1
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Wang Z, Du H, Evans AM, Ni X, Bredas JL, Li H. Growth of two-dimensional covalent organic frameworks on substrates: insight from microsecond atomistic simulations. Chem Sci 2024:d4sc05168h. [PMID: 39386909 PMCID: PMC11459634 DOI: 10.1039/d4sc05168h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2024] [Accepted: 10/02/2024] [Indexed: 10/12/2024] Open
Abstract
While growing two-dimensional covalent organic frameworks (2D COFs) on substrates holds promise for producing functional monolayers, the presence of many defects in the resulting crystals often hinders their practical applications. Achieving structural order while suppressing defect formation necessitates a detailed atomic-level understanding. The key lies in understanding the polymerization process with high nano-scale accuracy, which presents significant challenges. Here, we perform microsecond atomistic molecular dynamics simulations to describe the deposition and polymerization of cyclohexa-m-phenylene on metal substrates, closely mimicking experimental conditions. Our improved approach highlights that 2D polymerization occurs through monomer addition and island coalescence, with a pre-bonding stage allowing monomers/oligomers to dynamically adjust their configurations to the expanding island structures. Our results elucidate the mechanisms underlying the formation of vacancy and dislocation defects during 2D polymerization as well as their healing processes. Overall, our findings underscore the significant roles that high surface mobility, effective monomer-substrate anchoring, high framework rigidity, moderate monomer coordination, and low bonding rate play in forming large, extended 2D crystals while suppressing vacancy and dislocation defects. We demonstrate how these factors can be tuned through substrate selection, deposition rate modulation, and temperature control, thereby offering valuable insight for strategically optimizing on-surface 2D polymerizations.
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Affiliation(s)
- Zilin Wang
- School of Microelectronics, Shanghai University Shanghai 201800 China
- Department of Chemistry, College of Sciences, Shanghai University Shanghai 200444 China
| | - Hong Du
- School of Microelectronics, Shanghai University Shanghai 201800 China
- Department of Chemistry, College of Sciences, Shanghai University Shanghai 200444 China
| | - Austin M Evans
- George and Josephine Butler Polymer Laboratory, Department of Chemistry, University of Florida Gainesville Florida 32611-7200 USA
| | - Xiaojuan Ni
- Department of Chemistry and Biochemistry, The University of Arizona Tucson Arizona 85721-0041 USA
| | - Jean-Luc Bredas
- Department of Chemistry and Biochemistry, The University of Arizona Tucson Arizona 85721-0041 USA
| | - Haoyuan Li
- School of Microelectronics, Shanghai University Shanghai 201800 China
- Department of Chemistry, College of Sciences, Shanghai University Shanghai 200444 China
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2
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Daliran S, Oveisi AR, Dhakshinamoorthy A, Garcia H. Probing Defects in Covalent Organic Frameworks. ACS APPLIED MATERIALS & INTERFACES 2024; 16:50096-50114. [PMID: 39283167 DOI: 10.1021/acsami.4c12069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/28/2024]
Abstract
Defects in covalent organic frameworks (COFs) play a pivotal role in determining their properties and performance, significantly influencing interactions with adsorbates, guest molecules, and substrates as well as affecting charge carrier dynamics and light absorption characteristics. The present review focuses on the diverse array of techniques employed for characterizing and quantifying defects in COFs, addressing a critical need in the field of materials science. As will be discussed in this review, there are basically two types of defects referring either to missing organic moieties leaving free binding groups in the material or structural imperfections resulting in lower crystallinity, grain boundary defects, and incomplete stacking. The review summarizes an in-depth analysis of state-of-the-art characterization techniques, elucidating their specific strengths and limitations for each defect type. Key techniques examined in this review include powder X-ray diffraction (PXRD), infrared spectroscopy (IR), thermogravimetric analysis (TGA), nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), scanning transmission electron microscopy (STEM), scanning tunneling microscope (STM), high resolution transmission electron microcoe (HRTEM), gas adsorption, acid-base titration, advanced electron microscopy methods, and computational calculations. We critically assess the capability of each technique to provide qualitative and quantitative information about COF defects, offering insights into their complementary nature and potential for synergistic use. The last section summarizes the main concepts of the review and provides perspectives for future development to overcome the existing challenges.
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Affiliation(s)
- Saba Daliran
- Department of Organic Chemistry, Faculty of Chemistry, Lorestan University, Khorramabad 68151-44316, Iran
| | - Ali Reza Oveisi
- Department of Chemistry, University of Zabol, P.O. Box: 98615-538, Zabol, 98613-35856, Iran
| | - Amarajothi Dhakshinamoorthy
- Departamento de Química, Universitat Politècnica de València, C/Camino de Vera, s/n, 46022, Valencia, Spain
- School of Chemistry, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India
| | - Hermenegildo Garcia
- Instituto de Universitario de Tecnología Química (CSIC-UPV), Universitat Politècnica de València, Av. de los Naranjos, 46022, Valencia, Spain
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3
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Tian J, Treaster KA, Xiong L, Wang Z, Evans AM, Li H. Taming Two-Dimensional Polymerization by a Machine-Learning Discovered Crystallization Model. Angew Chem Int Ed Engl 2024; 63:e202408937. [PMID: 38958453 DOI: 10.1002/anie.202408937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Revised: 07/02/2024] [Accepted: 07/02/2024] [Indexed: 07/04/2024]
Abstract
Rapidly synthesizing high-quality two-dimensional covalent organic frameworks (2D COFs) is crucial for their practical applications. While strategies such as slow monomer addition have been developed based on an empirical understanding of their formation process, quantitative guidance remains absent, which prohibits precise optimizations of the experimental conditions. Here, we use a machine-learning approach that overcomes the challenges associated with bottom-up model derivation for the non-classical 2D COF crystallization processes. The resulting model, referred to as NEgen1, establishes correlations among the induction time, nucleation rate, growth rate, bond-forming rate constants, and common solution synthesis conditions for 2D COFs that grow by a nucleation-elongation mechanism. The results elucidate the detailed competition between the nucleation and growth dynamics in solution, which has been inappropriately described previously by classical, empirical models with assumptions invalid for 2D COF polymerization. By understanding the dynamic processes at play, the NEgen1 model reveals a simple strategy of gradually increasing monomer addition speed for growing large 2D COF crystals. This insight enables us to rapidly synthesize large COF-5 colloids, which could only be achieved previously by prolonged reaction times or by introducing chemical modulators. These results highlight the potential for systematically improving the crystal quality of 2D COFs, which has wide-reaching relevance for many of the applications where 2D COFs are speculated to be valuable.
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Affiliation(s)
- Jiaxin Tian
- School of Microelectronics, Shanghai University, Jiading, Shanghai, 201800, China
| | - Kiana A Treaster
- George and Josephine Butler Polymer Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida, 32611-7200, United States
| | - Liangtao Xiong
- School of Microelectronics, Shanghai University, Jiading, Shanghai, 201800, China
| | - Zixiao Wang
- School of Microelectronics, Shanghai University, Jiading, Shanghai, 201800, China
| | - Austin M Evans
- George and Josephine Butler Polymer Laboratory, Department of Chemistry, University of Florida, Gainesville, Florida, 32611-7200, United States
| | - Haoyuan Li
- School of Microelectronics, Shanghai University, Jiading, Shanghai, 201800, China
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4
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Dong J, Liu Y, Cui Y. Emerging chiral two-dimensional materials. Nat Chem 2024; 16:1398-1407. [PMID: 39169158 DOI: 10.1038/s41557-024-01595-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 07/04/2024] [Indexed: 08/23/2024]
Abstract
Research into 2D materials has been growing with impressive speed since the discovery of graphene. Such layered materials with ultrathin morphologies and extreme aspect ratios currently display a vast range of properties; however, until recently a conspicuously missing property of 2D materials was global chirality. The situation has changed over the past few years with the implementation of several distinct types of ultrathin chiral 2D crystals. Here we offer a forward-looking perspective on this field to comprehend the fundamentals of global chirality in two dimensions and develop new directions. We specifically discuss the experimental achievements of the emerging chiral 2D materials with a focus on their design strategy, synthesis, structural characterization, fundamental physical properties and possible applications. We will highlight how the molecular-scale local chirality could be significantly transmitted and amplified throughout ultrathin single-crystalline 2D structures, resulting in distinctive global chirality that brings more sophisticated functions.
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Affiliation(s)
- Jinqiao Dong
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, P. R. China
| | - Yan Liu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, P. R. China
| | - Yong Cui
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, P. R. China.
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5
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Cheng YZ, Yang DH, Ji W, Hao PY, Ma P, Wang J, Niu J, Ding X, Zhang L, Han BH. Restricted Growth of Vinylene-Linked Covalent Organic Frameworks along Two-Dimensional Plane Using Heterogeneous Catalysis. J Am Chem Soc 2024; 146:22959-22969. [PMID: 39106438 DOI: 10.1021/jacs.4c01836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
The vinylene-linked covalent organic frameworks (viCOFs) have been generally synthesized in the presence of homogeneous catalysts such as KOH or trifluoroacetic acid. However, highly ordered viCOFs cannot always be obtained due to the uncommitted growth of viCOF layers in the homogeneous system with ubiquitous catalysts. Here, we propose a scalable protocol to restrict the growth of viCOFs along the two-dimensional (2D) plane by introducing a heterogeneous catalyst, polyoxometalates (POMs). With the unique Brønsted alkalinity and catalytic surface, POMs induce the growth of 2D viCOF layers along the surface of the catalytic substrate and restrain the generation of out-of-plane branches. Based on this protocol, six typical 2D viCOFs with high crystallinity and porosity were synthesized within a shorter reaction time as compared with the reported works using the common homogeneous catalysts for viCOF synthesis. On the basis of the density functional theory calculations and experimental results, a bottom intercalation growth pattern of viCOFs was revealed during the heterogeneous reaction. The unique growth pattern greatly promotes the orderly assembly of monomers, thus shortening the reaction time and improving the crystallinity of viCOFs. Furthermore, this heterogeneous catalysis strategy is suitable for the gram-scale preparation of 2D viCOFs. These results provide a novel avenue for the synthesis of high-quality viCOFs and may bring new insights into the synthetic methodology of COFs.
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Affiliation(s)
- Yuan-Zhe Cheng
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dong-Hui Yang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Wenyan Ji
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Peng-Yuan Hao
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Pengtao Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Xuesong Ding
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Lizhi Zhang
- CAS Key Laboratory of Theoretical and Computational Nanoscience, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Bao-Hang Han
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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6
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Xu T. Highly elastic 2D covalent organic framework films of interwoven single crystals. Natl Sci Rev 2024; 11:nwae197. [PMID: 39055169 PMCID: PMC11272036 DOI: 10.1093/nsr/nwae197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Accepted: 06/04/2024] [Indexed: 07/27/2024] Open
Affiliation(s)
- Tongwen Xu
- Key Laboratory of Precision and Intelligent Chemistry, Department of Applied Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, China
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7
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Lei Z, Chen H, Huang S, Wayment LJ, Xu Q, Zhang W. New Advances in Covalent Network Polymers via Dynamic Covalent Chemistry. Chem Rev 2024; 124:7829-7906. [PMID: 38829268 DOI: 10.1021/acs.chemrev.3c00926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
Covalent network polymers, as materials composed of atoms interconnected by covalent bonds in a continuous network, are known for their thermal and chemical stability. Over the past two decades, these materials have undergone significant transformations, gaining properties such as malleability, environmental responsiveness, recyclability, crystallinity, and customizable porosity, enabled by the development and integration of dynamic covalent chemistry (DCvC). In this review, we explore the innovative realm of covalent network polymers by focusing on the recent advances achieved through the application of DCvC. We start by examining the history and fundamental principles of DCvC, detailing its inception and core concepts and noting its key role in reversible covalent bond formation. Then the reprocessability of covalent network polymers enabled by DCvC is thoroughly discussed, starting from the significant milestones that marked the evolution of these polymers and progressing to their current trends and applications. The influence of DCvC on the crystallinity of covalent network polymers is then reviewed, covering their bond diversity, synthesis techniques, and functionalities. In the concluding section, we address the current challenges faced in the field of covalent network polymers and speculates on potential future directions.
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Affiliation(s)
- Zepeng Lei
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Hongxuan Chen
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Shaofeng Huang
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Lacey J Wayment
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Qiucheng Xu
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Wei Zhang
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
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8
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Preuss MD, Schnitzer T, Jansen SAH, Meskers SCJ, Kuster THR, Lou X, Meijer EW, Vantomme G. Functionalization of Supramolecular Polymers by Dynamic Covalent Boroxine Chemistry. Angew Chem Int Ed Engl 2024; 63:e202402644. [PMID: 38716788 DOI: 10.1002/anie.202402644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Indexed: 06/04/2024]
Abstract
Molecular scaffolds that enable the combinatorial synthesis of new supramolecular building blocks are promising targets for the construction of functional molecular systems. Here, we report a supramolecular scaffold based on boroxine that enables the formation of chiral and ordered 1D supramolecular polymers, which can be easily functionalized for circularly polarized luminescence. The boroxine monomers are quantitatively synthesized in situ, both in bulk and in solution, from boronic acid precursors and cooperatively polymerize into 1D helical aggregates stabilized by threefold hydrogen-bonding and π-π stacking. We then demonstrate amplification of asymmetry in the co-assembly of chiral/achiral monomers and the co-condensation of chiral/achiral precursors in classical and in situ sergeant-and-soldiers experiments, respectively, showing fast boronic acid exchange reactions occurring in the system. Remarkably, co-condensation of pyrene boronic acid with a hydrogen-bonding chiral boronic acid results in chiral pyrene aggregation with circularly polarized excimer emission and g-values in the order of 10-3. Yet, the electron deficiency of boron in boroxine makes them chemically addressable by nucleophiles, but also sensitive to hydrolysis. With this sensitivity in mind, we provide first insights into the prospects offered by boroxine-based supramolecular polymers to make chemically addressable, functional, and adaptive systems.
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Affiliation(s)
- Marco D Preuss
- Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Tobias Schnitzer
- Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Stef A H Jansen
- Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Stefan C J Meskers
- Institute for Complex Molecular Systems and Molecular Materials and Nanosystems, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Tom H R Kuster
- Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Xianwen Lou
- Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - E W Meijer
- Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
- School of Chemistry and RNA Institute, The University of New South Wales, Sydney, NSW-2052, Australia
| | - Ghislaine Vantomme
- Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
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9
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Gruber CG, Frey L, Guntermann R, Medina DD, Cortés E. Early stages of covalent organic framework formation imaged in operando. Nature 2024; 630:872-877. [PMID: 38839960 PMCID: PMC11208157 DOI: 10.1038/s41586-024-07483-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 04/29/2024] [Indexed: 06/07/2024]
Abstract
Covalent organic frameworks (COFs) are a functional material class able to harness, convert and store energy. However, after almost 20 years of research, there are no coherent prediction rules for their synthesis conditions. This is partly because of an incomplete picture of nucleation and growth at the early stages of formation. Here we use the optical technique interferometric scattering microscopy (iSCAT)1-3 for in operando studies of COF polymerization and framework formation. We observe liquid-liquid phase separation, pointing to the existence of structured solvents in the form of surfactant-free (micro)emulsions in conventional COF synthesis. Our findings show that the role of solvents extends beyond solubility to being kinetic modulators by compartmentation of reactants and catalyst. Taking advantage of these observations, we develop a synthesis protocol for COFs using room temperature instead of elevated temperatures. This work connects framework synthesis with liquid phase diagrams and thereby enables an active design of the reaction environment, emphasizing that visualization of chemical reactions by means of light-scattering-based techniques can be a powerful approach for advancing rational materials synthesis.
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Affiliation(s)
- Christoph G Gruber
- Nanoinstitute Munich and Center for NanoScience (CeNS), Faculty of Physics, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Laura Frey
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Munich, Germany
| | - Roman Guntermann
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Munich, Germany
| | - Dana D Medina
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Munich, Germany.
| | - Emiliano Cortés
- Nanoinstitute Munich and Center for NanoScience (CeNS), Faculty of Physics, Ludwig-Maximilians-Universität München, Munich, Germany.
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10
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Yang Y, Liang B, Kreie J, Hambsch M, Liang Z, Wang C, Huang S, Dong X, Gong L, Liang C, Lou D, Zhou Z, Lu J, Yang Y, Zhuang X, Qi H, Kaiser U, Mannsfeld SCB, Liu W, Gölzhäuser A, Zheng Z. Elastic films of single-crystal two-dimensional covalent organic frameworks. Nature 2024; 630:878-883. [PMID: 38718837 DOI: 10.1038/s41586-024-07505-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 05/01/2024] [Indexed: 06/21/2024]
Abstract
The properties of polycrystalline materials are often dominated by defects; two-dimensional (2D) crystals can even be divided and disrupted by a line defect1-3. However, 2D crystals are often required to be processed into films, which are inevitably polycrystalline and contain numerous grain boundaries, and therefore are brittle and fragile, hindering application in flexible electronics, optoelectronics and separation1-4. Moreover, similar to glass, wood and plastics, they suffer from trade-off effects between mechanical strength and toughness5,6. Here we report a method to produce highly strong, tough and elastic films of an emerging class of 2D crystals: 2D covalent organic frameworks (COFs) composed of single-crystal domains connected by an interwoven grain boundary on water surface using an aliphatic bi-amine as a sacrificial go-between. Films of two 2D COFs have been demonstrated, which show Young's moduli and breaking strengths of 56.7 ± 7.4 GPa and 73.4 ± 11.6 GPa, and 82.2 ± 9.1 N m-1 and 29.5 ± 7.2 N m-1, respectively. We predict that the sacrificial go-between guided synthesis method and the interwoven grain boundary will inspire grain boundary engineering of various polycrystalline materials, endowing them with new properties, enhancing their current applications and paving the way for new applications.
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Affiliation(s)
- Yonghang Yang
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Baokun Liang
- Central Facility of Electron Microscopy, Electron Microscopy Group of Materials Science, Universität Ulm, Ulm, Germany
| | - Jakob Kreie
- Faculty of Physics, Bielefeld University, Bielefeld, Germany
| | - Mike Hambsch
- Center for Advancing Electronics Dresden and Faculty of Electrical and Computer Engineering, Dresden University of Technology, Dresden, Germany
| | - Zihao Liang
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Cheng Wang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
- Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Jieyang, Guangdong, China
| | - Senhe Huang
- The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Xin Dong
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Li Gong
- Instrumental Analysis Research Center, Sun Yat-sen University, Guangzhou, China
| | - Chaolun Liang
- Instrumental Analysis Research Center, Sun Yat-sen University, Guangzhou, China
| | - Dongyang Lou
- Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Materials Science and Engineering, Guangzhou, China
| | - Zhipeng Zhou
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Jiaxing Lu
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Yang Yang
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China
| | - Xiaodong Zhuang
- The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Haoyuan Qi
- Central Facility of Electron Microscopy, Electron Microscopy Group of Materials Science, Universität Ulm, Ulm, Germany
| | - Ute Kaiser
- Central Facility of Electron Microscopy, Electron Microscopy Group of Materials Science, Universität Ulm, Ulm, Germany
| | - Stefan C B Mannsfeld
- Center for Advancing Electronics Dresden and Faculty of Electrical and Computer Engineering, Dresden University of Technology, Dresden, Germany
| | - Wei Liu
- Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Materials Science and Engineering, Guangzhou, China
| | | | - Zhikun Zheng
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, GBRCE for Functional Molecular Engineering, Guangdong Engineering Technology Research Centre for High-performance Organic and Polymer Photoelectric Functional Films, School of Chemistry, IGCME and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China.
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China.
- Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Jieyang, Guangdong, China.
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11
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Wang L, Wang X, Zhao ZL, Wan LJ, Wang D. Stranski-Krastanov Growth of Two-Dimensional Covalent Organic Framework Films. J Am Chem Soc 2024; 146:14079-14085. [PMID: 38720291 DOI: 10.1021/jacs.4c02418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
Insights into the formation mechanisms of two-dimensional covalent organic frameworks (2D COFs) at both the in-plane and interlayer levels are essential for improving material quality and synthetic methodology. Here, we report the controllable preparation of 2D COF films via on-surface synthesis and investigate the growth mechanism using atomic force microscopy. Monolayer, bilayer, and layer-plus-island multilayer COF films were successfully constructed on hexagonal boron nitride in a controlled manner. The porphyrin-based COF films grow in the Stranski-Krastanov mode, i.e., a uniform bilayer COF film can be formed through layer-by-layer growth in the initial stage followed by island growth starting from the third layer. Furthermore, fluorescence quenching caused by π-π stacking interactions between 2D COF neighboring layers was revealed. These results provide new perspectives on the synthesis of high-quality 2D COF films with controllable thickness and morphology, paving the way for a diverse range of applications.
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Affiliation(s)
- Lu Wang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiang Wang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhen-Lian Zhao
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li-Jun Wan
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dong Wang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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12
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Meng T, Xiao X, Deng K, Zeng Q. Study on 2D Molecular Networks of Flexible Pentacarboxylic Acid Ligands Induced by Ether Bonds in Response to Selective Guest Inclusion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10737-10744. [PMID: 38718162 DOI: 10.1021/acs.langmuir.4c00886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
The flexibility of ligands allows for their bending, twisting, or rotation to adopt various conformations, leading to distinct symmetries during the self-assembled process. Flexible aromatic acid ligands modified by ether bonds are a promising type of self-assembled module when it comes to surfaces. Here, two pentacarboxylic acid ligands (H5L1 and H5L2) with minor skeleton differences have successfully self-assembled into disparate porous networks on the graphite surface and demonstrated excellent potential for the inclusion of guest molecules. The H5L1 molecule's network structure only accommodates coronene (COR) molecules. With fewer COR molecules, H5L1 molecules act as a host template to accommodate the COR molecules. When there are too many COR molecules, COR molecules will induce H5L1 molecules to transform into a new host-guest nanostructure. Additionally, H5L2 molecules showed the ability to capture C70 molecules and exhibited cavity selectivity. However, the assembled network of H5L2 was slightly deformed in attempts to trap the COR molecules. To understand these phenomena more deeply, various assembled mechanisms were analyzed in combination with building theoretical models and energy analysis. These results reveal the great potential of flexible aromatic acid ligands in two-dimensional self-assembly and host-guest systems for their application in related fields.
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Affiliation(s)
- Ting Meng
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- College of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang 315211, P. R. China
| | - Xunwen Xiao
- College of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang 315211, P. R. China
| | - Ke Deng
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Qingdao Zeng
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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13
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Fu Z, Arisnabarreta N, Mali KS, De Feyter S. Deciphering the factors influencing electric field mediated polymerization and depolymerization at the solution-solid interface. Commun Chem 2024; 7:106. [PMID: 38724622 PMCID: PMC11082217 DOI: 10.1038/s42004-024-01187-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 04/25/2024] [Indexed: 05/12/2024] Open
Abstract
Strong and oriented electric fields are known to influence structure as well as reactivity. The strong electric field (EF) between the tip of a scanning tunneling microscope (STM) and graphite has been used to modulate two-dimensional (2D) polymerization of aryl boronic acids where switching the polarity of the substrate bias enabled reversible transition between self-assembled molecular networks of monomers and crystalline 2D polymer (2DP) domains. Here, we untangle the different factors influencing the EF-mediated (de)polymerization of a boroxine-based 2DP on graphite. The influence of the solvent was systematically studied by varying the nature from polar protic to polar aprotic to non-polar. The effect of monomer concentration was also investigated in detail with a special focus on the time-dependence of the transition. Our experimental observations indicate that while the nucleation of 2DP domains is not initiated by the applied electric field, their depolymerization and subsequent desorption, are a consequence of the change in the polarity of the substrate bias within the area scanned by the STM tip. We conclude that the reversible transition is intimately linked to the bias-induced adsorption and desorption of the monomers, which, in turn, could drive changes in the local concentration of the monomers.
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Affiliation(s)
- Zhinan Fu
- Division of Molecular Imaging and Photonics, Department of Chemistry, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Nicolás Arisnabarreta
- Division of Molecular Imaging and Photonics, Department of Chemistry, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Kunal S Mali
- Division of Molecular Imaging and Photonics, Department of Chemistry, Celestijnenlaan 200F, Leuven, 3001, Belgium.
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry, Celestijnenlaan 200F, Leuven, 3001, Belgium.
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14
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Luo L, Hou L, Cui X, Zhan P, He P, Dai C, Li R, Dong J, Zou Y, Liu G, Liu Y, Zheng J. Self-condensation-assisted chemical vapour deposition growth of atomically two-dimensional MOF single-crystals. Nat Commun 2024; 15:3618. [PMID: 38684675 PMCID: PMC11059375 DOI: 10.1038/s41467-024-48050-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 04/16/2024] [Indexed: 05/02/2024] Open
Abstract
Two-dimensional metal-organic frameworks (MOFs) have a wide variety of applications in molecular separation and other emerging technologies, including atomically thin electronics. However, due to the inherent fragility and strong interlayer interactions, high-quality MOF crystals of atomic thickness, especially isolated MOF crystal monolayers, have not been easy to prepare. Here, we report the self-condensation-assisted chemical vapour deposition growth of atomically thin MOF single-crystals, yielding monolayer single-crystals of poly[Fe(benzimidazole)2] up to 62 μm in grain sizes. By using transmission electron microscopy and high-resolution atomic force microscopy, high crystallinity and atomic-scale single-crystal structure are verified in the atomically MOF flakes. Moreover, integrating such MOFs with MoS2 to construct ultrathin van der Waals heterostructures is achieved by direct growth of atomically MOF single-crystals onto monolayer MoS2, and enables a highly selective ammonia sensing. These demonstrations signify the great potential of the method in facilitating the development of the fabrication and application of atomically thin MOF crystals.
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Affiliation(s)
- Lingxin Luo
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Lingxiang Hou
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China
| | - Xueping Cui
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China.
| | - Pengxin Zhan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Ping He
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Chuying Dai
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China
- University of Chinese Academy of Sciences, 100049, Beijing, China
| | - Ruian Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China
| | - Jichen Dong
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China
| | - Ye Zou
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China
| | - Guoming Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China
| | - Yanpeng Liu
- State Key Laboratory of Mechanics and Control for Aerospace Structures and Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics, 210016, Nanjing, China
| | - Jian Zheng
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, China.
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15
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Hao W, Sui C, Cheng G, Li J, Miao L, Zhao G, Sang Y, Li J, Zhao C, Zhou Y, Zang Z, Zhao Y, He X, Wang C. Dynamic Insights into the Growth Mechanisms of 2D Covalent Organic Frameworks on Graphene Surfaces. ACS NANO 2024; 18:10485-10494. [PMID: 38564695 DOI: 10.1021/acsnano.3c11787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Producing high-quality two-dimensional (2D) covalent organic frameworks (COFs) is crucial for industrial applications. However, this remains significantly challenging with current synthetic techniques. A deep understanding of the intermolecular interactions, reaction temperature, and oligomers is essential to facilitate the growth of highly crystalline COF films. Herein, molecular dynamics simulations were employed to explore the growth of 2D COFs from monomer assemblies on graphene. Our results showed that chain growth reactions dominated the COF surface growth and that van der Waals (vdW) interactions were important in enhancing the crystallinity through monomer preorganization. Moreover, appropriately tuning the reaction temperature improved the COF crystallinity and minimized the effects of amorphous oligomers. Additionally, the strength of the interface between the COF and the graphene substrate indicated that the adhesion force was proportional to the crystallinity of the COF. This work reveals the mechanisms for nucleation and growth of COFs on surfaces and provides theoretical guidance for fabricating high-quality 2D polymer-based crystalline nanomaterials.
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Affiliation(s)
- Weizhe Hao
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
| | - Chao Sui
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Gong Cheng
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Junjiao Li
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
| | - Linlin Miao
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Guoxin Zhao
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Yuna Sang
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
| | - Jiaxuan Li
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Chenxi Zhao
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Yichen Zhou
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Zifu Zang
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
| | - Yushun Zhao
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Xiaodong He
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Chao Wang
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
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16
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Hao W, Sui C, Cheng G, Li J, Sang Y, Zhao C, Zhou Y, Zang Z, Zhao Y, He X, Wang C. High-Strength Polycrystalline Covalent Organic Framework with Abnormal Thermal Transport Insensitive to Grain Boundary. NANO LETTERS 2024; 24:4248-4255. [PMID: 38557042 DOI: 10.1021/acs.nanolett.4c00570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Grain boundaries (GBs) in two-dimensional (2D) covalent organic frameworks (COFs) unavoidably form during the fabrication process, playing pivotal roles in the physical characteristics of COFs. Herein, molecular dynamics simulations were employed to elucidate the fracture failure and thermal transport mechanisms of polycrystalline COFs (p-COFs). The results revealed that the tilt angle of GBs significantly influences out-of-plane wrinkles and residual stress in monolayer p-COFs. The tensile strength of p-COFs can be enhanced and weakened with the tilt angle, which exhibits an inverse relationship with the defect density. The crack always originates from weaker heptagon rings during uniaxial tension. Notably, the thermal transport in p-COFs is insensitive to the GBs due to the variation of minor polymer chain length at defects, which is abnormal for other 2D crystalline materials. This study contributes insights into the impact of GBs in p-COFs and offers theoretical guidance for structural design and practical applications of advanced COFs.
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Affiliation(s)
- Weizhe Hao
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
| | - Chao Sui
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Gong Cheng
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Junjiao Li
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
| | - Yuna Sang
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
| | - Chenxi Zhao
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Yichen Zhou
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Zifu Zang
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
| | - Yushun Zhao
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Xiaodong He
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
| | - Chao Wang
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China
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17
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Ren Y, Xu Y. Recent advances in two-dimensional polymers: synthesis, assembly and energy-related applications. Chem Soc Rev 2024; 53:1823-1869. [PMID: 38192222 DOI: 10.1039/d3cs00782k] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
Two-dimensional polymers (2DPs) are a class of 2D crystalline polymer materials with definite structures, which have outstanding physical-chemical and electronic properties. They cleverly link organic building units through strong covalent bonds and can construct functional 2DPs through reasonable design and selection of different monomer units to meet various application requirements. As promising energy materials, 2DPs have developed rapidly in recent years. This review first introduces the basic overview of 2DPs, such as their historical development, inherent 2D characteristics and diversified topological advantages, followed by the summary of the typical 2DP synthesis methods recently (including "top-down" and "bottom-up" methods). The latest research progress in assembly and processing of 2DPs and the energy-related applications in energy storage and conversion are also discussed. Finally, we summarize and prospect the current research status, existing challenges, and future research directions of 2DPs.
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Affiliation(s)
- Yumei Ren
- School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China.
- School of Materials Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450046, China
| | - Yuxi Xu
- School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China.
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18
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Zhang L, Fan X, Wang J, Zhang C, Laipan M, Guo J. Tailoring hierarchical nanostructures of tannin acid/alginate beads for straightforward selective recovery of high-purity Au(0) from aqueous solution. Carbohydr Polym 2024; 324:121534. [PMID: 37985108 DOI: 10.1016/j.carbpol.2023.121534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/09/2023] [Accepted: 10/26/2023] [Indexed: 11/22/2023]
Abstract
The utilization of biomass materials with functional properties and rational porous structures holds significant potential for the recovery of precious metals from secondary resources, while facing challenges in achieving rapid reduction and high recovery rates of metallic Au(0). Herein, a novel concept of achieving high-purity Au(0) efficiently by tailoring tannin acid (TA) architecture and porous structure of TA-functionalized alginate beads (P-TOSA). Optimized by structural engineering, the hierarchically nanostructured P-TOSA beads demonstrate exceptional selectivity and recovery capacity (756.1 ± 2.7 mg/g at pH 5), while maintaining a recovery efficiency of over 99 % across a broad range of pH values (1.0-8.0) through the synergistic combination of chelation-based chemisorption and phenolic groups-based redox reaction. Notably, the TA-based nanostructure-boosted reduced Au(0) served as nucleation sites, facilitating elongation and migration of gold crystals across the vein network, thus forming a shell composed with 90.4 ± 0.4 % of element gold. UV radiation exposure could further generate a dynamic redox system and expedite Au (III) reduction to ultra-high purity Au(0) (93.3 ± 1.1 %) via abnormal grain growth mode. Therefore, this study presents a practical and straightforward approach utilizing biomass microbeads for recycling precious metals in metallic form without the use of toxic eluents or additional reductants.
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Affiliation(s)
- Lei Zhang
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi' an 710021, PR China
| | - Xiaohu Fan
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi' an 710021, PR China
| | - Jiayuan Wang
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi' an 710021, PR China
| | - Chao Zhang
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi' an 710021, PR China
| | - Minwang Laipan
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi' an 710021, PR China
| | - Junkang Guo
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi' an 710021, PR China.
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19
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Yang Y, Lin E, Wang S, Wang T, Wang Z, Zhang Z. Single-Crystal One-Dimensional Porous Ladder Covalent Polymers. J Am Chem Soc 2024; 146:782-790. [PMID: 38165084 DOI: 10.1021/jacs.3c10812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
The synthesis of single-crystal, one-dimensional (1D) polymers is of great importance but a formidable challenge. Herein, we report the synthesis of single-crystal 1D ladder polymers in solution by dynamic covalent chemistry. The three-dimensional electron diffraction technique was used to rigorously solve the structure of the crystalline polymers, unveiling that each polymer chain is connected by double covalent bridges and all polymer chains are packed in a staggered and interlaced manner by π-π stacking and hydrogen bonding interactions, making the crystalline polymers highly robust in both thermal and chemical stability. The synthesized single-crystal polymers possess permanent micropores and can efficiently remove CO2 from the C2H2/CO2 mixture to obtain high-purity C2H2, validated by dynamic breakthrough experiments. This work demonstrates the first example of constructing single-crystal 1D porous ladder polymers with double covalent bridges in solution for efficient C2H2/CO2 separation.
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Affiliation(s)
- Yi Yang
- State Key Laboratory of Medicine Chemistry Biology, College of Chemistry, Nankai University, Tianjin 300071, China
| | - En Lin
- State Key Laboratory of Medicine Chemistry Biology, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Sa Wang
- State Key Laboratory of Medicine Chemistry Biology, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ting Wang
- State Key Laboratory of Medicine Chemistry Biology, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhifang Wang
- State Key Laboratory of Medicine Chemistry Biology, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhenjie Zhang
- State Key Laboratory of Medicine Chemistry Biology, College of Chemistry, Nankai University, Tianjin 300071, China
- Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Nankai University, Tianjin 300071, China
- Frontiers Science Center for New Organic Matter, Tianjin 300071, China
- Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300071, China
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20
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Situ B, Zhang Z, Zhao L, Tu Y. Graphene oxide-based large-area dynamic covalent interfaces. NANOSCALE 2023; 15:17739-17750. [PMID: 37916524 DOI: 10.1039/d3nr04239a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
Dynamic materials, being capable of reversible structural adaptation in response to the variation of external surroundings, have experienced significant advancements in the past several decades. In particular, dynamic covalent materials (DCMs), where the dynamic covalent bonds (DCBs) can reversibly break and reform under defined conditions, present superior dynamic characteristics, such as self-adaptivity, self-healing and shape memory. However, the dynamic characteristics of DCBs are mainly limited within the length scale of covalent bonds, due to the local position exchange or the inter-distance variation between the chemical compositions involved in the reversible covalent reactions. In this minireview, a discussion regarding the realization of long-range migration of chemical compositions along the interfaces of graphene oxide (GO)-based materials via the spatially connected and consecutive occurrence of DCB-based reversible covalent reactions is presented, and the interfaces are termed "large-area dynamic covalent interfaces (LDCIs)". The effective strategies, including water adsorption, interfacial curvature and metal-substrate support, as well as the potential applications of LDCIs in water dissociation and humidity sensing are summarized. Additionally, we also give an outlook on potential strategies to realize LDCIs on other 2D carbon-based materials, including the interfacial morphology and periodic element doping. This minireview provides insights into the realization of LDCIs on a wider range of 2D materials, and offers a theoretical perspective for advancing materials with long-range dynamic characteristics and improved performance, including controlled drug delivery/release and high-efficiency (bio)sensing.
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Affiliation(s)
- Boyi Situ
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Jiangsu 225009, China.
| | - Zhe Zhang
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Jiangsu 225009, China.
| | - Liang Zhao
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Jiangsu 225009, China.
| | - Yusong Tu
- College of Physics Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Jiangsu 225009, China.
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21
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Hu J, Huang Z, Liu Y. Beyond Solvothermal: Alternative Synthetic Methods for Covalent Organic Frameworks. Angew Chem Int Ed Engl 2023; 62:e202306999. [PMID: 37265002 DOI: 10.1002/anie.202306999] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/01/2023] [Accepted: 06/02/2023] [Indexed: 06/03/2023]
Abstract
Covalent organic frameworks (COFs) are crystalline porous organic materials that hold a wealth of potential applications across various fields. The development of COFs, however, is significantly impeded by the dearth of efficient synthetic methods. The traditional solvothermal approach, while prevalent, is fraught with challenges such as complicated processes, excessive energy consumption, long reaction times, and limited scalability, rendering it unsuitable for practical applications. The quest for simpler, quicker, more energy-efficient, and environmentally benign synthetic strategies is thus paramount for bridging the gap between academic COF chemistry and industrial application. This Review provides an overview of the recent advances in alternative COF synthetic methods, with a particular emphasis on energy input. We discuss representative examples of COF synthesis facilitated by microwave, ultrasound, mechanic force, light, plasma, electric field, and electron beam. Perspectives on the advantages and limitations of these methods against the traditional solvothermal approach are highlighted.
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Affiliation(s)
- Jiyun Hu
- School of Physical Sciences, Great Bay University, Dongguan, Guangdong 523000, China
| | - Zhiyuan Huang
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Yi Liu
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
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22
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Fabozzi FG, Severin N, Rabe JP, Hecht S. Room Temperature On-Surface Synthesis of a Vinylene-Linked Single Layer Covalent Organic Framework. J Am Chem Soc 2023; 145:18205-18209. [PMID: 37561921 DOI: 10.1021/jacs.3c04730] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Conjugated single-layered two-dimensional covalent organic frameworks are flat and extended polymer networks with a unique combination of material properties, giving rise to potential applications in sensing, optoelectronics, and photonics. Despite their great potential, thus far only a few reactions to access such extended conjugated 2D polymers have been reported. Here, the on-surface polymerization of the first vinylene-linked single layered two-dimensional covalent organic framework using reversible Knoevenagel polycondensation under solvothermal conditions is described. Self-assembly of the two monomer building blocks at the solid-liquid interface led to the formation of extended covalent networks at room temperature without the need of additional catalysts or reagents. The described approach grants access to extended conjugated 2D polymers under unprecedentedly mild conditions and paves the way to new hybrid material systems.
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Affiliation(s)
- Filippo Giovanni Fabozzi
- DWI - Leibniz Institute for Interactive Materials, Aachen 52074, Germany
- Department of Chemistry, IRIS Adlershof and Center for the Science of Materials Berlin, Humboldt-Universität zu Berlin, Berlin 12489, Germany
| | - Nikolai Severin
- Department of Physics, IRIS Adlershof and Center for the Science of Materials Berlin, Humboldt-Universität zu Berlin, Berlin 12489, Germany
| | - Jürgen P Rabe
- Department of Physics, IRIS Adlershof and Center for the Science of Materials Berlin, Humboldt-Universität zu Berlin, Berlin 12489, Germany
| | - Stefan Hecht
- DWI - Leibniz Institute for Interactive Materials, Aachen 52074, Germany
- Department of Chemistry, IRIS Adlershof and Center for the Science of Materials Berlin, Humboldt-Universität zu Berlin, Berlin 12489, Germany
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23
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Liu S, Norikane Y, Kikkawa Y. Two-dimensional molecular networks at the solid/liquid interface and the role of alkyl chains in their building blocks. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2023; 14:872-892. [PMID: 37674543 PMCID: PMC10477993 DOI: 10.3762/bjnano.14.72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 07/25/2023] [Indexed: 09/08/2023]
Abstract
Nanoarchitectonics has attracted increasing attention owing to its potential applications in nanomachines, nanoelectronics, catalysis, and nanopatterning, which can contribute to overcoming global problems related to energy and environment, among others. However, the fabrication of ordered nanoarchitectures remains a challenge, even in two dimensions. Therefore, a deeper understanding of the self-assembly processes and substantial factors for building ordered structures is critical for tailoring flexible and desirable nanoarchitectures. Scanning tunneling microscopy is a powerful tool for revealing the molecular conformations, arrangements, and orientations of two-dimensional (2D) networks on surfaces. The fabrication of 2D assemblies involves non-covalent interactions that play a significant role in the molecular arrangement and orientation. Among the non-covalent interactions, dispersion interactions that derive from alkyl chain units are believed to be weak. However, alkyl chains play an important role in the adsorption onto substrates, as well as in the in-plane intermolecular interactions. In this review, we focus on the role of alkyl chains in the formation of ordered 2D assemblies at the solid/liquid interface. The alkyl chain effects on the 2D assemblies are introduced together with examples documented in the past decades.
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Affiliation(s)
- Suyi Liu
- Graduate School of Science and Technology, University of Tsukuba, Ibaraki, 305-8571, Japan
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Yasuo Norikane
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- Faculty of Pure and Applied Sciences, University of Tsukuba, Ibaraki, 305-8571, Japan
| | - Yoshihiro Kikkawa
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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24
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Liu JW, Wang Y, Kang LX, Zhao Y, Xing GY, Huang ZY, Zhu YC, Li DY, Liu PN. Two-Dimensional Crystal Transition from Radialene to Cumulene on Ag(111) via Retro-[2 + 1] Cycloaddition. J Am Chem Soc 2023. [PMID: 37289993 DOI: 10.1021/jacs.3c00962] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Two-dimensional (2D) crystal-to-crystal transition is an important method in crystal engineering because of its ability to directly create diverse crystal materials from one crystal. However, steering a 2D single-layer crystal-to-crystal transition on surfaces with high chemo- and stereoselectivity under ultra-high vacuum conditions is a great challenge because the transition is a complex dynamic process. Here, we report a highly chemoselective 2D crystal transition from radialene to cumulene with retention of stereoselectivity on Ag(111) via retro-[2 + 1] cycloaddition of three-membered carbon rings and directly visualize the transition process involving a stepwise epitaxial growth mechanism by the combination of scanning tunneling microscopy and non-contact atomic force microscopy. Using progression annealing, we found that isocyanides on Ag(111) at a low annealing temperature underwent sequential [1 + 1 + 1] cycloaddition and enantioselective molecular recognition based on C-H···Cl hydrogen bonding interactions to form 2D triaza[3]radialene crystals. In contrast, a higher annealing temperature induced the transformation of triaza[3]radialenes to generate trans-diaza[3]cumulenes, which were further assembled into 2D cumulene-based crystals through twofold N-Ag-N coordination and C-H···Cl hydrogen bonding interactions. By combining the observed distinct transient intermediates and density functional theory calculations, we demonstrate that the retro-[2 + 1] cycloaddition reaction proceeds via the ring opening of a three-membered carbon ring, sequential dechlorination/hydrogen passivation, and deisocyanation. Our findings provide new insights into the growth mechanism and dynamics of 2D crystals and have implications for controllable crystal engineering.
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Affiliation(s)
- Jian-Wei Liu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Ying Wang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Li-Xia Kang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yan Zhao
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Guang-Yan Xing
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Zheng-Yang Huang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Ya-Cheng Zhu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Deng-Yuan Li
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
| | - Pei-Nian Liu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, State Key Laboratory of Chemical Engineering, School of Chemistry and Molecular Engineering, East China University of Science & Technology, 130 Meilong Road, Shanghai 200237, China
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25
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Wang S, Reddy VA, Ang MCY, Cui J, Khong DT, Han Y, Loh SI, Cheerlavancha R, Singh GP, Rajani S, Strano MS. Single-Crystal 2D Covalent Organic Frameworks for Plant Biotechnology. J Am Chem Soc 2023. [PMID: 37230942 DOI: 10.1021/jacs.3c01783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Molecules chemically synthesized as periodic two-dimensional (2D) frameworks via covalent bonds can form some of the highest-surface area and -charge density particles possible. There is significant potential for applications such as nanocarriers in life sciences if biocompatibility can be achieved; however, significant synthetic challenges remain in avoiding kinetic traps from disordered linking during 2D polymerization of compatible monomers, resulting in isotropic polycrystals without a long-range order. Here, we establish thermodynamic control over dynamic control on the 2D polymerization process of biocompatible imine monomers by minimizing the surface energy of nuclei. As a result, polycrystal, mesocrystal, and single-crystal 2D covalent organic frameworks (COFs) are obtained. We achieve COF single crystals by exfoliation and minification methods, forming high-surface area nanoflakes that can be dispersed in aqueous medium with biocompatible cationic polymers. We find that these 2D COF nanoflakes with high surface area are excellent plant cell nanocarriers that can load bioactive cargos, such as the plant hormone abscisic acid (ABA) via electrostatic attraction, and deliver them into the cytoplasm of intact living plants, traversing through the cell wall and cell membrane due to their 2D geometry. This synthetic route to high-surface area COF nanoflakes has promise for life science applications including plant biotechnology.
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Affiliation(s)
- Song Wang
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, Singapore 138602, Singapore
| | | | - Mervin Chun-Yi Ang
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, Singapore 138602, Singapore
| | - Jianqiao Cui
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Duc Thinh Khong
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, Singapore 138602, Singapore
| | - Yangyang Han
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, Singapore 138602, Singapore
| | - Suh In Loh
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, Singapore 138602, Singapore
| | - Raju Cheerlavancha
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, Singapore 138602, Singapore
| | - Gajendra Pratap Singh
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, Singapore 138602, Singapore
| | - Sarojam Rajani
- Temasek Life Sciences Laboratory Limited, Singapore 117604, Singapore
| | - Michael S Strano
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, Singapore 138602, Singapore
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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26
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Wang C, Lyu P, Chen Z, Xu Y. Green and Scalable Synthesis of Atomic-Thin Crystalline Two-Dimensional Triazine Polymers with Ultrahigh Photocatalytic Properties. J Am Chem Soc 2023. [PMID: 37171112 DOI: 10.1021/jacs.3c02874] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Scalable and eco-friendly synthesis of crystalline two-dimensional (2D) polymers with proper band gap and single-layer thickness is highly desired for the fundamental research and practical applications of 2D polymers; however, it remains a considerable and unresolved challenge. Herein, we report a convenient and robust method to synthesize a series of crystalline covalent triazine framework nanosheets (CTF NSs) with a thickness of ∼80 nm via a new solvent-free salt-catalyzed nitrile cyclotrimerization process, which enables the cost-effective large-scale preparation of crystalline CTF NSs at the hundred-gram level. Theoretical calculations and detailed experiments revealed for the first time that the conventional salts such as KCl can not only act as physical templates as traditionally believed but also more importantly can efficiently catalyze the cyclotrimerization reaction of carbonitrile monomers as a new kind of green solid catalysts to achieve crystalline CTF NSs. Upon simple liquid-phase sonication, these CTF NSs can be easily further exfoliated into abundant single-layer crystalline 2D triazine polymers (2D-TPs) in high yields. The obtained atomically thin crystalline 2D-TPs with a band gap of 2.36 eV and rich triazine active groups exhibited a remarkable photocatalytic hydrogen evolution rate of 1321 μmol h-1 under visible light irradiation with an apparent quantum yield up to 29.5% at 420 nm and excellent photocatalytic overall water splitting activity with a solar-to-hydrogen efficiency up to 0.35%, which exceed all molecular framework materials and are among the best metal-free photocatalysts ever reported. Moreover, the processable 2D-TPs could be readily assembled on a support as a photocatalytic film device, which demonstrated superior photocatalytic performance (135.2 mmol h-1 m-2 for hydrogen evolution).
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Affiliation(s)
- Congxu Wang
- Zhejiang University, Hangzhou 310027, Zhejiang Province, China
- School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China
| | - Pengbo Lyu
- Hunan Provincial Key Laboratory of Thin Film Materials and Devices, School of Material Sciences and Engineering, Xiangtan University, Xiangtan 411105, Hunan Province, China
| | - Zhong Chen
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Instrumentation and Service Center for Molecular Sciences, Westlake University, Hangzhou 310024, Zhejiang Province, China
| | - Yuxi Xu
- School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China
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27
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Yin C, Liu M, Zhang Z, Wei M, Shi X, Zhang Y, Wang J, Wang Y. Perpendicular Alignment of Covalent Organic Framework (COF) Pore Channels by Solvent Vapor Annealing. J Am Chem Soc 2023; 145:11431-11439. [PMID: 37162483 DOI: 10.1021/jacs.3c03198] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Covalent organic frameworks (COFs) have showcased great potential in diverse applications such as separation and catalysis, where mass transfer confined in their pore channels plays a significant role. However, anisotropic orientation usually occurs in polycrystalline COFs, and perpendicular alignment of COF pore channels is ultimately desired to maximize their performance. Herein, we demonstrate a strategy, solvent vapor annealing, to reorient COF pore channels from anisotropic orientation to perpendicular alignment. COF thin films are first synthesized to have flexible N-H bonds in their skeletons, thus having structural mobility to enable molecular rearrangement. A solvent with low relative permittivity and a conjugated structure is then identified to have a strong affinity toward the COFs, allowing its vapor to easily penetrate into the COF interlayers. The solvent vapor weakens the π-π interaction and consequently allows the COF monolayers to dissociate. The COF monolayers undergo a reorientation process that converts from random stacking into the face-on stacking fashion, in which the through COF pores are perpendicularly aligned. The aligned COF film exhibits high separation precision toward ions featuring a size difference down to 2 Å, which is 8 times higher than that of the anisotropically oriented counterpart. This work opens up an avenue for COF orientation regulation by solvent vapor annealing and reveals the essential role of the perpendicular alignment of COF pore channels to enable precision separations.
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Affiliation(s)
- Congcong Yin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, P. R. China
- School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, P. R. China
| | - Ming Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, P. R. China
| | - Zhe Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, P. R. China
| | - Mingjie Wei
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, P. R. China
| | - Xiansong Shi
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, P. R. China
| | - Yatao Zhang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, P. R. China
| | - Jingtao Wang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, Henan, P. R. China
| | - Yong Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, P. R. China
- School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, P. R. China
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28
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Zhou Z, Zhang L, Yang Y, Vitorica-Yrezabal IJ, Wang H, Tan F, Gong L, Li Y, Chen P, Dong X, Liang Z, Yang J, Wang C, Hong Y, Qiu Y, Gölzhäuser A, Chen X, Qi H, Yang S, Liu W, Sun J, Zheng Z. Growth of single-crystal imine-linked covalent organic frameworks using amphiphilic amino-acid derivatives in water. Nat Chem 2023:10.1038/s41557-023-01181-6. [PMID: 37037913 DOI: 10.1038/s41557-023-01181-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 03/14/2023] [Indexed: 04/12/2023]
Abstract
A core feature of covalent organic frameworks (COFs) is crystallinity, but current crystallization processes rely substantially on trial and error, chemical intuition and large-scale screening, which typically require harsh conditions and low levels of supersaturation, hampering the controlled synthesis of single-crystal COFs, particularly on large scales. Here we report a strategy to produce single-crystal imine-linked COFs in aqueous solutions under ambient conditions using amphiphilic amino-acid derivatives with long hydrophobic chains. We propose that these amphiphilic molecules self-assemble into micelles that serve as dynamic barriers to separate monomers in aqueous solution (nodes) and hydrophobic compartments of the micelles (linkers), thereby regulating the polymerization and crystallization processes. Disordered polyimines were obtained in the micelle, which were then converted into crystals in a step-by-step fashion. Five different three-dimensional COFs and a two-dimensional COF were obtained as single crystals on the gram scale, with yields of 92% and above.
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Affiliation(s)
- Zhipeng Zhou
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Lei Zhang
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences Peking University, Beijing, China
| | - Yonghang Yang
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | | | - Honglei Wang
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Fanglin Tan
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Li Gong
- Instrumental Analysis Research Center, Sun Yat-sen University, Guangzhou, China
| | - Yuyao Li
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Pohua Chen
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences Peking University, Beijing, China
| | - Xin Dong
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Zihao Liang
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Jing Yang
- Key Laboratory of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Materials Science and Engineering, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Chao Wang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou, China
| | - Yuexian Hong
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
| | - Yi Qiu
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences Peking University, Beijing, China
| | | | - Xudong Chen
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China
- Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Jieyang, Guangdong, China
| | - Haoyuan Qi
- Central Facility of Electron Microscopy, Electron Microscopy Group of Materials Science, Universität Ulm, Ulm, Germany
| | - Sihai Yang
- Department of Chemistry and Photon Science Institute, The University of Manchester, Manchester, UK
| | - Wei Liu
- Key Laboratory of Low-Carbon Chemistry and Energy Conservation of Guangdong Province, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Materials Science and Engineering, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China.
- Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Jieyang, Guangdong, China.
| | - Junliang Sun
- College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences Peking University, Beijing, China.
| | - Zhikun Zheng
- Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, China.
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, China.
- Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Jieyang, Guangdong, China.
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29
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Murphy JG, Raybin JG, Ansay GE, Sibener SJ. Spatiotemporal Mapping of Hole Nucleation and Growth during Block Copolymer Terracing with High-Speed Atomic Force Microscopy. ACS NANO 2023; 17:5644-5652. [PMID: 36912602 DOI: 10.1021/acsnano.2c11672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
As a platform for investigating two-dimensional phase separation, we track the structural evolution of block copolymer thin films during thermal annealing with environmentally controlled atomic force microscopy (AFM). Upon thermal annealing, block copolymer films with incommensurate thickness separate into a terraced morphology decorated with holes. With in situ imaging at 200 °C, we follow the continuous progression of terrace formation in a single region of a cylinder-forming poly(styrene-block-methyl methacrylate) thin film, beginning with the disordered morphology on an unpatterned silicon substrate and continuing through nucleation and coarsening stages. Topographic AFM imaging with nanoscale resolution simultaneously captures ensemble hole growth statistics while locally tracking polymer diffusion through measurements of the film thickness. At early times, we observe homogeneous hole nucleation and isotropic growth, with kinetics following the predictions of classical nucleation theory. At later times, however, we find anomalous hole growth which arises due to the combination of Ostwald ripening and coalescence mechanisms. In each case, our real-space observations highlight the importance of hole interactions for determining coarsening kinetics, mediated either through the interconnected phase for Ostwald ripening or through binary collision events for coalescence.
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Affiliation(s)
- Julia G Murphy
- Department of Chemistry and The James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
| | - Jonathan G Raybin
- Department of Chemistry and The James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
| | - Genevieve E Ansay
- Department of Chemistry and The James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
| | - Steven J Sibener
- Department of Chemistry and The James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
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30
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Cai ZF, Chen T, Wang D. Insights into the Polymerization Reactions on Solid Surfaces Provided by Scanning Tunneling Microscopy. J Phys Chem Lett 2023; 14:2463-2472. [PMID: 36867434 DOI: 10.1021/acs.jpclett.2c03943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Understanding the polymerization process at the molecular level is essential for the rational design and synthesis of polymers with controllable structures and properties. Scanning tunneling microscopy (STM) is one of the most important techniques to investigate the structures and reactions on conductive solid surfaces, and it has successfully been used to reveal the polymerization process on the surface at the molecular level in recent years. In this Perspective, after a brief introduction of on-surface polymerization reactions and STM, we focus on the applications of STM in the study of the processes and mechanism of on-surface polymerization, from one-dimensional to two-dimensional polymerization reactions. We conclude by a discussion of the challenges and perspectives on this topic.
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Affiliation(s)
- Zhen-Feng Cai
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Ting Chen
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Dong Wang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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31
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Hao W, Zhao Y, Miao L, Cheng G, Zhao G, Li J, Sang Y, Li J, Zhao C, He X, Sui C, Wang C. Multiple Impact-Resistant 2D Covalent Organic Framework. NANO LETTERS 2023; 23:1416-1423. [PMID: 36652343 DOI: 10.1021/acs.nanolett.2c04747] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Exploring and designing two-dimensional (2D) nanomaterials for armor-piercing protection has become a research focus. Here, by molecular dynamics simulation, we revealed that the ultralight monolayer covalent organic framework (COF), one kind of novel 2D crystalline polymer, possesses superior impact-resistant capability under high-velocity impact. The calculated specific penetration energy is much higher than that of other traditional impact-resistant materials, such as steel, poly(methyl methacrylate), Kevlar, etc. It was found that the hexagonal nanopores integrated by polymer chains have large deformation compatibility resulting from flexible torsion and stretching, which can remarkably contribute to the energy dissipation. In addition, the deformable nanopores can effectively restrain the crack propagation, enable COF to resist multiple impacts. This work uncovers the extreme dynamic responses of COF under high-velocity impact and provides theoretical guidance for designing superstrong 2D polymer-based crystalline nanomaterials.
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Affiliation(s)
- Weizhe Hao
- School of Astronautics, Harbin Institute of Technology, Harbin150001, China
| | - Yushun Zhao
- School of Astronautics, Harbin Institute of Technology, Harbin150001, China
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin150080, China
| | - Linlin Miao
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin150080, China
| | - Gong Cheng
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin150080, China
| | - Guoxin Zhao
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin150080, China
| | - Junjiao Li
- School of Astronautics, Harbin Institute of Technology, Harbin150001, China
| | - Yuna Sang
- School of Astronautics, Harbin Institute of Technology, Harbin150001, China
| | - Jiaxuan Li
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin150080, China
| | - Chenxi Zhao
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin150080, China
| | - Xiaodong He
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin150080, China
| | - Chao Sui
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin150080, China
| | - Chao Wang
- School of Astronautics, Harbin Institute of Technology, Harbin150001, China
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin150080, China
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32
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Lv G, Li X, Jensen E, Soman B, Tsao YH, Evans CM, Cahill DG. Dynamic Covalent Bonds in Vitrimers Enable 1.0 W/(m K) Intrinsic Thermal Conductivity. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- Guangxin Lv
- Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Xiaoru Li
- Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Elynn Jensen
- Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Bhaskar Soman
- Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Yu-Hsuan Tsao
- Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Christopher M. Evans
- Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - David G. Cahill
- Department of Materials Science and Engineering and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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33
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Venugopal A, Ruiz-Perez L, Swamynathan K, Kulkarni C, Calò A, Kumar M. Caught in Action: Visualizing Dynamic Nanostructures Within Supramolecular Systems Chemistry. Angew Chem Int Ed Engl 2023; 62:e202208681. [PMID: 36469792 DOI: 10.1002/anie.202208681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 11/30/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
Abstract
Supramolecular systems chemistry has been an area of active research to develop nanomaterials with life-like functions. Progress in systems chemistry relies on our ability to probe the nanostructure formation in solution. Often visualizing the dynamics of nanostructures which transform over time is a formidable challenge. This necessitates a paradigm shift from dry sample imaging towards solution-based techniques. We review the application of state-of-the-art techniques for real-time, in situ visualization of dynamic self-assembly processes. We present how solution-based techniques namely optical super-resolution microscopy, solution-state atomic force microscopy, liquid-phase transmission electron microscopy, molecular dynamics simulations and other emerging techniques are revolutionizing our understanding of active and adaptive nanomaterials with life-like functions. This Review provides the visualization toolbox and futuristic vision to tap the potential of dynamic nanomaterials.
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Affiliation(s)
- Akhil Venugopal
- Institute for Bioengineering of Catalonia (IBEC), Calle Baldiri Reixac 10-12, 08028, Barcelona, Spain
| | - Lorena Ruiz-Perez
- Institute for Bioengineering of Catalonia (IBEC), Calle Baldiri Reixac 10-12, 08028, Barcelona, Spain
| | - K Swamynathan
- Soft Condensed Matter, Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore-560080, India.,Department of Chemistry, NITTE Meenakshi Institute of Technology, Yelahanka, Bengaluru 560064, India
| | - Chidambar Kulkarni
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
| | - Annalisa Calò
- Institute for Bioengineering of Catalonia (IBEC), Calle Baldiri Reixac 10-12, 08028, Barcelona, Spain.,Department of Electronic and Biomedical Engineering, University of Barcelona, Calle Marti i Fraquès 1-11, 08028, Barcelona, Spain
| | - Mohit Kumar
- Institute for Bioengineering of Catalonia (IBEC), Calle Baldiri Reixac 10-12, 08028, Barcelona, Spain.,Department of Organic Chemistry, University of Barcelona, Calle Marti i Fraquès 1-11, 08028, Barcelona, Spain
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34
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Leidinger P, Panighel M, Pérez Dieste V, Villar-Garcia IJ, Vezzoni P, Haag F, Barth JV, Allegretti F, Günther S, Patera LL. Probing dynamic covalent chemistry in a 2D boroxine framework by in situ near-ambient pressure X-ray photoelectron spectroscopy. NANOSCALE 2023; 15:1068-1075. [PMID: 36541666 PMCID: PMC9851174 DOI: 10.1039/d2nr04949j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 11/30/2022] [Indexed: 06/08/2023]
Abstract
Dynamic covalent chemistry is a powerful approach to design covalent organic frameworks, where high crystallinity is achieved through reversible bond formation. Here, we exploit near-ambient pressure X-ray photoelectron spectroscopy to elucidate the reversible formation of a two-dimensional boroxine framework. By in situ mapping the pressure-temperature parameter space, we identify the regions where the rates of the condensation and hydrolysis reactions become dominant, being the key to enable the thermodynamically controlled growth of crystalline frameworks.
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Affiliation(s)
- Paul Leidinger
- Department of Chemistry and Catalysis Research Center, Technical University of Munich, 85748 Garching, Germany
| | | | | | | | - Pablo Vezzoni
- Physics Department E20, Technical University of Munich, 85748 Garching, Germany
| | - Felix Haag
- Physics Department E20, Technical University of Munich, 85748 Garching, Germany
| | - Johannes V Barth
- Physics Department E20, Technical University of Munich, 85748 Garching, Germany
| | | | - Sebastian Günther
- Department of Chemistry and Catalysis Research Center, Technical University of Munich, 85748 Garching, Germany
| | - Laerte L Patera
- Department of Chemistry and Catalysis Research Center, Technical University of Munich, 85748 Garching, Germany
- Institute of Physical Chemistry, University of Innsbruck, 6020 Innsbruck, Austria.
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35
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A self-standing three-dimensional covalent organic framework film. Nat Commun 2023; 14:220. [PMID: 36639394 PMCID: PMC9839775 DOI: 10.1038/s41467-023-35931-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 01/09/2023] [Indexed: 01/15/2023] Open
Abstract
Covalent crystals such as diamonds are a class of fascinating materials that are challenging to fabricate in the form of thin films. This is because spatial kinetic control of bond formation is required to create covalently bonded crystal films. Directional crystal growth is commonly achieved by chemical vapor deposition, an approach that is hampered by technical complexity and associated high cost. Here we report on a liquid-liquid interfacial approach based on physical-organic considerations to synthesize an ultrathin covalent crystal film. By distributing reactants into separate phases using hydrophobicity, the chemical reaction is confined to an interface that orients the crystal growth. A molecular-smooth interface combined with in-plane isotropic conditions enables the synthesis of films on a centimeter size scale with a uniform thickness of 13 nm. The film exhibits considerable mechanical robustness enabling a free-standing length of 37 µm, as well as a clearly anisotropic chemical structure and crystal lattice alignment.
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36
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Yu LH, Cai ZF, Verstraete L, Xia Y, Fang Y, Cuccia L, Ivasenko O, De Feyter S. Defect-engineered surfaces to investigate the formation of self-assembled molecular networks. Chem Sci 2022; 13:13212-13219. [PMID: 36425498 PMCID: PMC9667956 DOI: 10.1039/d2sc04599k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 10/24/2022] [Indexed: 08/28/2024] Open
Abstract
Herein we report the impact of covalent modification (grafting), inducing lateral nanoconfinement conditions, on the self-assembly of a quinonoid zwitterion derivative into self-assembled molecular networks at the liquid/solid interface. At low concentrations where the compound does not show self-assembly behaviour on bare highly oriented pyrolytic graphite (HOPG), close-packed self-assembled structures are visualized by scanning tunneling microscopy on covalently modified HOPG. The size of the self-assembled domains decreases with increasing the density of grafted molecules, i.e. the molecules covalently bound to the surface. The dynamics of domains are captured with molecular resolution, revealing not only time-dependent growth and shrinkage processes but also the orientation conversion of assembled domains. Grafted pins play a key role in initiating the formation of on-surface molecular self-assembly and their stabilization, providing an elegant route to study various aspects of nucleation and growth processes of self-assembled molecular networks.
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Affiliation(s)
- Li-Hua Yu
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F B-3001 Leuven Belgium
| | - Zhen-Feng Cai
- Department of Chemistry and Applied Biosciences, ETH Zurich Zurich CH-8093 Switzerland
| | - Lander Verstraete
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F B-3001 Leuven Belgium
- imec Kapeldreef 75 3001 Leuven Belgium
| | - Yuanzhi Xia
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F B-3001 Leuven Belgium
| | - Yuan Fang
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou 215123 PR China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University Suzhou 215123 Jiangsu PR China
| | - Louis Cuccia
- Department of Chemistry and Biochemistry, Concordia University 7141 Sherbrooke St. W. Montreal Québec Canada
| | - Oleksandr Ivasenko
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F B-3001 Leuven Belgium
- Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University Suzhou 215123 Jiangsu PR China
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University Suzhou 215123 PR China
| | - Steven De Feyter
- Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven Celestijnenlaan 200F B-3001 Leuven Belgium
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37
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Roys JS, O'Brien JM, Stucchi ND, Raj G, Hill AD, Ye J, Brown RD. Enhanced Crystallinity of Covalent Organic Frameworks Formed Under Physical Confinement by Exfoliated Graphene. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204152. [PMID: 36216741 DOI: 10.1002/smll.202204152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 09/19/2022] [Indexed: 06/16/2023]
Abstract
The polymerization of 1,4-benzenediboronic acid (BDBA) on mica to form a covalent organic framework (COF-1) reveals a dramatic increase in crystallinity when physically confined by exfoliated graphene. COF-1 domains formed under graphene confinement are highly geometric in shape and on the order of square micrometers in size, while outside of the exfoliated flakes, the COF-1 does not exhibit long-range mesoscale structural order, according to atomic force microscopy imaging. Micro-Fourier transform infrared spectroscopy confirms the presence of COF-1 both outside and underneath the exfoliated graphene flakes, and density functional theory calculations predict that higher mobility and self-assembly are not causes of this higher degree of crystallinity for the confined COF-1 domains. The most likely origin of the confined COF-1's substantial increase in crystallinity is from enhanced dynamic covalent crystallization due to the water confined beneath the graphene flake.
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Affiliation(s)
- Joshua S Roys
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY, 13699, USA
| | - Jennifer M O'Brien
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY, 13699, USA
| | - Nicholas D Stucchi
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY, 13699, USA
| | - Gaurav Raj
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY, 13699, USA
| | - Adam D Hill
- Department of Chemistry, St. Lawrence University, Canton, NY, 13617, USA
| | - Jingyun Ye
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY, 13699, USA
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA, 15282, USA
| | - Ryan D Brown
- Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY, 13699, USA
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38
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Xiao Y, Xu W. Single-molecule fluorescence imaging for probing nanocatalytic process. Chem 2022. [DOI: 10.1016/j.chempr.2022.09.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
Two-dimensional (2D) polymers have garnered widespread interest because of their intriguing physicochemical properties. Envisaged applications in fields including nanodevices, solid-state chemistry, physical organic chemistry, and condensed matter physics, however, demand high-quality and large-scale production. In this perspective, we first introduce exotic band structures of organic frameworks holding honeycomb, kagome, and Lieb lattices. We further discuss how mesoscale ordered 2D polymers can be synthesized by means of choosing suitable monomers and optimizing growth conditions. We describe successful polymerization strategies to introducing a non-benzenoid subunit into a π-conjugated carbon lattice via delicately designed monomer precursors. Also, to obviate transfer and restore the intrinsic properties of π-conjugated polymers, new paradigms of aryl-aryl coupling on inert surfaces are discussed. Recent achievements in the photopolymerization demonstrate the need for monomer design. We conclude the potential applications of these organic networks and project the future possibilities in providing new insights into on-surface polymerization.
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Affiliation(s)
- Tianchao Niu
- Beihang Hangzhou Innovation Institute Yuhang, Xixi Octagon City, Yuhang District, Hangzhou 310023, China
| | - Chenqiang Hua
- Beihang Hangzhou Innovation Institute Yuhang, Xixi Octagon City, Yuhang District, Hangzhou 310023, China
| | - Miao Zhou
- Beihang Hangzhou Innovation Institute Yuhang, Xixi Octagon City, Yuhang District, Hangzhou 310023, China
- School of Physics, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, China
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40
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Zhang Y, Li H, Geng Z, Zheng W, Quan Y, Cheng Y. Dynamically stable and amplified circularly polarized excimer emission regulated by solvation of chiral co-assembly process. Nat Commun 2022; 13:4905. [PMID: 35988006 PMCID: PMC9392786 DOI: 10.1038/s41467-022-32714-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 08/12/2022] [Indexed: 11/24/2022] Open
Abstract
Chiral supramolecular assembly has been assigned to be one of the most favorable strategies for the development of excellent circularly polarized luminescent (CPL)-active materials. Herein, we report our study of an achiral boron-containing pyrene (Py)-based chromophore (PyBO) as a circularly polarized excimer emission (CPEE) dye induced by chiral co-assemblies containing chiral binaphthyl-based enantiomers (R/S-M). Chiral co-assembly R/S-M-(PyBO)4 fresh film spin-coated from toluene solution can exhibit orderly nanofibers and strong green CPEE (λem = 512 nm, gem = ±0.45, ΦFL = 51.2 %) resulting from an achiral PyBO excimer. In contrast, only a very weak blue CPL was observed (λem = 461 nm, gem = ± 0.0125, ΦFL = 19.0 %) after 187 h due to PyBO monomer emission as spherulite growth. Interestingly, this kind of chiral co-assembly R-M-(PyBO)4-T film from tetrahydrofuran (THF) solution retains uniform morphology and affords the most stable and strongest CPEE performance (λem = 512 nm, gem = + 0.62, ΦFL = 53.3 %) after 10 days.
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Affiliation(s)
- Yuxia Zhang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Hang Li
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Zhongxing Geng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Wenhua Zheng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
| | - Yiwu Quan
- Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
| | - Yixiang Cheng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
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41
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Zhang Y, Lu J, Li B, Chen W, Xiong W, Ruan Z, Zhang H, Sun S, Chen L, Gao L, Cai J. On-surface synthesis and characterization of nitrogen-doped covalent-organic frameworks on Ag(111) substrate. J Chem Phys 2022; 157:031103. [DOI: 10.1063/5.0099995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Atomically precise fabrication of covalent-organic frameworks with well-defined heteroatom-dopant sites and further understanding of their electronic properties at the atomic level remain a challenge. Herein, we demonstrate the bottom-up synthesis of well-organized covalent-organic frameworks doped by nitrogen atoms on an Ag(111) substrate. Using high-resolution scanning tunneling microscopy and non-contact atomic force microscopy, the atomic structures of the intermediate metal–organic frameworks and the final covalent-organic frameworks are clearly identified. Scanning tunneling spectroscopy characterization reveals that the electronic bandgap of the as-formed N-doped covalent-organic framework is 2.45 eV, in qualitative agreement with the theoretical calculations. The calculated band structure together with the projected density of states analysis clearly unveils that the incorporation of nitrogen atoms into the covalent-organic framework backbone will remarkably tune the bandgap owing to the fact that the foreign nitrogen atom has one more electron than the carbon atom. Such covalent-organic frameworks may offer an atomic-scale understanding of the local electronic structure of heteroatom-doped covalent-organic frameworks and hold great promise for all relevant wide bandgap semiconductor technologies, for example, electronics, photonics, high-power and high-frequency devices, and solar energy conversion.
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Affiliation(s)
- Yong Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Jianchen Lu
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Baijin Li
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Weiben Chen
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Wei Xiong
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Zilin Ruan
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Hui Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Shijie Sun
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Long Chen
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Lei Gao
- Faculty of Science, Kunming University of Science and Technology, No. 727 Jingming South Road, Kunming 650500, China
| | - Jinming Cai
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
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42
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Jing Y, Zhu X, Maier S, Heine T. 2D conjugated polymers: exploiting topological properties for the rational design of metal-free photocatalysts. TRENDS IN CHEMISTRY 2022. [DOI: 10.1016/j.trechm.2022.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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