin Li
- State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People's Republic of China
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Liu J, Goetjen TA, Wang Q, Knapp JG, Wasson MC, Yang Y, Syed ZH, Delferro M, Notestein JM, Farha OK, Hupp JT. MOF-enabled confinement and related effects for chemical catalyst presentation and utilization. Chem Soc Rev 2022; 51:1045-1097. [PMID: 35005751 DOI: 10.1039/d1cs00968k] [Citation(s) in RCA: 85] [Impact Index Per Article: 42.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A defining characteristic of nearly all catalytically functional MOFs is uniform, molecular-scale porosity. MOF pores, linkers and nodes that define them, help regulate reactant and product transport, catalyst siting, catalyst accessibility, catalyst stability, catalyst activity, co-catalyst proximity, composition of the chemical environment at and beyond the catalytic active site, chemical intermediate and transition-state conformations, thermodynamic affinity of molecular guests for MOF interior sites, framework charge and density of charge-compensating ions, pore hydrophobicity/hydrophilicity, pore and channel rigidity vs. flexibility, and other features and properties. Collectively and individually, these properties help define overall catalyst functional behaviour. This review focuses on how porous, catalyst-containing MOFs capitalize on molecular-scale confinement, containment, isolation, environment modulation, energy delivery, and mobility to accomplish desired chemical transformations with potentially superior selectivity or other efficacy, especially in comparison to catalysts in homogeneous solution environments.
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Affiliation(s)
- Jian Liu
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA.
| | - Timothy A Goetjen
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA. .,Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Qining Wang
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA.
| | - Julia G Knapp
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA.
| | - Megan C Wasson
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA.
| | - Ying Yang
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA.
| | - Zoha H Syed
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA. .,Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Massimiliano Delferro
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Justin M Notestein
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
| | - Omar K Farha
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA. .,Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
| | - Joseph T Hupp
- Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208, USA.
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