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Ji LJ, Yang TY, Feng GQ, Li S, Li W, Bu XH. Liquid-Phase Exfoliation of 3D Metal-Organic Frameworks into Nanosheets. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2404756. [PMID: 39119851 DOI: 10.1002/adma.202404756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 08/05/2024] [Indexed: 08/10/2024]
Abstract
Traditionally, the acquisition of 2D materials involved the exfoliation of layered crystals. However, the anisotropic bonding arrangements within 3D crystals indicate they are mechanically reminiscent of 2D counterparts and could also be exfoliated into nanosheets. This report delineates the preparation of 2D nanosheets from six representative 3D metal-organic frameworks (MOFs) through liquid-phase exfoliation. Notably, the cleavage planes of exfoliated nanosheets align perpendicular to the direction of the minimum elastic modulus (Emin) within the pristine 3D frameworks. The findings suggest that the in-plane and out-of-plane bonding forces of the exfoliated nanosheets can be correlated with the maximum elastic modulus (Emax) and Emin of the 3D frameworks, respectively. Emax influences the ease of cleaving adjacent layers, while Emin governs the ability to resist cracking of layers. Hence, a combination of large Emax and small Emin indicates an efficient exfoliation process, and vice versa. The ratio of Emax/Emin, denoted as Amax/min, is adopted as a universal index to quantify the ease of mechanical exfoliation for 3D MOFs. This ratio, readily accessible through mechanical experiments and computation, serves as a valuable metric for selecting appropriate exfoliation methods to produce surfactant-free 2D nanosheets from various 3D materials.
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Affiliation(s)
- Li-Jun Ji
- Department of Physics and Mechanical and Electrical Engineering & Expert Workstation for Terahertz Technology and Advanced Energy Materials and Devices, Hubei University of Education, Wuhan, 430074, China
| | - Tian-Yi Yang
- School of Materials Science and Engineering, Smart Sensing Interdisciplinary Science Center, Nankai University & TKL of Metal and Molecule Based Material Chemistry, Tianjin, 300350, China
| | - Guo-Qiang Feng
- Department of Physics and Mechanical and Electrical Engineering & Expert Workstation for Terahertz Technology and Advanced Energy Materials and Devices, Hubei University of Education, Wuhan, 430074, China
| | - Sha Li
- Department of Physics and Mechanical and Electrical Engineering & Expert Workstation for Terahertz Technology and Advanced Energy Materials and Devices, Hubei University of Education, Wuhan, 430074, China
| | - Wei Li
- School of Materials Science and Engineering, Smart Sensing Interdisciplinary Science Center, Nankai University & TKL of Metal and Molecule Based Material Chemistry, Tianjin, 300350, China
| | - Xian-He Bu
- School of Materials Science and Engineering, Smart Sensing Interdisciplinary Science Center, Nankai University & TKL of Metal and Molecule Based Material Chemistry, Tianjin, 300350, China
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2
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Nicks J, Foster JA. Post-exfoliation functionalisation of metal-organic framework nanosheets via click chemistry. NANOSCALE 2022; 14:6220-6227. [PMID: 35403656 DOI: 10.1039/d2nr00346e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The liquid exfoliation of layered metal-organic frameworks (MOFs) to form nanosheets (MONs) exposes buried functional groups making them useful in a range of sensing and catalytic applications. Here we show how high yielding click reactions can be used post-exfoliation to systematically modify the surface chemistry of MONs allowing for tuning of their surface properties and their use in new applications. A layered amino-functionalised framework is converted through conventional post-synthetic functionalisation of the bulk MOF to form azide functionalised frameworks of up to >99% yield. Ultrasonic liquid exfoliation is then used to form few-layer nanosheets, which are further functionalised through post exfoliation functionalisation using Cu(I)-catalysed azide-alkyne cycloaddition reactions. Here we demonstrate the advantages of post-exfoliation functionalisation in enabling: (1) a range of functional groups to be incorporated in high yields; (2) tuning of nanosheet surface properties without the need for extensive recharacterisation; (3) the addition of fluorescent functional groups to enable their use in the sensing of hazardous nitrobenzene. We anticipate that the versatility of different functional groups that can be introduced through high yielding click reactions will lead to advances in the use of MONs and other 2D materials for a variety of applications.
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Affiliation(s)
- Joshua Nicks
- Department of Chemistry, University of Sheffield, Sheffield, UK.
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3
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Li Y, Wang T, Liu D. Fabrication of Ultrathin Membranes Using 2D-MOF Nanosheets for Tunable Gas Separation. Chem Asian J 2021; 16:3413-3418. [PMID: 34463030 DOI: 10.1002/asia.202100875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/25/2021] [Indexed: 11/06/2022]
Abstract
Two-dimensional (2D) metal-organic frameworks (MOF) nanosheets have emerged as novel membrane materials for gas separation. However, the development of ultrathin MOF membranes with tunable separation performances is still a challenge. Herein, we developed a facile GO-assisted restacking method to fabricate defect-free membranes with monolayer Zr-BTB nanosheets. Obtained ultrathin membranes ranging from 130 nm to 320 nm show tunable separation performances and exceed the 2008 Robeson upper bound by changing the amount of nanolayers in vertical stacking direction. Furthermore, a heating filtration method was used to change the restacking process of nanosheets in the horizontal direction. As a result, H2 /CO2 selectivity can be enhanced by two times with the same membrane thickness (130 nm) and H2 permeance is almost maintained to be 7.0×10-7 mol m-2 s-1 pa-1 . This method may provide a possible way to efficiently tune the gas separation performances of MOF membranes.
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Affiliation(s)
- Yuxiao Li
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chmical Technology, Beijing, 100029, P. R China
| | - Ting Wang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chmical Technology, Beijing, 100029, P. R China
| | - Dahuan Liu
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chmical Technology, Beijing, 100029, P. R China
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Wang Z, Zhu J, Xu S, Zhang Y, Van der Bruggen B. Graphene-like MOF nanosheets stabilize graphene oxide membranes enabling selective molecular sieving. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119397] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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5
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Nicks J, Boer SA, White NG, Foster JA. Monolayer nanosheets formed by liquid exfoliation of charge-assisted hydrogen-bonded frameworks. Chem Sci 2021; 12:3322-3327. [PMID: 34164102 PMCID: PMC8179369 DOI: 10.1039/d0sc06906j] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 01/12/2021] [Indexed: 11/21/2022] Open
Abstract
Hydrogen-bonded organic frameworks (HOFs) are a diverse and tunable class of materials, but their potential as free-standing two-dimensional nanomaterials has yet to be explored. Here we report the self-assembly of two layered hydrogen-bonded frameworks based on strong, charge-assisted hydrogen-bonding between carboxylate and amidinium groups. Ultrasound-assisted liquid exfoliation of both materials readily produces monolayer hydrogen-bonded organic nanosheets (HONs) with micron-sized lateral dimensions. The HONs show remarkable stability and maintain their extended crystallinity and monolayer structures even after being suspended in water at 80 °C for three days. These systems also exhibit efficient fluorescence quenching of an organic dye in organic solvents, superior to the quenching ability of the bulk frameworks. We anticipate that this approach will provide a route towards a diverse new family of molecular two-dimensional materials.
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Affiliation(s)
- Joshua Nicks
- Department of Chemistry, University of Sheffield Sheffield UK
| | - Stephanie A Boer
- Research School of Chemistry, The Australian National University Canberra ACT 2600 Australia
| | - Nicholas G White
- Research School of Chemistry, The Australian National University Canberra ACT 2600 Australia
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6
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Schneemann A, Dong R, Schwotzer F, Zhong H, Senkovska I, Feng X, Kaskel S. 2D framework materials for energy applications. Chem Sci 2020; 12:1600-1619. [PMID: 34163921 PMCID: PMC8179301 DOI: 10.1039/d0sc05889k] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 12/09/2020] [Indexed: 12/31/2022] Open
Abstract
In recent years a massive increase in publications on conventional 2D materials (graphene, h-BN, MoS2) is documented, accompanied by the transfer of the 2D concept to porous (crystalline) materials, such as ordered 2D layered polymers, covalent-organic frameworks, and metal-organic frameworks. Over the years, the 3D frameworks have gained a lot of attention for use in applications, ranging from electronic devices to catalysis, and from information to separation technologies, mostly due to the modular construction concept and exceptionally high porosity. A key challenge lies in the implementation of these materials into devices arising from the deliberate manipulation of properties upon delamination of their layered counterparts, including an increase in surface area, higher diffusivity, better access to surface sites and a change in the band structure. Within this minireview, we would like to highlight recent achievements in the synthesis of 2D framework materials and their advantages for certain applications, and give some future perspectives.
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Affiliation(s)
- Andreas Schneemann
- Department of Inorganic Chemistry, Technische Universität Dresden Bergstr. 66 01069 Dresden Germany
| | - Renhao Dong
- Center for Advancing Electronics Dresden (CFAED), Faculty of Chemistry and Food Chemistry, Technische Universität Dresden 01062 Dresden Germany
| | - Friedrich Schwotzer
- Department of Inorganic Chemistry, Technische Universität Dresden Bergstr. 66 01069 Dresden Germany
| | - Haixia Zhong
- Center for Advancing Electronics Dresden (CFAED), Faculty of Chemistry and Food Chemistry, Technische Universität Dresden 01062 Dresden Germany
| | - Irena Senkovska
- Department of Inorganic Chemistry, Technische Universität Dresden Bergstr. 66 01069 Dresden Germany
| | - Xinliang Feng
- Center for Advancing Electronics Dresden (CFAED), Faculty of Chemistry and Food Chemistry, Technische Universität Dresden 01062 Dresden Germany
| | - Stefan Kaskel
- Department of Inorganic Chemistry, Technische Universität Dresden Bergstr. 66 01069 Dresden Germany
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7
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Wang F, Liu Z, Cheng Z. Ultrasonic‐assisted exfoliation for 2D Zn(Bim)(OAc) nanosheets used as an oil‐soluble additive in lubricants. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5950] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Fei‐Fei Wang
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 China
| | - Zan Liu
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 China
| | - Zhi‐Lin Cheng
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 China
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8
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Le TH, Oh Y, Kim H, Yoon H. Exfoliation of 2D Materials for Energy and Environmental Applications. Chemistry 2020; 26:6360-6401. [PMID: 32162404 DOI: 10.1002/chem.202000223] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Indexed: 12/20/2022]
Abstract
The fascinating properties of single-layer graphene isolated by mechanical exfoliation have inspired extensive research efforts toward two-dimensional (2D) materials. Layered compounds serve as precursors for atomically thin 2D materials (briefly, 2D nanomaterials) owing to their strong intraplane chemical bonding but weak interplane van der Waals interactions. There are newly emerging 2D materials beyond graphene, and it is becoming increasingly important to develop cost-effective, scalable methods for producing 2D nanomaterials with controlled microstructures and properties. The variety of developed synthetic techniques can be categorized into two classes: bottom-up and top-down approaches. Of top-down approaches, the exfoliation of bulk 2D materials into single or few layers is the most common. This review highlights chemical and physical exfoliation methods that allow for the production of 2D nanomaterials in large quantities. In addition, remarkable examples of utilizing exfoliated 2D nanomaterials in energy and environmental applications are introduced.
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Affiliation(s)
- Thanh-Hai Le
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
| | - Yuree Oh
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
| | - Hyungwoo Kim
- Alan G. MacDiarmid Energy Research &, School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea.,Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
| | - Hyeonseok Yoon
- Alan G. MacDiarmid Energy Research &, School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea.,Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
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9
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Ashworth DJ, Foster JA. Blending functionalised ligands to form multivariate metal-organic framework nanosheets (MTV-MONs) with tuneable surface chemistry. NANOSCALE 2020; 12:7986-7994. [PMID: 32232304 DOI: 10.1039/d0nr01009j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report a new approach to tuning the properties of metal-organic framework nanosheets (MONs) by blending functionalised ligands to produce multivariate MONs (MTV-MONs). This approach enabled not only fine tuning of the MONs properties, but also resulted in MTV-MONs that show enhanced performance compared to their single-ligand counterparts. Layered copper paddle-wheel based MOFs were synthesised incorporating two or more 2,5-difunctionalised-benzene-1,4-dicarboxylate (fu-BDC) ligands. Liquid ultrasonic exfoliation resulted in the formation of nanosheets down to monolayer thickness presenting multiple functional moieties. Blending of ligands with relatively hydrophilic (methoxy-propoxy) and hydrophobic (pentoxy) moieties resulted in MTV-MONs that showed enhanced dispersion in both polar and apolar solvents compared to either single-ligand parent MON as well as intermediary binding properties. Blending of different fu-BDC ligands with different length alkoxy chains (methoxy-pentoxy) allowed incorporation of up to five different ligands within a single MTV-MON, including ligands which do not form this structure individually. This study demonstrates the potential of blending multiple ligands within an MTV-MON to enable fine-tuning of their structure and properties but also create new nanosheets which are more than the sum of their parts.
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Affiliation(s)
- David J Ashworth
- Department of Chemistry, The University of Sheffield, Sheffield, UKS3 7HF.
| | - Jonathan A Foster
- Department of Chemistry, The University of Sheffield, Sheffield, UKS3 7HF.
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10
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León-Alcaide L, López-Cabrelles J, Mínguez Espallargas G, Coronado E. 2D magnetic MOFs with micron-lateral size by liquid exfoliation. Chem Commun (Camb) 2020; 56:7657-7660. [DOI: 10.1039/d0cc02982c] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we obtained high-quality nanosheets for a whole family of Fe-based magnetic MOFs, MUV-1-X, through a liquid exfoliation procedure.
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Affiliation(s)
- Luis León-Alcaide
- Instituto de Ciencia Molecular (ICMol)
- Universidad de Valencia
- 46980 Paterna
- Spain
| | | | | | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol)
- Universidad de Valencia
- 46980 Paterna
- Spain
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11
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Qin JH, Zhang H, Sun P, Huang YD, Shen Q, Yang XG, Ma LF. Ionic liquid induced highly dense assembly of porphyrin in MOF nanosheets for photodynamic therapy. Dalton Trans 2020; 49:17772-17778. [DOI: 10.1039/d0dt03031g] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A facile fabrication of porphyrin-integrated MOF nanosheets as efficient photosensitizers for photodynamic therapy (PDT) is presented.
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Affiliation(s)
- Jian-Hua Qin
- College of Chemistry and Chemical Engineering
- Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471934
- China
| | - Hua Zhang
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors
- Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
| | - Pengfei Sun
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors
- Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
| | - Ya-Dan Huang
- College of Chemistry and Chemical Engineering
- Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471934
- China
| | - Qingming Shen
- Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors
- Institute of Advanced Materials (IAM)
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
| | - Xiao-Gang Yang
- College of Chemistry and Chemical Engineering
- Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471934
- China
| | - Lu-Fang Ma
- College of Chemistry and Chemical Engineering
- Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471934
- China
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12
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Ashworth DJ, Roseveare TM, Schneemann A, Flint M, Dominguez Bernáldes I, Vervoorts P, Fischer RA, Brammer L, Foster JA. Increasing Alkyl Chain Length in a Series of Layered Metal-Organic Frameworks Aids Ultrasonic Exfoliation to Form Nanosheets. Inorg Chem 2019; 58:10837-10845. [PMID: 31386356 PMCID: PMC7007210 DOI: 10.1021/acs.inorgchem.9b01128] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
![]()
Metal–organic
framework nanosheets (MONs) are attracting
increasing attention as a diverse class of two-dimensional materials
derived from metal–organic frameworks (MOFs). The principles
behind the design of layered MOFs that can readily be exfoliated to
form nanosheets, however, remain poorly understood. Here we systematically
investigate an isoreticular series of layered MOFs functionalized
with alkoxy substituents in order to understand the effect of substituent
alkyl chain length on the structure and properties of the resulting
nanosheets. A series of 2,5-alkoxybenzene-1,4-dicarboxylate ligands
(O2CC6H2(OR)2CO2, R = methyl–pentyl, 1–5,
respectively) was used to synthesize copper paddle-wheel MOFs. Rietveld
and Pawley fitting of powder diffraction patterns for compounds Cu(3–5)(DMF) showed they adopt an isoreticular
series with two-dimensional connectivity in which the interlayer distance
increases from 8.68 Å (R = propyl) to 10.03 Å (R = pentyl).
Adsorption of CO2 by the MOFs was found to increase from
27.2 to 40.2 cm3 g–1 with increasing
chain length, which we attribute to the increasing accessible volume
associated with increasing unit-cell volume. Ultrasound was used to
exfoliate the layered MOFs to form MONs, with shorter alkyl chains
resulting in higher concentrations of exfoliated material in suspension.
The average height of MONs was investigated by AFM and found to decrease
from 35 ± 26 to 20 ± 12 nm with increasing chain length,
with the thinnest MONs observed being only 5 nm, corresponding to
five framework layers. These results indicate that careful choice
of ligand functionalities can be used to tune nanosheet structure
and properties, enabling optimization for a variety of applications. A series of layered copper metal−organic frameworks
(MOFs) were synthesized, utilizing benzene-1,4-dicarboxylates difunctionalized
in the 2,5-positions with alkoxy pendent chains (methoxy-pentoxy)
as the organic ligands. Increasing the chain length from propoxy to
pentoxy increased the interlayer distance, resulted in increased CO2 uptake, and aided the ultrasonic exfoliation of these MOFs
to form nanosheets, producing MONs down to just 5 nm thick.
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Affiliation(s)
- David J Ashworth
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield S3 7HF , U.K
| | - Thomas M Roseveare
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield S3 7HF , U.K
| | - Andreas Schneemann
- Department of Chemistry , Technische Universität München , Lichtenbergstraße 4 , 85748 Garching , Germany.,Catalysis Research Centre , Technische Universität München , Ernst-Otto-Fischer Straße 1 , 85748 Garching , Germany
| | - Max Flint
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield S3 7HF , U.K
| | | | - Pia Vervoorts
- Department of Chemistry , Technische Universität München , Lichtenbergstraße 4 , 85748 Garching , Germany.,Catalysis Research Centre , Technische Universität München , Ernst-Otto-Fischer Straße 1 , 85748 Garching , Germany
| | - Roland A Fischer
- Department of Chemistry , Technische Universität München , Lichtenbergstraße 4 , 85748 Garching , Germany.,Catalysis Research Centre , Technische Universität München , Ernst-Otto-Fischer Straße 1 , 85748 Garching , Germany
| | - Lee Brammer
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield S3 7HF , U.K
| | - Jonathan A Foster
- Department of Chemistry , University of Sheffield , Brook Hill , Sheffield S3 7HF , U.K
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Deng JH, Wen YQ, Willman J, Liu WJ, Gong YN, Zhong DC, Lu TB, Zhou HC. Facile Exfoliation of 3D Pillared Metal–Organic Frameworks (MOFs) to Produce MOF Nanosheets with Functionalized Surfaces. Inorg Chem 2019; 58:11020-11027. [DOI: 10.1021/acs.inorgchem.9b01564] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ji-Hua Deng
- College of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
- Institute for New Energy Materials and Low Carbon Technologies, Joint Laboratory of MOE International Cooperation in Materials Microstructure, School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Ya-Qiong Wen
- College of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
| | - Jeremy Willman
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
| | - Wen-Ju Liu
- Institute for New Energy Materials and Low Carbon Technologies, Joint Laboratory of MOE International Cooperation in Materials Microstructure, School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Yun-Nan Gong
- College of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
| | - Di-Chang Zhong
- College of Chemistry & Chemical Engineering, Gannan Normal University, Ganzhou 341000, China
- Institute for New Energy Materials and Low Carbon Technologies, Joint Laboratory of MOE International Cooperation in Materials Microstructure, School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Tong-Bu Lu
- Institute for New Energy Materials and Low Carbon Technologies, Joint Laboratory of MOE International Cooperation in Materials Microstructure, School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Hong-Cai Zhou
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
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Hu A, Pang Q, Tang C, Bao J, Liu H, Ba K, Xie S, Chen J, Chen J, Yue Y, Tang Y, Li Q, Sun Z. Epitaxial Growth and Integration of Insulating Metal–Organic Frameworks in Electrochemistry. J Am Chem Soc 2019; 141:11322-11327. [DOI: 10.1021/jacs.9b05869] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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15
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Ashworth DJ, Cooper A, Trueman M, Al‐Saedi RWM, Smith LD, Meijer AJHM, Foster JA. Ultrasonic Exfoliation of Hydrophobic and Hydrophilic Metal-Organic Frameworks To Form Nanosheets. Chemistry 2018; 24:17986-17996. [PMID: 30222223 PMCID: PMC6348380 DOI: 10.1002/chem.201803221] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Indexed: 01/29/2023]
Abstract
The modular structure of metal-organic framework nanosheets (MONs) provides a convenient route to creating two-dimensional materials with readily tuneable surface properties. Here, the liquid exfoliation of two closely related layered metal-organic frameworks functionalised with either methoxy-propyl (1) or pentyl (2) pendent groups intended to bestow either hydrophilic or hydrophobic character to the resulting nanosheets is reported. Exfoliation of the two materials in a range of different solvents highlighted significant differences in their dispersion properties, as well as their molecular and nanoscopic structures. Exchange or loss of solvent was found to occur at the labile axial position of the paddle-wheel based MONs and DFT calculations indicated that intramolecular coordination by the oxygen of the methoxy-propyl pendant groups may take place. The nanoscopic dimensions of the MONs were further tuned by varying the exfoliation conditions and through "liquid cascade centrifugation". Aqueous suspensions of the nanosheets were used as sensors to detect aromatic heterocycles with clear differences in binding behaviour observed and quantified.
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Affiliation(s)
| | - Adam Cooper
- Department of ChemistryUniversity of SheffieldSheffieldS3 7HFUK
| | - Mollie Trueman
- Department of ChemistryUniversity of SheffieldSheffieldS3 7HFUK
| | | | - Liam D. Smith
- Department of ChemistryUniversity of SheffieldSheffieldS3 7HFUK
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