1
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Escorihuela E, Del Barrio J, Davidson RJ, Beeby A, Low PJ, Prez-Murano F, Cea P, Martin S. Large area arrays of discrete single-molecule junctions derived from host-guest complexes. NANOSCALE 2024; 16:1238-1246. [PMID: 38116590 DOI: 10.1039/d3nr05122f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
The desire to continually reduce the lower limits of semiconductor integrated circuit (IC) fabrication methods continues to inspire interest in unimolecular electronics as a platform technology for the realization of future (opto)electronic devices. However, despite successes in developing methods for the construction and measurement of single-molecule and large-area molecular junctions, exercising control over the precise junction geometry remains a significant challenge. Here, host-guest complexes of the wire-like viologen derivative 1,1'-bis(4-(methylthio)-phenyl)-[4,4'-bipyridine]-1,1'-diium chloride ([1][Cl]2) and cucurbit[7]uril (CB[7]) have been self-assembled in a regular pattern over a gold substrate. Subsequently, ligandless gold nanoparticles (AuNPs) synthesized in situ are deposited over the host-guest array. The agreement between the conductance of individual mono-molecular junctions, appropriately chosen as a function of the AuNP diameter, within this array determined by conductive probe atomic force microscope (c-AFM) and true single-molecule measurements for a closely similar host-guest complex within a scanning tunneling microscope break-junction (STM-BJ) indicates the formation of molecular junctions derived from these host-guest complexes without deleterious intermolecular coupling effects.
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Affiliation(s)
- Enrique Escorihuela
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain.
- Departamento de Química Física, Universidad de Zaragoza, 50009, Zaragoza, Spain
| | - Jesús Del Barrio
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain.
- Departamento de Química Orgánica, Universidad de Zaragoza, 50009, Zaragoza, Spain
| | - Ross J Davidson
- Department of Chemistry, Durham University, South Rd, Durham, DH1 3LE, UK
| | - Andrew Beeby
- Department of Chemistry, Durham University, South Rd, Durham, DH1 3LE, UK
| | - Paul J Low
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, 6009, Western Australia, Australia
| | - Francesc Prez-Murano
- Institute of Microelectronics of Barcelona (IMB-CNM, CSIC), 08193, Bellaterra, Spain
| | - Pilar Cea
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain.
- Departamento de Química Física, Universidad de Zaragoza, 50009, Zaragoza, Spain
- Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, 50018, Zaragoza, Spain
| | - Santiago Martin
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009, Zaragoza, Spain.
- Departamento de Química Física, Universidad de Zaragoza, 50009, Zaragoza, Spain
- Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, 50018, Zaragoza, Spain
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2
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Gorenskaia E, Potter J, Korb M, Lambert C, Low PJ. Exploring relationships between chemical structure and molecular conductance: from α,ω-functionalised oligoynes to molecular circuits. NANOSCALE 2023. [PMID: 37070423 DOI: 10.1039/d3nr01034a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
The quantum circuit rule (QCR) allows estimation of the conductance of molecular junctions, electrode|X-bridge-Y|electrode, by considering the molecule as a series of independent scattering regions associated with the anchor groups (X, Y) and bridge, provided the numerical parameters that characterise the anchor groups (aX, aY) and molecular backbones (bB) are known. Single-molecule conductance measurements made with a series of α,ω-substituted oligoynes (X-{(CC)N}-X, N = 1, 2, 3, 4), functionalised by terminal groups, X (4-thioanisole (C6H4SMe), 5-(3,3-dimethyl-2,3-dihydrobenzo[b]thiophene) (DMBT), 4-aniline (C6H4NH2), 4-pyridine (Py), capable of serving as 'anchor groups' to contact the oligoyne fragment within a molecular junction, have shown the expected exponential dependence of molecular conductance, G, with the number of alkyne repeating units. In turn, this allows estimation of the anchor (ai) and backbone (bi) parameters. Using these values, together with previously determined parameters for other molecular fragments, the QCR is found to accurately estimate the junction conductance of more complex molecular circuits formed from smaller components assembled in series.
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Affiliation(s)
- Elena Gorenskaia
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6026, Australia.
| | - Jarred Potter
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6026, Australia.
| | - Marcus Korb
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6026, Australia.
| | - Colin Lambert
- Department of Physics, University of Lancaster, Lancaster LA1 4YB, England, UK.
| | - Paul J Low
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6026, Australia.
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3
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Mang A, Rotthowe N, Beltako K, Linseis M, Pauly F, Winter RF. Single-molecule conductance studies on quasi- and metallaaromatic dibenzoylmethane coordination compounds and their aromatic analogs. NANOSCALE 2023; 15:5305-5316. [PMID: 36811332 DOI: 10.1039/d2nr05670d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The ability to predict the conductive behaviour of molecules, connected to macroscopic electrodes, represents a crucial prerequisite for the design of nanoscale electronic devices. In this work, we investigate whether the notion of a negative relation between conductance and aromaticity (the so-called NRCA rule) also pertains to quasi-aromatic and metallaaromatic chelates derived from dibenzoylmethane (DBM) and Lewis acids (LAs) that either do or do not contribute two extra dπ electrons to the central resonance-stabilised β-ketoenolate binding pocket. We therefore synthesised a family of methylthio-functionalised DBM coordination compounds and subjected them, along with their truly aromatic terphenyl and 4,6-diphenylpyrimidine congeners, to scanning tunneling microscope break-junction (STM-BJ) experiments on gold nanoelectrodes. All molecules share the common motif of three π-conjugated, six-membered, planar rings with a meta-configuration at the central ring. According to our results, their molecular conductances fall within a factor of ca. 9 in an ordering aromatic < metallaaromatic < quasi-aromatic. The experimental trends are rationalised by quantum transport calculations based on density functional theory (DFT).
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Affiliation(s)
- André Mang
- Chemistry Department, University of Konstanz, 78457 Konstanz, Germany.
| | - Nils Rotthowe
- Chemistry Department, University of Konstanz, 78457 Konstanz, Germany.
| | - Katawoura Beltako
- Physics Department, University of Lomé, 1515 Lomé, Togo
- Institute of Physics, University of Augsburg, 86159 Augsburg, Germany.
| | - Michael Linseis
- Chemistry Department, University of Konstanz, 78457 Konstanz, Germany.
| | - Fabian Pauly
- Institute of Physics, University of Augsburg, 86159 Augsburg, Germany.
| | - Rainer F Winter
- Chemistry Department, University of Konstanz, 78457 Konstanz, Germany.
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4
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Li R, Zhou Y, Ge W, Zheng J, Zhu Y, Bai J, Li X, Lin L, Duan H, Shi J, Yang Y, Liu J, Liu Z, Hong W. Strain of Supramolecular Interactions in Single‐Stacking Junctions. Angew Chem Int Ed Engl 2022; 61:e202200191. [DOI: 10.1002/anie.202200191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Ruihao Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Yu Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Wenhui Ge
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Jueting Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Yixuan Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Jie Bai
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Xiaohui Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Luchun Lin
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Huicong Duan
- Institute of Artificial Intelligence Xiamen University Xiamen 361005 China
| | - Jia Shi
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
- Institute of Artificial Intelligence Xiamen University Xiamen 361005 China
| | - Yang Yang
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
- Institute of Artificial Intelligence Xiamen University Xiamen 361005 China
| | - Junyang Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
- Institute of Artificial Intelligence Xiamen University Xiamen 361005 China
| | - Zitong Liu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC) College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China
| | - Wenjing Hong
- State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
- Institute of Artificial Intelligence Xiamen University Xiamen 361005 China
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5
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Zou Q, Chen X, Zhou Y, Jin X, Zhang Z, Qiu J, Wang R, Hong W, Su J, Qu DH, Tian H. Photoconductance from the Bent-to-Planar Photocycle between Ground and Excited States in Single-Molecule Junctions. J Am Chem Soc 2022; 144:10042-10052. [PMID: 35611861 DOI: 10.1021/jacs.2c03671] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Single-molecule conductance measurements for 9,14-diphenyl-9,14-dihydrodibenzo[a,c]phenazine (DPAC) may offer unique insight into the bent-to-planar photocycle between the ground and excited states. Herein, we employ DPAC derivative DPAC-SMe as the molecular prototype to fabricate single-molecule junctions using the scanning tunneling microscope break junction technique and explore photoconductance dependence on the excited-state structural/electronic changes. We find up to ∼200% conductance enhancement of DPAC-SMe under continuous 340 nm light irradiation than that without irradiation, while photoconductance disappears in the case where structural evolution of the DPAC-SMe is halted through macrocyclization. The in situ conductance modulation as pulsed 340 nm light irradiation is monitored in the DPAC-SMe-based junctions alone, suggesting that the photoconductance of DPAC-SMe stems from photoinduced intramolecular planarization. Theoretical calculations reveal that the photoinduced structural evolution brings about a significant redistribution of the electron cloud density, which leads to the appearance of Fano resonance, resulting in enhanced conductance through the DPAC-SMe-fabricated junctions. This work provides evidence of bent-to-planar photocycle-induced conductance differences at the single-molecule level, offering a tailored approach for tuning the charge transport characteristics of organic photoelectronic devices.
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Affiliation(s)
- Qi Zou
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xuanying Chen
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yu Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xin Jin
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Zhiyun Zhang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jin Qiu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Rui Wang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Wenjing Hong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jianhua Su
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Da-Hui Qu
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - He Tian
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
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6
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Using automated synthesis to understand the role of side chains on molecular charge transport. Nat Commun 2022; 13:2102. [PMID: 35440635 PMCID: PMC9019014 DOI: 10.1038/s41467-022-29796-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 03/22/2022] [Indexed: 11/21/2022] Open
Abstract
The development of next-generation organic electronic materials critically relies on understanding structure-function relationships in conjugated polymers. However, unlocking the full potential of organic materials requires access to their vast chemical space while efficiently managing the large synthetic workload to survey new materials. In this work, we use automated synthesis to prepare a library of conjugated oligomers with systematically varied side chain composition followed by single-molecule characterization of charge transport. Our results show that molecular junctions with long alkyl side chains exhibit a concentration-dependent bimodal conductance with an unexpectedly high conductance state that arises due to surface adsorption and backbone planarization, which is supported by a series of control experiments using asymmetric, planarized, and sterically hindered molecules. Density functional theory simulations and experiments using different anchors and alkoxy side chains highlight the role of side chain chemistry on charge transport. Overall, this work opens new avenues for using automated synthesis for the development and understanding of organic electronic materials. Development of organic electronic materials relies on understanding structure-function relationships in conjugated polymers but the synthetic workload to make large numbers of new compounds presents a practical barrier to properly survey conjugated organic derivatives. Here, the authors use automated synthesis to prepare a library of conjugated oligomers with systematically varied side chain composition followed by single-molecule characterization of charge transport.
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7
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Li R, Zhou Y, Ge W, Zheng J, Zhu Y, Bai J, Li X, Lin L, Duan H, Shi J, Yang Y, Liu J, Liu Z, Hong W. Strain of supramolecular interactions in single‐stacking junctions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ruihao Li
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Yu Zhou
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Wenhui Ge
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Jueting Zheng
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Yixuan Zhu
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Jie Bai
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Xiaohui Li
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Luchun Lin
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Huicong Duan
- Xiamen University Institute of Artifical Intelligence CHINA
| | - Jia Shi
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Yang Yang
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Junyang Liu
- Xiamen University College of Chemistry and Chemical Engineering CHINA
| | - Zitong Liu
- Lanzhou University College of Chemistry and Chemical Engineering CHINA
| | - Wenjing Hong
- Xiamen University College of Chemistry and Chemical Engineering Siming south road 422 3012 Xiamen CHINA
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8
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Abstract
Single-molecule junctions - devices fabricated by electrically connecting a single molecule to two electrodes - can respond to a variety of stimuli, that include electrostatic/electrochemical gating, light, other chemical species, and mechanical forces. When the latter is used, the device becomes mechanoresistive which means that its electrical resistance/conductance changes upon application of a mechanical stress. The mechanoresistive phenomenon can arise at the metal-molecule interface or it can be embedded in the molecular backbone, and several strategies to attain high reproducibility, high sensitivity and reversible behaviour have been developed over the years. These devices offer a unique insight on the process of charge transfer/transport at the metal/molecule interface, and have potential for applications as nanoelectromechanical systems, integrating electrical and mechanical functionality at the nanoscale. In this review, the status of the field is presented, with a focus on those systems that proved to have reversible behaviour, along with a discussion on the techniques used to fabricate and characterise mechanoresistive devices.
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Affiliation(s)
- Andrea Vezzoli
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK.
- Stephenson Institute for Renewable Energy, University of Liverpool, Peach Streat, Liverpool L69 7ZF, UK
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9
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Qu K, Duan P, Wang JY, Zhang B, Zhang QC, Hong W, Chen ZN. Capturing the Rotation of One Molecular Crank by Single-Molecule Conductance. NANO LETTERS 2021; 21:9729-9735. [PMID: 34761680 DOI: 10.1021/acs.nanolett.1c03626] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Unveiling the internal dynamics of rotation in molecular machine at single-molecule scale is still a challenge. In this work, three crank-shaped molecules are elaborately designed with the conformational flipping between syn and anti fulfilled by two naphthyl groups rotating freely along 1,3-butadiynyl axis. By investigating the single-molecule conductance using scanning tunnelling microscope break junction (STM-BJ) technique and theoretical simulation, the internal rotation of these crank-shaped molecules is well identified through low and high conductance corresponding to syn- and anti-conformations. As demonstrated by theoretically computational study, the orbital energy changes with the conformational flipping and influences the intraorbital quantum interference, thus eventually modulating the single-molecule conductance. This work demonstrates single-molecule conductance measurement to be a rational approach for characterizing the internal rotation of molecular machines.
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Affiliation(s)
- Kai Qu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou, Fujian 350002, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ping Duan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, NEL, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Jin-Yun Wang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou, Fujian 350002, China
| | - Bochao Zhang
- Department of Pharmacy, Xiamen Medical College, Xiamen 361005, China
| | - Qian-Chong Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou, Fujian 350002, China
- Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Wenjing Hong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, NEL, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Zhong-Ning Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou, Fujian 350002, China
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10
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Li S, Yu H, Li J, Angello N, Jira ER, Li B, Burke MD, Moore JS, Schroeder CM. Transition between Nonresonant and Resonant Charge Transport in Molecular Junctions. NANO LETTERS 2021; 21:8340-8347. [PMID: 34529446 DOI: 10.1021/acs.nanolett.1c02915] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Efficient long-range charge transport is required for high-performance molecular electronic devices. Resonant transport is thought to occur in single molecule junctions when molecular frontier orbital energy levels align with electrode Fermi levels, thereby enabling efficient transport without molecular or environmental relaxation. Despite recent progress, we lack a systematic understanding of the transition between nonresonant and resonant transport for molecular junctions with different chemical compositions. In this work, we show that molecular junctions undergo a reversible transition from nonresonant tunneling to resonant transport as a function of applied bias. Transient bias-switching experiments show that the nonresonant to resonant transition is reversible with the applied bias. We determine a general quantitative relationship that describes the transition voltage as a function of the molecular frontier orbital energies and electrode Fermi levels. Overall, this work highlights the importance of frontier orbital energy alignment in achieving efficient charge transport in molecular devices.
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Affiliation(s)
- Songsong Li
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Hao Yu
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Jialing Li
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Nicholas Angello
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Edward R Jira
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Bo Li
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Martin D Burke
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Carle Illinois College of Medicine, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Jeffrey S Moore
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Charles M Schroeder
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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11
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O’Driscoll LJ, Sangtarash S, Xu W, Daaoub A, Hong W, Sadeghi H, Bryce MR. Heteroatom Effects on Quantum Interference in Molecular Junctions: Modulating Antiresonances by Molecular Design. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:17385-17391. [PMID: 34476041 PMCID: PMC8397347 DOI: 10.1021/acs.jpcc.1c04242] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/25/2021] [Indexed: 05/25/2023]
Abstract
Controlling charge transport through molecular wires by utilizing quantum interference (QI) is a growing topic in single-molecular electronics. In this article, scanning tunneling microscopy-break junction techniques and density functional theory calculations are employed to investigate the single-molecule conductance properties of four molecules that have been specifically designed to test extended curly arrow rules (ECARs) for predicting QI in molecular junctions. Specifically, for two new isomeric 1-phenylpyrrole derivatives, the conductance pathway between the gold electrodes must pass through a nitrogen atom: this novel feature is designed to maximize the influence of the heteroatom on conductance properties and has not been the subject of prior investigations of QI. It is shown, experimentally and computationally, that the presence of a nitrogen atom in the conductance pathway increases the effect of changing the position of the anchoring group on the phenyl ring from para to meta, in comparison with biphenyl analogues. This effect is explained in terms of destructive QI (DQI) for the meta-connected pyrrole and shifted DQI for the para-connected isomer. These results demonstrate modulation of antiresonances by molecular design and verify the validity of ECARs as a simple "pen-and-paper" method for predicting QI behavior. The principles offer new fundamental insights into structure-property relationships in molecular junctions and can now be exploited in a range of different heterocycles for molecular electronic applications, such as switches based on external gating, or in thermoelectric devices.
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Affiliation(s)
- Luke J. O’Driscoll
- Department
of Chemistry, Durham University, Lower Mountjoy, Stockton Road, Durham DH1 3LE, U.K.
| | - Sara Sangtarash
- School
of Engineering, University of Warwick, Coventry CV4 7AL, U.K.
| | - Wei Xu
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, NEL,
College of Chemistry and Chemical
Engineering, Xiamen University, Xiamen 361005, China
| | - Abdalghani Daaoub
- School
of Engineering, University of Warwick, Coventry CV4 7AL, U.K.
| | - Wenjing Hong
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, NEL,
College of Chemistry and Chemical
Engineering, Xiamen University, Xiamen 361005, China
| | - Hatef Sadeghi
- School
of Engineering, University of Warwick, Coventry CV4 7AL, U.K.
| | - Martin R. Bryce
- Department
of Chemistry, Durham University, Lower Mountjoy, Stockton Road, Durham DH1 3LE, U.K.
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12
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Li Y, Zhang C, Ling S, Ma C, Zhang J, Jiang Y, Zhao R, Li H, Lu J, Zhang Q. Toward Highly Robust Nonvolatile Multilevel Memory by Fine Tuning of the Nanostructural Crystalline Solid-State Order. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100102. [PMID: 33788423 DOI: 10.1002/smll.202100102] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/01/2021] [Indexed: 06/12/2023]
Abstract
Organic resistive memory (ORM) offers great promise for next-generation high-density multilevel-cell (MLC) data storage. However, the fine tuning of crystalline order among its active layer still remains challenging, which largely restricts ORM behavior. Here, an exceptional solid-state transition from disordered orientations to highly-uniform orientation within the ORM layer is facilely triggered via molecular strategic tailoring. Two diketopyrrolopyrrole-based small molecular analogues (NI1 TDPP and NI2 TDPP) are demonstrated to display different symmetry. The asymmetric NI1 TDPP shows an irregular solid-state texture, while the centro-symmetric NI2 TDPP conforms to an ordered out-of-plane single-crystalline pattern that aligns with the foremost charge transportation along the substrate normal, and exhibits excellent MLC memory characteristics. Moreover, this highly oriented pattern guarantees the large-area film uniformity, leading to the twofold increase in the yield of as-fabricated ORM devices. This study reveals that the solid-state crystalline nanostructural order of organic materials can be controlled by reasonable molecular design to actuate high-performance organic electronic circuits.
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Affiliation(s)
- Yang Li
- Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, China
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Cheng Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Songtao Ling
- Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, China
| | - Chunlan Ma
- Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, China
| | - Jinlei Zhang
- Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, China
| | - Yucheng Jiang
- Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, China
| | - Run Zhao
- Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application, School of Physical Science and Technology, Suzhou University of Science and Technology, Suzhou, Jiangsu, 215009, China
| | - Hua Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Jianmei Lu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Qichun Zhang
- Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, 999077, China
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13
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Chen Y, Wang HC, Tang Y, Zhou Y, Huang L, Cao J, Tang C, Zhang M, Shi J, Liu J, Ren X, Xu YX, Hong W. Modulation of charge transport through single-molecule bilactam junctions by tuning hydrogen bonds. Chem Commun (Camb) 2021; 57:1935-1938. [PMID: 33498077 DOI: 10.1039/d0cc07423c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bilactam derivatives with different side groups were synthesized and the twisting angle tuning effect induced by the intramolecular hydrogen bond on the charge transport through their single-molecule junctions was investigated. Molecules with strong intramolecular hydrogen bonds exhibited twice higher conductance because of the reduced dihedral twisting, which was reversible with the addition of hydrogen bond destroying solvent. Our findings reveal that the presence of intramolecular hydrogen bonds promotes the planarization of the molecular structure without additional transmission channels, offering a new strategy for controlling molecular switches via tuning the molecular twisting.
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Affiliation(s)
- Yaorong Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Hua-Chun Wang
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Yongxiang Tang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Yu Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Longfeng Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Jian Cao
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Chun Tang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Manxi Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Jia Shi
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Junyang Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Xiancheng Ren
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Yun-Xiang Xu
- College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Wenjing Hong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China. and Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
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14
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Chen Y, Huang L, Chen H, Chen Z, Zhang H, Xiao Z, Hong W. Towards Responsive
Single‐Molecule
Device. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000420] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yaorong Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University Xiamen Fujian 361005 China
| | - Longfeng Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University Xiamen Fujian 361005 China
| | - Hang Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University Xiamen Fujian 361005 China
| | - Zhixin Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University Xiamen Fujian 361005 China
| | - Hewei Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University Xiamen Fujian 361005 China
| | - Zongyuan Xiao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University Xiamen Fujian 361005 China
| | - Wenjing Hong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University Xiamen Fujian 361005 China
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15
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Zang Y, Fung ED, Fu T, Ray S, Garner MH, Borges A, Steigerwald ML, Patil S, Solomon G, Venkataraman L. Voltage-Induced Single-Molecule Junction Planarization. NANO LETTERS 2021; 21:673-679. [PMID: 33337876 DOI: 10.1021/acs.nanolett.0c04260] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Probing structural changes of a molecule induced by charge transfer is important for understanding the physicochemical properties of molecules and developing new electronic devices. Here, we interrogate the structural changes of a single diketopyrrolopyrrole (DPP) molecule induced by charge transport at a high bias using scanning tunneling microscope break junction (STM-BJ) techniques. Specifically, we demonstrate that application of a high bias increases the average nonresonant conductance of single Au-DPP-Au junctions. We infer from the increased conductance that resonant charge transport induces planarization of the molecular backbone. We further show that this conformational planarization is assisted by thermally activated junction reorganization. The planarization only occurs under specific electronic conditions, which we rationalize by ab initio calculations. These results emphasize the need for a comprehensive view of single-molecule junctions which includes both the electronic properties and structure of the molecules and the electrodes when designing electrically driven single-molecule motors.
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Affiliation(s)
- Yaping Zang
- Department of Applied Physics, Columbia University, New York, New York 10027, United States
| | - E-Dean Fung
- Department of Applied Physics, Columbia University, New York, New York 10027, United States
| | - Tianren Fu
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Suman Ray
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
| | - Marc H Garner
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Copenhagen Ø DK-2100, Denmark
| | - Anders Borges
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Copenhagen Ø DK-2100, Denmark
| | - Michael L Steigerwald
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Satish Patil
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
| | - Gemma Solomon
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Copenhagen Ø DK-2100, Denmark
| | - Latha Venkataraman
- Department of Applied Physics, Columbia University, New York, New York 10027, United States
- Department of Chemistry, Columbia University, New York, New York 10027, United States
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16
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Iizuka T, Shimizu D, Matsuda K. STM apparent height measurements of molecular wires with different physical length attached on 2-D phase separated templates for evaluation of single molecular conductance. RSC Adv 2020; 10:22054-22057. [PMID: 35516632 PMCID: PMC9054516 DOI: 10.1039/d0ra04484a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/01/2020] [Indexed: 11/25/2022] Open
Abstract
Single molecular conductance of molecular wires is effectively evaluated by the combination of STM apparent height measurement and a 2-D phase separation technique. Previously the method was only applied to a set of molecular wires with the same physical length, but herein we applied the method to thienylene-based and phenylene-based molecular wires with different physical lengths. By considering the difference in physical molecular height including thermal contribution of conformational isomers, the conductance ratio was determined to be 1.3 ± 0.7, which is in agreement with the reported value determined by a break-junction method. Single molecular conductance of molecular wires is effectively evaluated by the combination of STM apparent height measurement and a 2-D phase separation technique.![]()
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Affiliation(s)
- Tomoya Iizuka
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Daiki Shimizu
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Kenji Matsuda
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
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17
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Ferri N, Algethami N, Vezzoli A, Sangtarash S, McLaughlin M, Sadeghi H, Lambert CJ, Nichols RJ, Higgins SJ. Hemilabile Ligands as Mechanosensitive Electrode Contacts for Molecular Electronics. Angew Chem Int Ed Engl 2019; 58:16583-16589. [PMID: 31364249 PMCID: PMC6899542 DOI: 10.1002/anie.201906400] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Indexed: 11/21/2022]
Abstract
Single-molecule junctions that are sensitive to compression or elongation are an emerging class of nanoelectromechanical systems (NEMS). Although the molecule-electrode interface can be engineered to impart such functionality, most studies to date rely on poorly defined interactions. We focused on this issue by synthesizing molecular wires designed to have chemically defined hemilabile contacts based on (methylthio)thiophene moieties. We measured their conductance as a function of junction size and observed conductance changes of up to two orders of magnitude as junctions were compressed and stretched. Localised interactions between weakly coordinating thienyl sulfurs and the electrodes are responsible for the observed effect and allow reversible monodentate⇄bidentate contact transitions as the junction is modulated in size. We observed an up to ≈100-fold sensitivity boost of the (methylthio)thiophene-terminated molecular wire compared with its non-hemilabile (methylthio)benzene counterpart and demonstrate a previously unexplored application of hemilabile ligands to molecular electronics.
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Affiliation(s)
- Nicolò Ferri
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
| | | | - Andrea Vezzoli
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
| | - Sara Sangtarash
- Department of PhysicsLancaster UniversityLancasterLA1 4YBUK
- School of EngineeringUniversity of WarwickCoventryCV4 7ALUK
| | - Maeve McLaughlin
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
| | - Hatef Sadeghi
- Department of PhysicsLancaster UniversityLancasterLA1 4YBUK
- School of EngineeringUniversity of WarwickCoventryCV4 7ALUK
| | | | - Richard J. Nichols
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
| | - Simon J. Higgins
- Department of ChemistryUniversity of LiverpoolCrown StreetLiverpoolL69 7ZDUK
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18
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Ferri N, Algethami N, Vezzoli A, Sangtarash S, McLaughlin M, Sadeghi H, Lambert CJ, Nichols RJ, Higgins SJ. Hemilabile Ligands as Mechanosensitive Electrode Contacts for Molecular Electronics. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906400] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nicolò Ferri
- Department of ChemistryUniversity of Liverpool Crown Street Liverpool L69 7ZD UK
| | - Norah Algethami
- Department of PhysicsLancaster University Lancaster LA1 4YB UK
| | - Andrea Vezzoli
- Department of ChemistryUniversity of Liverpool Crown Street Liverpool L69 7ZD UK
| | - Sara Sangtarash
- Department of PhysicsLancaster University Lancaster LA1 4YB UK
- School of EngineeringUniversity of Warwick Coventry CV4 7AL UK
| | - Maeve McLaughlin
- Department of ChemistryUniversity of Liverpool Crown Street Liverpool L69 7ZD UK
| | - Hatef Sadeghi
- Department of PhysicsLancaster University Lancaster LA1 4YB UK
- School of EngineeringUniversity of Warwick Coventry CV4 7AL UK
| | | | - Richard J. Nichols
- Department of ChemistryUniversity of Liverpool Crown Street Liverpool L69 7ZD UK
| | - Simon J. Higgins
- Department of ChemistryUniversity of Liverpool Crown Street Liverpool L69 7ZD UK
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19
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Lin G, Cheng M, Liou S, Tsao H, Lin C, Lin YR, Lee G, Chen C, Peng S. Revisit of trinickel metal string complexes [Ni
3
L
4
X
2
] (L = dipyridylamido, diazaphenoxazine; X = NCS, CN) for quantum transport. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201900229] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Geng‐Min Lin
- Department of Chemistry and Center for Emerging Material and Advanced DeviceNational Taiwan University Taipei Taiwan
| | | | - Shun‐Jie Liou
- Department of Chemistry and Center for Emerging Material and Advanced DeviceNational Taiwan University Taipei Taiwan
| | - Ho‐Sung Tsao
- Department of Chemistry and Center for Emerging Material and Advanced DeviceNational Taiwan University Taipei Taiwan
| | - Chih‐Hsun Lin
- Department of Chemistry and Center for Emerging Material and Advanced DeviceNational Taiwan University Taipei Taiwan
| | - Yi R. Lin
- Department of Chemistry and Center for Emerging Material and Advanced DeviceNational Taiwan University Taipei Taiwan
| | - Gene‐Hsiang Lee
- Department of Chemistry and Center for Emerging Material and Advanced DeviceNational Taiwan University Taipei Taiwan
| | - Chun‐hsien Chen
- Department of Chemistry and Center for Emerging Material and Advanced DeviceNational Taiwan University Taipei Taiwan
| | - Shie‐Ming Peng
- Department of Chemistry and Center for Emerging Material and Advanced DeviceNational Taiwan University Taipei Taiwan
- Institute of Chemistry, Academia Sinica Taipei Taiwan
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20
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Ie Y, Okamoto Y, Inoue T, Tone S, Seo T, Honda Y, Tanaka S, Lee SK, Ohto T, Yamada R, Tada H, Aso Y. Highly Planar and Completely Insulated Oligothiophenes: Effects of π-Conjugation on Hopping Charge Transport. J Phys Chem Lett 2019; 10:3197-3204. [PMID: 31132274 DOI: 10.1021/acs.jpclett.9b00747] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Elucidating the nature of long-range intramolecular charge transport in π-conjugated molecules is of great importance for the development of organic electronic materials. However, the effects of the degree of π-conjugation on the hopping charge transport have not been experimentally explored so far owing to the lack of π-conjugated backbones with different conjugation degrees and several-nanometer lengths. Here we develop highly planar and completely insulated oligothiophenes between 0.85 and 9.64 nm in length. As compared to distorted oligothiophenes, single-molecule conductance measurements of the planar molecules show (i) a smaller activation energy and larger electrical conductance in the hopping transport regime and (ii) a shift in crossover between tunneling and hopping conduction toward a short molecular length. Theoretical calculations indicate that small reorganization energies and narrow energy gaps derived from the planar backbones result in these superior characteristics. This study reveals that the planarity of π-conjugation has significant advantages for hopping charge transport.
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Affiliation(s)
- Yutaka Ie
- The Institute of Scientific and Industrial Research (ISIR) , Osaka University , 8-1 Mihogaoka , Ibaraki , Osaka 567-0047 , Japan
| | - Yuji Okamoto
- The Institute of Scientific and Industrial Research (ISIR) , Osaka University , 8-1 Mihogaoka , Ibaraki , Osaka 567-0047 , Japan
| | - Takuya Inoue
- The Institute of Scientific and Industrial Research (ISIR) , Osaka University , 8-1 Mihogaoka , Ibaraki , Osaka 567-0047 , Japan
| | - Saori Tone
- The Institute of Scientific and Industrial Research (ISIR) , Osaka University , 8-1 Mihogaoka , Ibaraki , Osaka 567-0047 , Japan
| | - Takuji Seo
- The Institute of Scientific and Industrial Research (ISIR) , Osaka University , 8-1 Mihogaoka , Ibaraki , Osaka 567-0047 , Japan
| | - Yasushi Honda
- West Japan Office, HPC Systems Inc. , 646 Nijohanjikicho , Shimogyo-ku, Kyoto 600-8412 , Japan
| | - Shoji Tanaka
- Research Center for Molecular Scale Nanoscience , Institute for Molecular Science , Okazaki , Aichi 444-8585 , Japan
| | - See Kei Lee
- Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama , Toyonaka , Osaka 560-8531 , Japan
| | - Tatsuhiko Ohto
- Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama , Toyonaka , Osaka 560-8531 , Japan
| | - Ryo Yamada
- Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama , Toyonaka , Osaka 560-8531 , Japan
| | - Hirokazu Tada
- Graduate School of Engineering Science , Osaka University , 1-3 Machikaneyama , Toyonaka , Osaka 560-8531 , Japan
| | - Yoshio Aso
- The Institute of Scientific and Industrial Research (ISIR) , Osaka University , 8-1 Mihogaoka , Ibaraki , Osaka 567-0047 , Japan
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21
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Milan DC, Vezzoli A, Planje IJ, Low PJ. Metal bis(acetylide) complex molecular wires: concepts and design strategies. Dalton Trans 2018; 47:14125-14138. [PMID: 29951669 DOI: 10.1039/c8dt02103a] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The past decade has seen a remarkable surge in studies of thin-film and single-molecule electronics, due in no small part to the development and advancement of experimental methods for the construction and measurement of metal|molecule|metal junctions. Within the plethora of molecular structures that have been investigated, metal complexes of general form trans-M(C[triple bond, length as m-dash]CR)2(Ln) have attracted attention from the inorganic and organometallic chemistry community in the search for efficient molecular wires due to the potential π-d-π orbital mixing along the molecular backbone. In this article progress towards this goal will be summarised, and design strategies for future molecular components discussed.
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Affiliation(s)
- David C Milan
- Department of Chemistry, University of Liverpool, Crown St, Liverpool, L69 7ZD, UK
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22
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Liu P, Gao F, Zhou L, Chen Y, Chen Z. Tetrathienyl-functionalized red- and NIR-absorbing BODIPY dyes appending various peripheral substituents. Org Biomol Chem 2018; 15:1393-1399. [PMID: 28101544 DOI: 10.1039/c6ob02612e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A series of boron-dipyrromethene dyes (BODIPYs) 4a-g with different thienyl moieties at 2,3,5,6-positions of the BODIPY core were synthesized by the Stille cross-coupling reaction. The new compounds were characterized by 1H NMR, 13C NMR, HRMS, and IR spectroscopy. The single crystal structure of compound 4e was obtained by X-ray crystallography. The optical and electrochemical properties of these dyes were studied by UV/Vis spectroscopy, fluorescence spectroscopy, and cyclic voltammetry. The DFT calculation of the frontier molecular orbitals of these dyes corroborates the observed effects of peripheral substituents on the optical and redox properties. These results reveal a good tunability of the optical and electronic properties of these BODIPYs by varying the peripheral groups at the α-positions of thienyl moieties, which leads to the absorption and emission reaching the NIR region.
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Affiliation(s)
- Ping Liu
- School of Chemical Engineering and Technology, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China. and Department of Chemistry, School of Sciences, Tianjin University, China
| | - Feng Gao
- School of Chemical Engineering and Technology, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China.
| | - Lina Zhou
- School of Chemical Engineering and Technology, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China.
| | - Yu Chen
- Department of Chemistry, School of Sciences, Tianjin University, China
| | - Zhijian Chen
- School of Chemical Engineering and Technology, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China.
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23
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Korshoj LE, Afsari S, Chatterjee A, Nagpal P. Conformational Smear Characterization and Binning of Single-Molecule Conductance Measurements for Enhanced Molecular Recognition. J Am Chem Soc 2017; 139:15420-15428. [PMID: 29017006 DOI: 10.1021/jacs.7b08246] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Electronic conduction or charge transport through single molecules depends primarily on molecular structure and anchoring groups and forms the basis for a wide range of studies from molecular electronics to DNA sequencing. Several high-throughput nanoelectronic methods such as mechanical break junctions, nanopores, conductive atomic force microscopy, scanning tunneling break junctions, and static nanoscale electrodes are often used for measuring single-molecule conductance. In these measurements, "smearing" due to conformational changes and other entropic factors leads to large variances in the observed molecular conductance, especially in individual measurements. Here, we show a method for characterizing smear in single-molecule conductance measurements and demonstrate how binning measurements according to smear can significantly enhance the use of individual conductance measurements for molecular recognition. Using quantum point contact measurements on single nucleotides within DNA macromolecules, we demonstrate that the distance over which molecular junctions are maintained is a measure of smear, and the resulting variance in unbiased single measurements depends on this smear parameter. Our ability to identify individual DNA nucleotides at 20× coverage increases from 81.3% accuracy without smear analysis to 93.9% with smear characterization and binning (SCRIB). Furthermore, merely 7 conductance measurements (7× coverage) are needed to achieve 97.8% accuracy for DNA nucleotide recognition when only low molecular smear measurements are used, which represents a significant improvement over contemporary sequencing methods. These results have important implications in a broad range of molecular electronics applications from designing robust molecular switches to nanoelectronic DNA sequencing.
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Affiliation(s)
- Lee E Korshoj
- Department of Chemical and Biological Engineering, ‡Renewable and Sustainable Energy Institute (RASEI), §BioFrontiers Institute, and ∥Materials Science and Engineering, University of Colorado Boulder , Boulder, Colorado 80309, United States
| | - Sepideh Afsari
- Department of Chemical and Biological Engineering, ‡Renewable and Sustainable Energy Institute (RASEI), §BioFrontiers Institute, and ∥Materials Science and Engineering, University of Colorado Boulder , Boulder, Colorado 80309, United States
| | - Anushree Chatterjee
- Department of Chemical and Biological Engineering, ‡Renewable and Sustainable Energy Institute (RASEI), §BioFrontiers Institute, and ∥Materials Science and Engineering, University of Colorado Boulder , Boulder, Colorado 80309, United States
| | - Prashant Nagpal
- Department of Chemical and Biological Engineering, ‡Renewable and Sustainable Energy Institute (RASEI), §BioFrontiers Institute, and ∥Materials Science and Engineering, University of Colorado Boulder , Boulder, Colorado 80309, United States
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24
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Wang M, Wang Y, Sanvito S, Hou S. The low-bias conducting mechanism of single-molecule junctions constructed with methylsulfide linker groups and gold electrodes. J Chem Phys 2017; 147:054702. [PMID: 28789544 DOI: 10.1063/1.4996745] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Minglang Wang
- Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
| | - Yongfeng Wang
- Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
- Beida Information Research (BIR), Tianjin 300457, China
| | - Stefano Sanvito
- School of Physics, AMBER and CRANN Institute, Trinity College, Dublin 2, Ireland
| | - Shimin Hou
- Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, China
- Beida Information Research (BIR), Tianjin 300457, China
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25
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Gryn'ova G, Ollitrault PJ, Corminboeuf C. Guidelines and diagnostics for charge carrier tuning in thiophene-based wires. Phys Chem Chem Phys 2017; 19:23254-23259. [DOI: 10.1039/c7cp04295g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Reported experimental trends in charge carrier tuning in single molecule junctions of oligothiophene-based wires are rationalized by means of frontier molecular orbital theory.
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Affiliation(s)
- Ganna Gryn'ova
- Institut des Sciences et Ingénierie Chimiques, École polytechnique fédérale de Lausanne
- CH-1015 Lausanne
- Switzerland
| | - Pauline J. Ollitrault
- Institut des Sciences et Ingénierie Chimiques, École polytechnique fédérale de Lausanne
- CH-1015 Lausanne
- Switzerland
| | - Clémence Corminboeuf
- Institut des Sciences et Ingénierie Chimiques, École polytechnique fédérale de Lausanne
- CH-1015 Lausanne
- Switzerland
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26
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Yamada A, Feng Q, Hoskins A, Fenk KD, Dunietz BD. Achieving Predictive Description of Molecular Conductance by Using a Range-Separated Hybrid Functional. NANO LETTERS 2016; 16:6092-6098. [PMID: 27636328 DOI: 10.1021/acs.nanolett.6b02241] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The conductance of molecular bridges tends to be overestimated by computational studies in comparison to measured values. While this well-established trend may be related to difficulties for achieving robust bridges, the employed computational scheme can also contribute to this tendency. In particular, caveats of the traditional functionals employed in first-principles-based calculations can lead to discrepancies reflected in exaggerated conductance. Here, we show that by employing a range-separated hybrid functional the calculated values are within the same order as the measured conductance for all four considered cases. On the other hand, with B3LYP, which is a widely used functional, the calculated values greatly overestimate the conductance (by about 1-2 orders of magnitude). The improved description of the conductance with a RSH functional builds on achieving a physically meaningful treatment of the quasi particles associated with the frontier orbitals.
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Affiliation(s)
- Atsushi Yamada
- Department of Chemistry and Biochemistry, Kent State University , Kent, Ohio 44242, United States
| | - Qingguo Feng
- Department of Chemistry and Biochemistry, Kent State University , Kent, Ohio 44242, United States
| | - Austin Hoskins
- Department of Chemistry and Biochemistry, Kent State University , Kent, Ohio 44242, United States
| | - Kevin D Fenk
- Department of Chemistry and Biochemistry, Kent State University , Kent, Ohio 44242, United States
| | - Barry D Dunietz
- Department of Chemistry and Biochemistry, Kent State University , Kent, Ohio 44242, United States
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27
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Shynkaruk O, Qi Y, Cottrell-Callbeck A, Torres Delgado W, McDonald R, Ferguson MJ, He G, Rivard E. Modular Synthesis of Diarylalkynes and Their Efficient Conversion into Luminescent Tetraarylbutadienes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00298] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Olena Shynkaruk
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - Yanyu Qi
- Frontier
Institute of Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710054, People’s Republic of China
| | - Aiden Cottrell-Callbeck
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - William Torres Delgado
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - Robert McDonald
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - Michael J. Ferguson
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
| | - Gang He
- Frontier
Institute of Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi Province 710054, People’s Republic of China
| | - Eric Rivard
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2G2
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28
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Xiang L, Hines T, Palma JL, Lu X, Mujica V, Ratner MA, Zhou G, Tao N. Non-exponential Length Dependence of Conductance in Iodide-Terminated Oligothiophene Single-Molecule Tunneling Junctions. J Am Chem Soc 2016; 138:679-87. [DOI: 10.1021/jacs.5b11605] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Limin Xiang
- Center
for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
- School
of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Thomas Hines
- Center
for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
| | - Julio L. Palma
- Center
for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
- School
of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Xuefeng Lu
- Laboratory
of Advanced Materials, Fudan University, Shanghai 200438, P.R. China
| | - Vladimiro Mujica
- School
of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Mark A. Ratner
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Gang Zhou
- Laboratory
of Advanced Materials, Fudan University, Shanghai 200438, P.R. China
| | - Nongjian Tao
- Center
for Biosensors and Bioelectronics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287, United States
- School
of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, United States
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29
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Smith CE, Odoh SO, Ghosh S, Gagliardi L, Cramer CJ, Frisbie CD. Length-Dependent Nanotransport and Charge Hopping Bottlenecks in Long Thiophene-Containing π-Conjugated Molecular Wires. J Am Chem Soc 2015; 137:15732-41. [DOI: 10.1021/jacs.5b07400] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Christopher E. Smith
- Department of Chemistry and ‡Department of
Chemical Engineering and Materials
Science, §Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Samuel O. Odoh
- Department of Chemistry and ‡Department of
Chemical Engineering and Materials
Science, §Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Soumen Ghosh
- Department of Chemistry and ‡Department of
Chemical Engineering and Materials
Science, §Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Laura Gagliardi
- Department of Chemistry and ‡Department of
Chemical Engineering and Materials
Science, §Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Christopher J. Cramer
- Department of Chemistry and ‡Department of
Chemical Engineering and Materials
Science, §Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - C. Daniel Frisbie
- Department of Chemistry and ‡Department of
Chemical Engineering and Materials
Science, §Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
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30
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Lee J, Rajeeva BB, Yuan T, Guo ZH, Lin YH, Al-Hashimi M, Zheng Y, Fang L. Thermodynamic synthesis of solution processable ladder polymers. Chem Sci 2015; 7:881-889. [PMID: 28791119 PMCID: PMC5530004 DOI: 10.1039/c5sc02385h] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 11/05/2015] [Indexed: 11/30/2022] Open
Abstract
The synthesis of a carbazole-derived, well-defined ladder polymer was achieved under thermodynamic control by employing reversible ring-closing olefin metathesis.
The synthesis of a carbazole-derived, well-defined ladder polymer was achieved under thermodynamic control by employing reversible ring-closing olefin metathesis. This unique approach featured mild conditions and excellent efficiency, affording the ladder polymer backbone with minimum levels of unreacted defects. Rigorous NMR analysis on a 13C isotope-enriched product revealed that the main-chain contained less than 1% of unreacted precursory vinyl groups. The rigid conformation of the ladder-type backbone was confirmed by photophysical analysis, while the extended rod-like structure was visualized under scanning tunneling microscope. Excellent solubility of this polymer in common organic solvents allowed for feasible processing of thin films using solution-casting techniques. Atomic force microscopy and grazing incident X-ray scattering revealed a uniform and amorphous morphology of these films, in sharp contrast to the polycrystalline thin films of its small molecular counterpart.
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Affiliation(s)
- Jongbok Lee
- Department of Chemistry , Texas A&M University , 3255 TAMU , College Station , TX 77843 , USA .
| | - Bharath Bangalore Rajeeva
- Department of Mechanical Engineering , Materials Science and Engineering Program , Texas Materials Institute , The University of Texas at Austin , Austin , Texas 78712 , USA
| | - Tianyu Yuan
- Department of Chemistry , Texas A&M University , 3255 TAMU , College Station , TX 77843 , USA . .,Materials Science & Engineering Department , Texas A&M University , 3003 TAMU , College Station , TX 77843 , USA
| | - Zi-Hao Guo
- Department of Chemistry , Texas A&M University , 3255 TAMU , College Station , TX 77843 , USA .
| | - Yen-Hao Lin
- Department of Chemistry , Texas A&M University , 3255 TAMU , College Station , TX 77843 , USA .
| | - Mohammed Al-Hashimi
- Department of Chemistry , Texas A&M University at Qatar , P.O. Box 23874 , Doha , Qatar
| | - Yuebing Zheng
- Department of Mechanical Engineering , Materials Science and Engineering Program , Texas Materials Institute , The University of Texas at Austin , Austin , Texas 78712 , USA
| | - Lei Fang
- Department of Chemistry , Texas A&M University , 3255 TAMU , College Station , TX 77843 , USA . .,Materials Science & Engineering Department , Texas A&M University , 3003 TAMU , College Station , TX 77843 , USA
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31
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Reecht G, Bulou H, Scheurer F, Speisser V, Mathevet F, González C, Dappe YJ, Schull G. Pulling and Stretching a Molecular Wire to Tune its Conductance. J Phys Chem Lett 2015; 6:2987-2992. [PMID: 26267192 DOI: 10.1021/acs.jpclett.5b01283] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A scanning tunnelling microscope is used to pull a polythiophene wire from a Au(111) surface while measuring the current traversing the junction. Abrupt current increases measured during the lifting procedure are associated with the detachment of molecular subunits, in apparent contradiction with the expected exponential decrease of the conductance with wire length. Ab initio simulations reproduce the experimental data and demonstrate that this unexpected behavior is due to release of mechanical stress in the wire, paving the way to mechanically gated single-molecule electronic devices.
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Affiliation(s)
- Gaël Reecht
- †IPCMS de Strasbourg, UMR 7504 (CNRS - Université de Strasbourg), 67034 Strasbourg, France
| | - Hervé Bulou
- †IPCMS de Strasbourg, UMR 7504 (CNRS - Université de Strasbourg), 67034 Strasbourg, France
| | - Fabrice Scheurer
- †IPCMS de Strasbourg, UMR 7504 (CNRS - Université de Strasbourg), 67034 Strasbourg, France
| | - Virginie Speisser
- †IPCMS de Strasbourg, UMR 7504 (CNRS - Université de Strasbourg), 67034 Strasbourg, France
| | - Fabrice Mathevet
- ‡Institut Parisien de Chimie Moléculaire, Chimie des Polymères, UMR 8232, (CNRS - Université Pierre et Marie Curie), 75252 Paris, France
| | - César González
- §Service de Physique de l'Etat Condensé, DSM/IRAMIS/SPEC, CNRS UMR 3680, CEA Saclay, 91191 Gif sur Yvette cedex, France
| | - Yannick J Dappe
- §Service de Physique de l'Etat Condensé, DSM/IRAMIS/SPEC, CNRS UMR 3680, CEA Saclay, 91191 Gif sur Yvette cedex, France
| | - Guillaume Schull
- †IPCMS de Strasbourg, UMR 7504 (CNRS - Université de Strasbourg), 67034 Strasbourg, France
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32
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Dell EJ, Capozzi B, Xia J, Venkataraman L, Campos LM. Molecular length dictates the nature of charge carriers in single-molecule junctions of oxidized oligothiophenes. Nat Chem 2015; 7:209-14. [DOI: 10.1038/nchem.2160] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 12/12/2014] [Indexed: 12/22/2022]
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33
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Vikramaditya T, Saisudhakar M, Sumithra K. Electronic structure of α-oligothiophenes with various substituents. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.09.087] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Berritta M, Manrique DZ, Lambert CJ. Interplay between quantum interference and conformational fluctuations in single-molecule break junctions. NANOSCALE 2015; 7:1096-1101. [PMID: 25479372 DOI: 10.1039/c4nr05316h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We theoretically explored the combined role of conformational fluctuations and quantum interference in determining the electrical conductance of single-molecule break junctions. In particular we computed the conductance of a family of methylsulfide-functionalized trans-α,ω-diphenyloligoene molecules, with terminal phenyl rings containing meta or para linkages, for which (at least in the absence of fluctuations) destructive interference in the former is expected to decrease their electrical conductance compared with the latter. We compared the predictions of density functional theory (DFT), in which fluctuational effects are absent, with results for the conformationally-averaged conductance obtained from an ensemble of conformations obtained from classical molecular dynamics. We found that junctions formed from these molecules exhibit distinct transport regimes during junction evolution and the signatures of quantum interference in these molecules survive the effect of conformational fluctuations. Furthermore, the agreement between theory and experiment is significantly improved by including conformational averaging.
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Affiliation(s)
- Marco Berritta
- Department of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden
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35
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Chen YA, Liu CY. Convenient synthesis of organic-electronics-oriented building blocks via on-water and under-air homocoupling of (hetero)aryl iodides. RSC Adv 2015. [DOI: 10.1039/c5ra13517f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
An on-water homocoupling reaction is developed for the alternative synthesis of various organic-electronically versatile bi(hetero)aryls. These multi-function building blocks are indispensable to polymer chemistry and modern organic electronics.
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Affiliation(s)
- Yi-An Chen
- Department of Chemical and Materials Engineering
- National Central University
- Taoyuan
- Republic of China
| | - Ching-Yuan Liu
- Department of Chemical and Materials Engineering
- National Central University
- Taoyuan
- Republic of China
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36
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Capozzi B, Dell EJ, Berkelbach TC, Reichman DR, Venkataraman L, Campos LM. Length-Dependent Conductance of Oligothiophenes. J Am Chem Soc 2014; 136:10486-92. [DOI: 10.1021/ja505277z] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Brian Capozzi
- Department
of Applied Physics and Mathematics, Columbia University, New York, New York 10027, United States
| | - Emma J. Dell
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - Timothy C. Berkelbach
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - David R. Reichman
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
| | - Latha Venkataraman
- Department
of Applied Physics and Mathematics, Columbia University, New York, New York 10027, United States
| | - Luis M. Campos
- Department
of Chemistry, Columbia University, New York, New York 10027, United States
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37
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Molina D, Guerrero A, Garcia-Belmonte G, Fernández-Lázaro F, Sastre-Santos Á. Synthesis of a Fully Conjugated Phthalocyanine-Diketopyrrolopyrrole-Phthalocyanine Triad as Low Band Gap Donor in Small Molecule Bulk Heterojunction Solar Cells. European J Org Chem 2014. [DOI: 10.1002/ejoc.201400147] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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38
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Ulman K, Narasimhan S, Delin A. Tuning spin transport properties and molecular magnetoresistance through contact geometry. J Chem Phys 2014; 140:044716. [DOI: 10.1063/1.4862546] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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