1
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Levina EO, Tsirelson VG. DFT potentials from a chemical perspective: Anatomy of electron (de)localization in molecules and crystals. J Comput Chem 2023. [PMID: 37183763 DOI: 10.1002/jcc.27131] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/26/2023] [Accepted: 04/28/2023] [Indexed: 05/16/2023]
Abstract
We introduce a fermionic potential, v f $$ {v}_f $$ , as a comprehensive measure of electron (de)localization in atomic-molecular systems. Unlike other common descriptors as ELF, LOL, etc., it characterizes all physical effects responsible for (de)localization of electrons, namely: an exchange hole depth, its tendency to change, a sensitivity of an exchange correlation hidden in a pair density and kinetic potential to local variations in electron density. Wells in the v f $$ {v}_f $$ distribution correspond to the domains of maximum electron localization, while the potential's barriers prevent delocalization of electrons through them. It also estimates bond orders and successfully reveals the impact of chemical modifications or environmental effects on the delocalization of electrons in molecules and crystals. The v f $$ {v}_f $$ components provide a unique opportunity to compare the influence of the mentioned physical effects on electron (de)localization. This merges physical and chemical views of electron delocalization using functions appearing in density functional theory.
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Affiliation(s)
- Elena O Levina
- N.S. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow, Russia
| | - Vladimir G Tsirelson
- D.I. Mendeleev University of Chemical Technology, Moscow, Russia
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Moscow, Russia
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2
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Kohn J, Bursch M, Hansen A, Grimme S. Computational study of ground-state properties of μ 2 -bridged group 14 porphyrinic sandwich complexes. J Comput Chem 2023; 44:229-239. [PMID: 35470911 DOI: 10.1002/jcc.26870] [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: 02/22/2022] [Revised: 03/29/2022] [Accepted: 04/08/2022] [Indexed: 12/31/2022]
Abstract
The structural properties of μ2 -bridged porphyrinic double-decker complexes are investigated and the influence of various ligands, metals, substituents, and bridging atoms on the dominant structural motif is elucidated. A variety of quantum chemical methods including semiempirical (SQM) methods and density functional theory (DFT) is assessed for the calculation of ecliptic and staggered conformational energies. Local coupled cluster (DLPNO-CCSD(T1)) data are generated for reference. The r2 SCAN-3c composite scheme as well as the B2PLYP-D4/def2-QZVPP approach are identified as reliable methods. Energy decomposition analyses (EDA) and localized molecular orbital analyses (LMO) are used to investigate the bonding situation and the nature of the inter-ligand interaction energy underlining the crucial role of attractive London dispersion interactions. Targeted modification of the bridging atom, e.g., by replacing O2- by S2- is shown to drastically change the major structural features of the investigated complexes. Further, the influence of different substituents of varying size at the phthalocyanine ligand regarding the dominant conformation is described.
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Affiliation(s)
- Julia Kohn
- Mulliken Center for Theoretical Chemistry, University of Bonn, Bonn, Germany
| | - Markus Bursch
- Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany
| | - Andreas Hansen
- Mulliken Center for Theoretical Chemistry, University of Bonn, Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, University of Bonn, Bonn, Germany
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3
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Fu S, Jin E, Hanayama H, Zheng W, Zhang H, Di Virgilio L, Addicoat MA, Mezger M, Narita A, Bonn M, Müllen K, Wang HI. Outstanding Charge Mobility by Band Transport in Two-Dimensional Semiconducting Covalent Organic Frameworks. J Am Chem Soc 2022; 144:7489-7496. [PMID: 35420808 PMCID: PMC9052747 DOI: 10.1021/jacs.2c02408] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
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Two-dimensional covalent
organic frameworks (2D COFs) represent
a family of crystalline porous polymers with a long-range order and
well-defined open nanochannels that hold great promise for electronics,
catalysis, sensing, and energy storage. To date, the development of
highly conductive 2D COFs has remained challenging due to the finite
π-conjugation along the 2D lattice and charge localization at
grain boundaries. Furthermore, the charge transport mechanism within
the crystalline framework remains elusive. Here, time- and frequency-resolved
terahertz spectroscopy reveals intrinsically Drude-type band transport
of charge carriers in semiconducting 2D COF thin films condensed by
1,3,5-tris(4-aminophenyl)benzene (TPB) and 1,3,5-triformylbenzene
(TFB). The TPB–TFB COF thin films demonstrate high photoconductivity
with a long charge scattering time exceeding 70 fs at room temperature
which resembles crystalline inorganic materials. This corresponds
to a record charge carrier mobility of 165 ± 10 cm2 V–1 s–1, vastly outperforming
that of the state-of-the-art conductive COFs. These results reveal
TPB–TFB COF thin films as promising candidates for organic
electronics and catalysis and provide insights into the rational design
of highly crystalline porous materials for efficient and long-range
charge transport.
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Affiliation(s)
- Shuai Fu
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz D-55128, Germany
| | - Enquan Jin
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz D-55128, Germany.,State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry and International Center of Future Science, Jilin University, Changchun 130012, P.R. China
| | - Hiroki Hanayama
- Organic and Carbon Nanomaterials Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa 904-0495, Japan
| | - Wenhao Zheng
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz D-55128, Germany
| | - Heng Zhang
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz D-55128, Germany
| | - Lucia Di Virgilio
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz D-55128, Germany
| | - Matthew A Addicoat
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, U.K
| | - Markus Mezger
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz D-55128, Germany
| | - Akimitsu Narita
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz D-55128, Germany.,Organic and Carbon Nanomaterials Unit, Okinawa Institute of Science and Technology Graduate University, Okinawa 904-0495, Japan
| | - Mischa Bonn
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz D-55128, Germany
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz D-55128, Germany.,Institute of Physical Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, Mainz 55128, Germany
| | - Hai I Wang
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz D-55128, Germany
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4
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Giannini S, Blumberger J. Charge Transport in Organic Semiconductors: The Perspective from Nonadiabatic Molecular Dynamics. Acc Chem Res 2022; 55:819-830. [PMID: 35196456 PMCID: PMC8928466 DOI: 10.1021/acs.accounts.1c00675] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
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Organic semiconductors (OSs) are an exciting
class of materials
that have enabled disruptive technologies in this century including
large-area electronics, flexible displays, and inexpensive solar cells.
All of these technologies rely on the motion of electrical charges
within the material and the diffusivity of these charges critically
determines their performance. In this respect, it is remarkable that
the nature of the charge transport in these materials has puzzled
the community for so many years, even for apparently simple systems
such as molecular single crystals: some experiments would better fit
an interpretation in terms of a localized particle picture, akin to
molecular or biological electron transfer, while others are in better
agreement with a wave-like interpretation, more akin to band transport
in metals. Exciting recent progress in the theory and simulation
of charge
carrier transport in OSs has now led to a unified understanding of
these disparate findings, and this Account will review one of these
tools developed in our laboratory in some detail: direct charge carrier
propagation by quantum-classical nonadiabatic molecular dynamics.
One finds that even in defect-free crystals the charge carrier can
either localize on a single molecule or substantially delocalize over
a large number of molecules depending on the relative strength of
electronic couplings between the molecules, reorganization, or charge
trapping energy of the molecule and thermal fluctuations of electronic
couplings and site energies, also known as electron–phonon
couplings. Our simulations predict that in molecular OSs exhibiting
some of
the highest measured charge mobilities to date, the charge carrier
forms “flickering” polarons, objects that are delocalized
over 10–20 molecules on average and that constantly change
their shape and extension under the influence of thermal disorder.
The flickering polarons propagate through the OS by short (≈10
fs long) bursts of the wave function that lead to an expansion of
the polaron to about twice its size, resulting in spatial displacement,
carrier diffusion, charge mobility, and electrical conductivity. Arguably
best termed “transient delocalization”, this mechanistic
scenario is very similar to the one assumed in transient localization
theory and supports its assertions. We also review recent applications
of our methodology to charge transport in disordered and nanocrystalline
samples, which allows us to understand the influence of defects and
grain boundaries on the charge propagation. Unfortunately, the
energetically favorable packing structures of
typical OSs, whether molecular or polymeric, places fundamental constraints
on charge mobilities/electronic conductivity compared to inorganic
semiconductors, which limits their range of applications. In this
Account, we review the design rules that could pave the way for new
very high-mobility OS materials and we argue that 2D covalent organic
frameworks are one of the most promising candidates to satisfy them. We conclude that our nonadiabatic dynamics method is a powerful
approach for predicting charge carrier transport in crystalline and
disordered materials. We close with a brief outlook on extensions
of the method to exciton transport, dissociation, and recombination.
This will bring us a step closer to an understanding of the birth,
survival, and annihiliation of charges at interfaces of optoelectronic
devices.
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Affiliation(s)
- Samuele Giannini
- Department of Physics and Astronomy and Thomas Young Centre, University College London, London WC1E 6BT, United Kingdom
| | - Jochen Blumberger
- Department of Physics and Astronomy and Thomas Young Centre, University College London, London WC1E 6BT, United Kingdom
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5
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Li X, Nomura K, Guedes A, Goto T, Sekino T, Fujitsuka M, Osakada Y. Enhanced Photocatalytic Activity of Porphyrin Nanodisks Prepared by Exfoliation of Metalloporphyrin-Based Covalent Organic Frameworks. ACS OMEGA 2022; 7:7172-7178. [PMID: 35252707 PMCID: PMC8892472 DOI: 10.1021/acsomega.1c06838] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 01/31/2022] [Indexed: 05/27/2023]
Abstract
Organic polymers derived from covalent organic frameworks (COFs) have various applications, including photocatalysis. The synthesis of organic polymer materials from COFs to obtain higher activity for photocatalysis by changing the unit molecule has been investigated. The choice of the unit molecule is important to characterize the photochemical properties. Among various such unit molecules, porphyrins have attracted much attention as organic chromophores commonly used in photocatalytic reactions with COFs. Although COFs with various organic chromophores have been synthesized and attempts have been made to improve their photocatalytic activity, enhancing the photocatalytic activity by adjusting the layer thickness through exfoliation of COFs has yet to be fully studied. In the present study, the exfoliation of metalloporphyrin-based COFs with pyridine as the axial ligand and adjustment of the layer thickness were found to enhance the photocatalytic activity. Hydrogen generation and 3,3',5,5'-tetramethylbenzidine oxidation reactions were investigated as representative photocatalytic reactions, with the photocatalytic activity up to 7 times that of the original free-base porphyrin COFs. These results indicate that the different thicknesses synthesized by exfoliating COFs increased the photocatalytic effect of polymers.
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Affiliation(s)
- Xinxi Li
- SANKEN
(The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Kota Nomura
- SANKEN
(The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Arnaud Guedes
- SANKEN
(The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Tomoyo Goto
- SANKEN
(The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
- Institute
for Advanced Co-Creation Studies, Osaka
University, 1-1 Yamadagaoka, Suita, Osaka 565-0871, Japan
| | - Tohru Sekino
- SANKEN
(The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Mamoru Fujitsuka
- SANKEN
(The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Yasuko Osakada
- SANKEN
(The Institute of Scientific and Industrial Research), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
- Institute
for Advanced Co-Creation Studies, Osaka
University, 1-1 Yamadagaoka, Suita, Osaka 565-0871, Japan
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6
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Jing J, Chen W, Huang Z, Huang L, Liang X, He Y, Li H. Electronic structure evolution induced by the charge redistribution during the construction of two-dimensional polymer networks from monomers to crystal frameworks. Phys Chem Chem Phys 2022; 24:28003-28011. [DOI: 10.1039/d2cp04196k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The electronic structure of COFs is dominated by the relative energy level between the frontier orbitals of building units, and the charge carrier mobility within the 2D structure is dominated by the charge transfer between core and linker units.
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Affiliation(s)
- Jian Jing
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials, Qingdao University of Science & Technology, Qingdao, Shandong 266061, China
| | - Weikun Chen
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials, Qingdao University of Science & Technology, Qingdao, Shandong 266061, China
| | - Zehua Huang
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials, Qingdao University of Science & Technology, Qingdao, Shandong 266061, China
| | - Luyan Huang
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials, Qingdao University of Science & Technology, Qingdao, Shandong 266061, China
| | - Xuefeng Liang
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials, Qingdao University of Science & Technology, Qingdao, Shandong 266061, China
| | - Yan He
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials, Qingdao University of Science & Technology, Qingdao, Shandong 266061, China
| | - Huifang Li
- College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials, Qingdao University of Science & Technology, Qingdao, Shandong 266061, China
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7
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Zheng W, Li A, Wang X, Li Z, Zhao B, Wang L, Kan W, Sun L, Qi X. Construction of hydrophilic covalent organic frameworks and their fast and efficient adsorption of cationic dyes from aqueous solution. NEW J CHEM 2022. [DOI: 10.1039/d2nj04336j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
TFPB-Pa-SO3H COF and TFPB-BDSA COF were synthesized and showed fast adsorption of MLB (1 and 2 min) and high adsorption uptakes of CV (1559 and 1288 mg g−1). TFPB-Pa-SO3H COF as adsorbing material was used for the removal of dye molecules in real water samples.
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Affiliation(s)
- Wang Zheng
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar, 161006, China
| | - Anran Li
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar, 161006, China
| | - Xiuwen Wang
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar, 161006, China
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar, 161006, China
| | - Zhigang Li
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar, 161006, China
| | - Bing Zhao
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar, 161006, China
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar, 161006, China
| | - Liyan Wang
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar, 161006, China
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar, 161006, China
| | - Wei Kan
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar, 161006, China
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar, 161006, China
| | - Li Sun
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar, 161006, China
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar, 161006, China
| | - Xin Qi
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar, 161006, China
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8
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Li L, Li A, Zhao B, Kan W, Bi C, Zheng W, Wang X, Sun L, Wang L, Zhang H. Multi-sulfonated functionalized hydrophilic covalent organic framework for highly efficient dye removal from real samples. NEW J CHEM 2022. [DOI: 10.1039/d2nj02857c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A hydrophilic covalent organic framework (BTA-BDSA-COF) was successfully erected by introducing multi-sulfonated groups into a covalent framework structure and it can be easily applied to capture the cationic dye in real water samples.
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Affiliation(s)
- Lantian Li
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar 161006, China
| | - Anran Li
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar 161006, China
| | - Bing Zhao
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar 161006, China
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar 161006, China
| | - Wei Kan
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar 161006, China
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar 161006, China
| | - Chunyu Bi
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar 161006, China
| | - Wang Zheng
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar 161006, China
| | - Xiuwen Wang
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar 161006, China
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar 161006, China
| | - Li Sun
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar 161006, China
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar 161006, China
| | - Liyan Wang
- Chemistry and Chemical Engineering Institute, Qiqihar University, Qiqihar 161006, China
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, Qiqihar 161006, China
| | - Hongrui Zhang
- Qiqihar Inspection and Testing Center, Qiqihar 161006, China
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9
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Frimpong J, Liu ZF. Quasiparticle electronic structure of two-dimensional heterotriangulene-based covalent organic frameworks adsorbed on Au(111). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:254004. [PMID: 33848999 DOI: 10.1088/1361-648x/abf7a0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 04/13/2021] [Indexed: 06/12/2023]
Abstract
The modular nature and unique electronic properties of two-dimensional (2D) covalent organic frameworks (COFs) make them an attractive option for applications in catalysis, optoelectronics, and spintronics. The fabrications of such devices often involve interfaces formed between COFs and substrates. In this work, we employ the first-principlesGWapproach to accurately determine the quasiparticle electronic structure of three 2D carbonyl bridged heterotriangulene-based COFs featuring honeycomb-kagome lattice, with their properties ranging from a semi-metal to a wide-gap semiconductor. Moreover, we study the adsorption of these COFs on Au(111) surface and characterize the quasiparticle electronic structure at the heterogeneous COF/Au(111) interfaces. To reduce the computational cost, we apply the recently developed dielectric embeddingGWapproach and show that our results agree with existing experimental measurement on the interfacial energy level alignment. Our calculations illustrate how the many-body dielectric screening at the interface modulates the energies and shapes of the Dirac bands, the effective masses of semiconducting COFs, as well as the Fermi velocity of the semi-metallic COF.
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Affiliation(s)
- Joseph Frimpong
- Department of Chemistry, Wayne State University, Detroit, MI 48202, United States of America
| | - Zhen-Fei Liu
- Department of Chemistry, Wayne State University, Detroit, MI 48202, United States of America
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10
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Affiliation(s)
- Xiaoyang Zhu
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - David R Reichman
- Department of Chemistry, Columbia University, New York, New York 10027, USA
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11
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Raptakis A, Dianat A, Croy A, Cuniberti G. Predicting the bulk modulus of single-layer covalent organic frameworks with square-lattice topology from molecular building-block properties. NANOSCALE 2021; 13:1077-1085. [PMID: 33393581 DOI: 10.1039/d0nr07666j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Two-dimensional Covalent Organic Frameworks (2D COFs) have attracted a lot of interest because of their potential for a broad range of applications. Different combinations of their molecular building blocks can lead to new materials with different physical and chemical properties. In this study, the elasticity of different single-layer tetrabenzoporphyrin (H2-TBPor) and phthalocyanine (H2-Pc) based 2D COFs is numerically investigated using a density-functional based tight-binding approach. Specifically, we calculate the 2D bulk modulus and the equivalent spring constants of the respective molecular building-blocks. Using a spring network model we are able to predict the 2D bulk modulus based on the properties of the isolated molecules. This provides a path to optimize elastic properties of 2D COFs.
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Affiliation(s)
- Antonios Raptakis
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany. and Max Planck Institute for the Physics of Complex Systems, 01187 Dresden, Germany
| | - Arezoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany.
| | - Alexander Croy
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany.
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany. and Dresden Center for Computational Materials Science (DCMS), TU Dresden, 01062 Dresden, Germany
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