1
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Medhi B, Nath U, Sarma M. Revisiting fulgide photochromism: Mechanistic decoding and electron transport from computational exploration. J Chem Phys 2024; 160:154308. [PMID: 38634497 DOI: 10.1063/5.0203307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 04/01/2024] [Indexed: 04/19/2024] Open
Abstract
The photochromic behavior of the fulgide molecule relies on ring-closure and ring-opening processes involving conical intersections during excited state transformation between isomers. The precise location and topography of these conical intersections significantly shape the decay process and fluorescence phenomena inherent to the molecule. This work combines electronic structure theory calculations using the density functional theory and wavefunction methods, as well as surface hopping simulation to analyze the photochemical behavior of an experimentally synthesized fulgide molecule, (E)-p-methylacetophenylisopropylidenesuccinic anhydride (1E). Our study reveals the conical intersection between the first excited state (S1) and the ground electronic state (S0), which emerges beyond the S1 minimum of 1E to the ring-closing side. The distinctive topography of this conical intersection appears to be sloped. These findings suggest a reduced quantum yield for the formation of the closed isomer, indicating a higher likelihood of reformation of the open isomer(s). The surface hopping simulation further supports this observation, revealing a mere ∼8% quantum yield for the formation of the closed isomer. In addition, the photoisomerization of the fulgide molecule initiates a cascade of conduction switching and holds great potential for applications in molecular electronics. Delving into the realm of molecular electronics, we have further examined the electron transport properties, disclosing the higher conductivity of the closed isomer.
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Affiliation(s)
- Biman Medhi
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam, India
| | - Upasana Nath
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam, India
| | - Manabendra Sarma
- Department of Chemistry, Indian Institute of Technology, Guwahati, Assam, India
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2
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Zhang HY, Zhang N, Zhang Y, Jiang HH, Zeng YL, Tang SY, Li PF, Tang YY, Xiong RG. Ferroelectric Phase Transition Driven by Switchable Covalent Bonds. PHYSICAL REVIEW LETTERS 2023; 130:176802. [PMID: 37172248 DOI: 10.1103/physrevlett.130.176802] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 04/05/2023] [Indexed: 05/14/2023]
Abstract
The mechanism on ferroelectric phase transitions is mainly attributed to the displacive and/or order-disorder transition of internal components since the discovery of the ferroelectricity in 1920, rather than the breaking and recombination of chemical bonds. Here, we demonstrate how to utilize the chemical bond rearrangement in a diarylethene-based crystal to realize the light-driven mm2F1-type ferroelectric phase transition. Such a photoinduced phase transition is entirely driven by switchable covalent bonds with breaking and reformation, enabling the reversible light-controllable ferroelectric polarization switching, dielectric and nonlinear optical bistability. Moreover, light as quantized energy can achieve contactless, nondestructive, and remote-control operations. This work proposes a new mechanism of ferroelectric phase transition, and highlights the significance of photochromic molecules in designing new ferroelectrics for photocontrol data storage and sensing.
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Affiliation(s)
- Han-Yue Zhang
- Jiangsu Key Laboratory for Biomaterials and Devices, State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, People's Republic of China
| | - Nan Zhang
- Jiangsu Key Laboratory for Biomaterials and Devices, State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, People's Republic of China
| | - Yao Zhang
- Jiangsu Key Laboratory for Biomaterials and Devices, State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, People's Republic of China
| | - Huan-Huan Jiang
- Jiangsu Key Laboratory for Biomaterials and Devices, State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, People's Republic of China
| | - Yu-Ling Zeng
- Ordered Matter Science Research Center, Nanchang University, Nanchang 330031, People's Republic of China
| | - Shu-Yu Tang
- Ordered Matter Science Research Center, Nanchang University, Nanchang 330031, People's Republic of China
| | - Peng-Fei Li
- Ordered Matter Science Research Center, Nanchang University, Nanchang 330031, People's Republic of China
| | - Yuan-Yuan Tang
- Ordered Matter Science Research Center, Nanchang University, Nanchang 330031, People's Republic of China
| | - Ren-Gen Xiong
- Jiangsu Key Laboratory for Biomaterials and Devices, State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, People's Republic of China
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3
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Kumar A, Sahoo PR, Kathuria I, Prakash K, Kumar S. Oxazine as an efficient precursor for the development of photochromic spiropyrans. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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4
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Salazar E, Reinink S, Faraji S. Providing theoretical insight into the role of symmetry in the photoisomerization mechanism of a non-symmetric dithienylethene photoswitch. Phys Chem Chem Phys 2022; 24:11592-11602. [PMID: 35531648 PMCID: PMC9116444 DOI: 10.1039/d2cp00550f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Dithienylethene (DTE) molecular photoswitches have shown to be excellent candidates in the design of efficient optoelectronic devices, due to their high photoisomerization quantum yield (QY), for which symmetry is suggested to play a crucial role. Here, we present a theoretical study on the photochemistry of a non-symmetric dithienylethene photoswitch, with a special emphasis on the effect of asymmetric substitution on the photocyclization and photoreversion mechanisms. We used the Spin-Flip Time Dependent Density Functional Theory (SF-TDDFT) method to locate and characterize the main structures (conical intersections and minima) of the ground state and the first two excited states, S1 and S2, along the ring-opening/closure reaction coordinate of the photocyclization and photoreversion processes, and to identify the important coordinates governing the radiationless decay pathways. Our results suggest that while the main features that characterize the photoisomerization of symmetric DTEs are also present for the photoisomerization of the non-symmetric DTE, the lower energy barrier on S1 along the cycloreversion reaction speaks in favor of a more efficient and therefore a higher cycloreversion QY for the non-symmetric DTEs, making them a better candidate for molecular optoelectronic devices than their symmetric counterparts.
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Affiliation(s)
- Edison Salazar
- Theoretical Chemistry, Zernike Institute for Advanced Materials, University of GroningenNijenborgh 49747 AG GroningenThe Netherlands
| | - Suzanne Reinink
- Theoretical Chemistry, Zernike Institute for Advanced Materials, University of GroningenNijenborgh 49747 AG GroningenThe Netherlands
| | - Shirin Faraji
- Theoretical Chemistry, Zernike Institute for Advanced Materials, University of GroningenNijenborgh 49747 AG GroningenThe Netherlands
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5
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Oruganti B, Pál Kalapos P, Bhargav V, London G, Durbeej B. Photoinduced Changes in Aromaticity Facilitate Electrocyclization of Dithienylbenzene Switches. J Am Chem Soc 2020; 142:13941-13953. [PMID: 32666793 PMCID: PMC7458422 DOI: 10.1021/jacs.0c06327] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
![]()
The concepts of excited-state
aromaticity and antiaromaticity have
in recent years with increasing frequency been invoked to rationalize
the photochemistry of cyclic conjugated organic compounds, with the
long-term goal of using these concepts to improve the reactivities
of such compounds toward different photochemical transformations.
In this regard, it is of particular interest to assess how the presence
of a benzene motif affects photochemical reactivity, as benzene is
well-known to completely change its aromatic character in its lowest
excited states. Here, we investigate how a benzene motif influences
the photoinduced electrocyclization of dithienylethenes, a major class
of molecular switches. Specifically, we report on the synthesis of
a dithienylbenzene switch where the typical nonaromatic, ethene-like
motif bridging the two thienyl units is replaced by a benzene motif,
and show that this compound undergoes electrocyclization upon irradiation
with UV-light. Furthermore, through a detailed quantum chemical analysis,
we demonstrate that the electrocyclization is driven jointly and synergistically
by the loss of aromaticity in this motif from the formation of a reactive,
antiaromatic excited state during the initial photoexcitation, and
by the subsequent relief of this antiaromaticity as the reaction progresses
from the Franck–Condon region. Overall, we conclude that photoinduced
changes in aromaticity facilitate the electrocyclization of dithienylbenzene
switches.
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Affiliation(s)
- Baswanth Oruganti
- Department of Chemistry and Biomedical Sciences, Faculty of Health and Life Sciences, Linnaeus University, SE-45041 Kalmar, Sweden
| | - Péter Pál Kalapos
- MTA-TTK "Lendület" Functional Organic Materials Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, 1117 Budapest, Hungary
| | - Varada Bhargav
- Department of Chemistry, GITAM Institute of Science, GITAM (deemed to be University), Visakhapatnam 530045, Andhra Pradesh, India
| | - Gábor London
- MTA-TTK "Lendület" Functional Organic Materials Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, 1117 Budapest, Hungary
| | - Bo Durbeej
- Division of Theoretical Chemistry, IFM, Linköping University, SE-58183 Linköping, Sweden
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6
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Behnia S, Fathizadeh S, Javanshour E, Nemati F. Light-Driven Modulation of Electrical Current through DNA Sequences: Engineering of a Molecular Optical Switch. J Phys Chem B 2020; 124:3261-3270. [DOI: 10.1021/acs.jpcb.0c00073] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- S. Behnia
- Department of Physics, Urmia University of Technology, Urmia 5716693187, Iran
| | - S. Fathizadeh
- Department of Physics, Urmia University of Technology, Urmia 5716693187, Iran
| | - E. Javanshour
- Department of Physics, Urmia University of Technology, Urmia 5716693187, Iran
| | - F. Nemati
- Department of Physics, Urmia University of Technology, Urmia 5716693187, Iran
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7
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Size evolution study on the electronic and optical properties of gold-cluster complexes Au4-S-CnH2n-S′-Au4′ (n = 2–5). Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136625] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Optically controlled field effect transistors based on photochromic spiropyran and fullerene C60 films. MENDELEEV COMMUNICATIONS 2019. [DOI: 10.1016/j.mencom.2019.03.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Fedorov YV, Shepel NE, Peregudov AS, Fedorova OA, Deligeorgiev T, Minkovska S. Modulation of photochromic properties of spirooxazine bearing sulfobutyl substituent by metal ions. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.10.045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Xin N, Jia C, Wang J, Wang S, Li M, Gong Y, Zhang G, Zhu D, Guo X. Thermally Activated Tunneling Transition in a Photoswitchable Single-Molecule Electrical Junction. J Phys Chem Lett 2017; 8:2849-2854. [PMID: 28598631 DOI: 10.1021/acs.jpclett.7b01063] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Exploring the charge transport process in molecular junctions is essential to the development of molecular electronics. Here, we investigate the temperature-dependent charge transport mechanism of carbon electrode-diarylethene single-molecule junctions, which possess photocontrollable molecular orbital energy levels due to reversible photoisomerization of individual diarylethenes between open and closed conformations. Both the experimental results and theoretical calculations consistently demonstrate that the vibronic coupling (thermally activated at the proper temperature) drives the transition of charge transport in the junctions from coherent tunneling to incoherent transport. Due to the subtle electron-phonon coupling effect, incoherent transport in the junctions proves to have different activation energies, depending on the photoswitchable molecular energy levels of two different conformations. These results improve fundamental understanding of charge transport mechanisms in molecular junctions and should lead to the rapid development of functional molecular devices toward practical applications.
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Affiliation(s)
- Na Xin
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Chuancheng Jia
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Jinying Wang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Shuopei Wang
- Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Mingliang Li
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Yao Gong
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
| | - Guangyu Zhang
- Institute of Physics, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Daoben Zhu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
| | - Xuefeng Guo
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871, People's Republic of China
- Department of Materials Science and Engineering, College of Engineering, Peking University , Beijing 100871, People's Republic of China
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11
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Weckbecker D, Coto PB, Thoss M. Controlling the Conductance of a Graphene-Molecule Nanojunction by Proton Transfer. NANO LETTERS 2017; 17:3341-3346. [PMID: 28452493 DOI: 10.1021/acs.nanolett.6b04813] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The possibility of using single molecule junctions as components of nanoelectronic devices has motivated intensive experimental and theoretical research on the underlying transport mechanism in these systems. In this Letter, we investigate from a theoretical perspective intramolecular proton transfer reactions as a mechanism for controlling the conductance state of graphene-based molecular junctions. Employing a methodology that combines first-principles electronic structure methods with transport approaches, we show that the proton transfer reaction proceeds via a stepwise mechanism, giving rise to several tautomers with different conductance states. The analysis reveals that the relative stability of the tautomers as well as the energy barrier for their interconversion can be controlled by means of an external electrostatic field, which provides a mechanism for switching the nanojunction.
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Affiliation(s)
- D Weckbecker
- Institute for Theoretical Physics and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg , Staudtstr. 7/B2, 91058 Erlangen, Germany
| | - P B Coto
- Institute for Theoretical Physics and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg , Staudtstr. 7/B2, 91058 Erlangen, Germany
| | - M Thoss
- Institute for Theoretical Physics and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg , Staudtstr. 7/B2, 91058 Erlangen, Germany
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12
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Shao L, Zhao J, Cui B, Fang C, Liu D. A first-principles study of overcrowded alkene-based light-driven rotary molecular motor as a possible optical molecular switch. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.04.056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Olsen ST, Brøndsted Nielsen M, Hansen T, Ratner MA, Mikkelsen KV. A Study of Electrocyclic Reactions in a Molecular Junction: Mechanistic and Energetic Requirements for Switching in the Coulomb Blockade Regime. Chemphyschem 2017; 18:1517-1525. [DOI: 10.1002/cphc.201700140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Stine T. Olsen
- Department of Chemistry; University of Copenhagen; Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Mogens Brøndsted Nielsen
- Department of Chemistry; University of Copenhagen; Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Thorsten Hansen
- Department of Chemistry; University of Copenhagen; Universitetsparken 5 DK-2100 Copenhagen Denmark
| | - Mark A. Ratner
- Department of Chemistry; Northwestern University; 2145 Sheridan Road Evanston, Il. 60208 USA
| | - Kurt V. Mikkelsen
- Department of Chemistry; University of Copenhagen; Universitetsparken 5 DK-2100 Copenhagen Denmark
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14
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Hofmeister C, Coto PB, Thoss M. Controlling the conductance of molecular junctions using proton transfer reactions: A theoretical model study. J Chem Phys 2017. [DOI: 10.1063/1.4974512] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Chriszandro Hofmeister
- Institut für Theoretische Physik und Interdisziplinäres Zentrum für Molekulare Materialien, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 7/B2, D-91058 Erlangen, Germany
| | - Pedro B. Coto
- Institut für Theoretische Physik und Interdisziplinäres Zentrum für Molekulare Materialien, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 7/B2, D-91058 Erlangen, Germany
| | - Michael Thoss
- Institut für Theoretische Physik und Interdisziplinäres Zentrum für Molekulare Materialien, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 7/B2, D-91058 Erlangen, Germany
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15
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Size evolution relativistic DFT-QTAIM study on the gold cluster complexes Au4-S-CnH2n-S′-Au4′ (n = 2–5). Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.08.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Zobač V, Lewis JP, Jelínek P. Non-adiabatic molecular dynamic simulations of opening reaction of molecular junctions. NANOTECHNOLOGY 2016; 27:285202. [PMID: 27255903 DOI: 10.1088/0957-4484/27/28/285202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report non-adiabatic molecular dynamic simulations of the ring opening reaction of diarylethene (DAE) derivative molecules, both free standing and embedded between gold electrodes. Simulations are performed by the surface hopping method employing density functional theory. Typically, the free-standing molecules exhibit large quantum yields to open and close; however the process is quenched for the molecules embedded between electrodes. Our simulations reveal the importance of the DAE side chemical groups, which explain the efficiency of the quenching process. Namely, delocalization of the LUMO state contributes to electronic coupling between the molecule and electrodes, suppressing or enhancing the reaction process. The simulations indicate that a proper choice of the chemical side group, which provides the strong localization of the LUMO state, can substantially diminish the quenching mechanism. Additionally, we analyze a strong dependency of the quantum yield of the opening reaction coming from the mechanical strength of the molecules.
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Affiliation(s)
- Vladmír Zobač
- Institute of Physic, Academy of Sciences of the Czech Republic, Cukrovarnická 10, CZ-16200, Prague, Czech Republic. Department of Physical Electronics, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 10, CZ-11519, Prague, Czech Republic
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17
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Sendler T, Luka-Guth K, Wieser M, Lokamani, Wolf J, Helm M, Gemming S, Kerbusch J, Scheer E, Huhn T, Erbe A. Light-Induced Switching of Tunable Single-Molecule Junctions. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2015; 2:1500017. [PMID: 27980936 PMCID: PMC5115361 DOI: 10.1002/advs.201500017] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 03/13/2015] [Indexed: 12/12/2023]
Abstract
A major goal of molecular electronics is the development and implementation of devices such as single-molecular switches. Here, measurements are presented that show the controlled in situ switching of diarylethene molecules from their nonconductive to conductive state in contact to gold nanoelectrodes via controlled light irradiation. Both the conductance and the quantum yield for switching of these molecules are within a range making the molecules suitable for actual devices. The conductance of the molecular junctions in the opened and closed states is characterized and the molecular level E0, which dominates the current transport in the closed state, and its level broadening Γ are identified. The obtained results show a clear light-induced ring forming isomerization of the single-molecule junctions. Electron withdrawing side-groups lead to a reduction of conductance, but do not influence the efficiency of the switching mechanism. Quantum chemical calculations of the light-induced switching processes correlate these observations with the fundamentally different low-lying electronic states of the opened and closed forms and their comparably small modification by electron-withdrawing substituents. This full characterization of a molecular switch operated in a molecular junction is an important step toward the development of real molecular electronics devices.
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Affiliation(s)
- Torsten Sendler
- Helmholtz-Zentrum Dresden - Rossendorf Bautzner Landstraße 400 01328 Dresden Germany
| | | | - Matthias Wieser
- Helmholtz-Zentrum Dresden - Rossendorf Bautzner Landstraße 400 01328 Dresden Germany
| | - Lokamani
- Institute for Materials Science and Max Bergmann Center of Biomaterials Dresden Technische Universität Dresden 01062 Dresden Germany
| | - Jannic Wolf
- Fachbereich Chemie Universität Konstanz 78457 Konstanz Germany
| | - Manfred Helm
- Helmholtz-Zentrum Dresden - Rossendorf Bautzner Landstraße 40001328 Dresden Germany; Center for Advancing Electronics Dresden Technische Universität Dresden 01062 Dresden Germany
| | - Sibylle Gemming
- Helmholtz-Zentrum Dresden - Rossendorf Bautzner Landstraße 40001328 Dresden Germany; Faculty of Science Technische Universität Chemnitz 09107 Chemnitz Germany
| | - Jochen Kerbusch
- Helmholtz-Zentrum Dresden - Rossendorf Bautzner Landstraße 40001328 Dresden Germany; Center for Advancing Electronics Dresden Technische Universität Dresden 01062 Dresden Germany
| | - Elke Scheer
- Department of Physics Universität Konstanz 78457 Konstanz Germany
| | - Thomas Huhn
- Fachbereich Chemie Universität Konstanz 78457 Konstanz Germany
| | - Artur Erbe
- Helmholtz-Zentrum Dresden - Rossendorf Bautzner Landstraße 400 01328 Dresden Germany
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18
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Liao J, Blok S, van der Molen SJ, Diefenbach S, Holleitner AW, Schönenberger C, Vladyka A, Calame M. Ordered nanoparticle arrays interconnected by molecular linkers: electronic and optoelectronic properties. Chem Soc Rev 2015; 44:999-1014. [DOI: 10.1039/c4cs00225c] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Arrays of metal nanoparticles in an organic matrix have attracted a lot of interest due to their diverse electronic and optoelectronic properties.
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Affiliation(s)
- Jianhui Liao
- Key Laboratory for the Physics and Chemistry of Nanodevices
- Department of Electronics
- Peking University
- Beijing 100871
- China
| | - Sander Blok
- Leiden Institute of Physics
- Universiteit Leiden
- 2333 CA Leiden
- Netherlands
| | | | - Sandra Diefenbach
- Walter Schottky Institut and Physik-Department
- Technische Universtität München
- 85748 Garching
- Germany
- Nanosystems Initiative Munich (NIM)
| | - Alexander W. Holleitner
- Walter Schottky Institut and Physik-Department
- Technische Universtität München
- 85748 Garching
- Germany
- Nanosystems Initiative Munich (NIM)
| | | | - Anton Vladyka
- Department of Physics
- Universität Basel
- 4056 Basel
- Switzerland
| | - Michel Calame
- Department of Physics
- Universität Basel
- 4056 Basel
- Switzerland
- Swiss Nanoscience Institute
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19
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Irie M, Fukaminato T, Matsuda K, Kobatake S. Photochromism of Diarylethene Molecules and Crystals: Memories, Switches, and Actuators. Chem Rev 2014; 114:12174-277. [DOI: 10.1021/cr500249p] [Citation(s) in RCA: 1755] [Impact Index Per Article: 175.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Masahiro Irie
- Research
Center for Smart Molecules, Rikkyo University, Nishi-Ikebukuro 3-34-1, Toshima-ku, Tokyo 171-8501, Japan
| | - Tuyoshi Fukaminato
- Research
Institute for Electronic Science, Hokkaido University, N20, W10, Kita-ku,
Sapporo 001-0020, Japan
| | - Kenji Matsuda
- Department
of Synthetic Chemistry and Biological Chemistry, Graduate School of
Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Seiya Kobatake
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558-8585, Japan
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20
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Beyond Molecular Conduction: Optical and Thermal Effects in Molecular Junctions. ADVANCES IN CHEMICAL PHYSICS 2014. [DOI: 10.1002/9781118959602.ch12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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21
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Dobryakov AL, Quick M, Ioffe IN, Granovsky AA, Ernsting NP, Kovalenko SA. Excited-state Raman spectroscopy with and without actinic excitation: S1 Raman spectra of trans-azobenzene. J Chem Phys 2014; 140:184310. [DOI: 10.1063/1.4874854] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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22
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Zahedi E, Mozaffari M, Karimi FS, Nouri A. Density functional theory study of electric field effects on the isomerization of a photochromic molecular switch based on 1,2-dithienylethene. CAN J CHEM 2014. [DOI: 10.1139/cjc-2013-0589] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Structural and electronic properties of 1,2-bis(5-methyl-[2,2′-bithiophen]-4-yl)cyclopent-1-ene in closed form and open form under various external electric field with strengths, 0, 10 × 10−4, 20 × 10−4, 30 × 10−4, 40 × 10−4, and 50 × 10−4a.u., were studied using the DFT-B3LYP/6-31G* method. As a positive index, structural parameters, length of the photoisomers, and the electronic spatial extents are almost stable at different external electric fields. The UV-Vis electronic spectrum based on time-dependent density functional theory indicated that the HOMO → LUMO transition in the closed form under different electric field strengths is strongly allowed, whereas is very weak in the open form. Electronic response parameters such as the HOMO−LUMO gap, electric dipole moment, and polarizability showed that electric conductivity of the closed form at different field strengths is greater than in the open form. Results of electronic density of states show that at high external electric field, the conductivity of the open form and closed form will be probably equal and switching behavior cannot be observed. Isomerization of the closed form to the open form at different external electric fields can be considered as exothermic and spontaneous.
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Affiliation(s)
- Ehsan Zahedi
- Chemistry Department, Shahrood Branch, Islamic Azad University, Shahrood, Iran
| | - Majid Mozaffari
- Chemistry Department, Shahrood Branch, Islamic Azad University, Shahrood, Iran
| | | | - Azita Nouri
- Chemistry Department, Shahr-e Qods Branch, Islamic Azad University, Tehran, Iran
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23
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Woywod C, Csehi A, Halász GJ, Ruud K, Vibók Á. Theoretical investigation of two model systems for molecular photoswitch functionality. I. 2-(4-nitropyrimidin-2-yl)ethenol. Mol Phys 2014. [DOI: 10.1080/00268976.2013.869362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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24
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Tsuji Y, Hoffmann R. Frontier Orbital Control of Molecular Conductance and its Switching. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201311134] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Tsuji Y, Hoffmann R. Frontier Orbital Control of Molecular Conductance and its Switching. Angew Chem Int Ed Engl 2014; 53:4093-7. [DOI: 10.1002/anie.201311134] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Revised: 01/27/2014] [Indexed: 11/11/2022]
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26
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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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27
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Zhao J, Zhao W, Cui B, Fang C, Xu Y, Kong X, Li D, Liu D. Electronic transport properties of a dithienylethene-based polymer with different metallic contacts. RSC Adv 2014. [DOI: 10.1039/c4ra06904h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We have studied the electronic transport behaviors of a dithienylethene-based polymer between two metal surfaces using nonequilibrium Green's functions combined with density functional theory.
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Affiliation(s)
- Jingfen Zhao
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100, People's Republic of China
| | - Wenkai Zhao
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100, People's Republic of China
| | - Bin Cui
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100, People's Republic of China
| | - Changfeng Fang
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100, People's Republic of China
| | - Yuqing Xu
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100, People's Republic of China
| | - Xiangru Kong
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100, People's Republic of China
| | - Dongmei Li
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100, People's Republic of China
| | - Desheng Liu
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100, People's Republic of China
- Department of Physics
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28
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Jia C, Wang J, Yao C, Cao Y, Zhong Y, Liu Z, Liu Z, Guo X. Conductance Switching and Mechanisms in Single-Molecule Junctions. Angew Chem Int Ed Engl 2013; 52:8666-70. [DOI: 10.1002/anie.201304301] [Citation(s) in RCA: 140] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Indexed: 11/09/2022]
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29
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Jia C, Wang J, Yao C, Cao Y, Zhong Y, Liu Z, Liu Z, Guo X. Conductance Switching and Mechanisms in Single-Molecule Junctions. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304301] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Van Dyck C, Geskin V, Kronemeijer AJ, de Leeuw DM, Cornil J. Impact of derivatization on electron transmission through dithienylethene-based photoswitches in molecular junctions. Phys Chem Chem Phys 2013; 15:4392-404. [DOI: 10.1039/c3cp44132f] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Csehi A, Illés L, Halász GJ, Vibók Á. The effect of chemical substituents on the functionality of a molecular switch system: a theoretical study of several quinoline compounds. Phys Chem Chem Phys 2013; 15:18048-54. [DOI: 10.1039/c3cp52812j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Spangenberg A, Métivier R, Yasukuni R, Shibata K, Brosseau A, Grand J, Aubard J, Yu P, Asahi T, Nakatani K. Photoswitchable interactions between photochromic organic diarylethene and surface plasmon resonance of gold nanoparticles in hybrid thin films. Phys Chem Chem Phys 2013; 15:9670-8. [DOI: 10.1039/c3cp50770j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Böckmann M, Doltsinis NL, Marx D. Enhanced photoswitching of bridged azobenzene studied by nonadiabatic ab initio simulation. J Chem Phys 2012; 137:22A505. [DOI: 10.1063/1.4733673] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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34
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Kim Y, Hellmuth TJ, Sysoiev D, Pauly F, Pietsch T, Wolf J, Erbe A, Huhn T, Groth U, Steiner UE, Scheer E. Charge transport characteristics of diarylethene photoswitching single-molecule junctions. NANO LETTERS 2012; 12:3736-42. [PMID: 22734823 DOI: 10.1021/nl3015523] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
We report on the experimental analysis of the charge transport through single-molecule junctions of the open and closed isomers of photoswitching molecules. Sulfur-free diarylethene molecules are developed and studied via electrical and optical measurements as well as density functional theory calculations. The single-molecule conductance and the current-voltage characteristics are measured in a mechanically controlled break-junction system at low temperatures. Comparing the results with the single-level transport model, we find an unexpected behavior of the current-dominating molecular orbital upon isomerization. We show that both the side chains and end groups of the molecules are crucial to understand the charge transport mechanism of photoswitching molecular junctions.
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Affiliation(s)
- Youngsang Kim
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
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35
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Tsutsui M, Taniguchi M. Single molecule electronics and devices. SENSORS (BASEL, SWITZERLAND) 2012; 12:7259-98. [PMID: 22969345 PMCID: PMC3435974 DOI: 10.3390/s120607259] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 05/15/2012] [Accepted: 05/17/2012] [Indexed: 11/21/2022]
Abstract
The manufacture of integrated circuits with single-molecule building blocks is a goal of molecular electronics. While research in the past has been limited to bulk experiments on self-assembled monolayers, advances in technology have now enabled us to fabricate single-molecule junctions. This has led to significant progress in understanding electron transport in molecular systems at the single-molecule level and the concomitant emergence of new device concepts. Here, we review recent developments in this field. We summarize the methods currently used to form metal-molecule-metal structures and some single-molecule techniques essential for characterizing molecular junctions such as inelastic electron tunnelling spectroscopy. We then highlight several important achievements, including demonstration of single-molecule diodes, transistors, and switches that make use of electrical, photo, and mechanical stimulation to control the electron transport. We also discuss intriguing issues to be addressed further in the future such as heat and thermoelectric transport in an individual molecule.
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Affiliation(s)
- Makusu Tsutsui
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan; E-Mail:
| | - Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan; E-Mail:
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36
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Meng S, Ma J. Solvent Effects on Isomerization and Spectral Properties of Photochromic-Switching Diarythene Derivatives in Polar and Apolar Solutions. J Phys Chem A 2012; 116:913-23. [DOI: 10.1021/jp210846b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Suci Meng
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, People’s Republic of China
| | - Jing Ma
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, People’s Republic of China
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37
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Meng F, Hervault YM, Norel L, Costuas K, Van Dyck C, Geskin V, Cornil J, Hng HH, Rigaut S, Chen X. Photo-modulable molecular transport junctions based on organometallic molecular wires. Chem Sci 2012. [DOI: 10.1039/c2sc20323e] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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38
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Galperin M, Nitzan A. Molecular optoelectronics: the interaction of molecular conduction junctions with light. Phys Chem Chem Phys 2012; 14:9421-38. [PMID: 22648067 DOI: 10.1039/c2cp40636e] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Michael Galperin
- Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, CA 92093, USA
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39
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Cai Y, Zhang A, Ping Feng Y, Zhang C. Switching and rectification of a single light-sensitive diarylethene molecule sandwiched between graphene nanoribbons. J Chem Phys 2011; 135:184703. [DOI: 10.1063/1.3657435] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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40
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Perissinotto S, Garbugli M, Fazzi D, Bertarelli C, Carvelli M, Srimath Kandada AR, Yue Z, Wong KS, Lanzani G. Optical Modulation of Amplified Emission in a Polyfluorene-Diarylethene Blend. Chemphyschem 2011; 12:3619-23. [DOI: 10.1002/cphc.201100480] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Indexed: 11/11/2022]
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41
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Fuentes N, Martín-Lasanta A, Alvarez de Cienfuegos L, Ribagorda M, Parra A, Cuerva JM. Organic-based molecular switches for molecular electronics. NANOSCALE 2011; 3:4003-4014. [PMID: 21904756 DOI: 10.1039/c1nr10536a] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In a general sense, molecular electronics (ME) is the branch of nanotechnology which studies the application of molecular building blocks for the fabrication of electronic components. Among the different types of molecules, organic compounds have been revealed as promising candidates for ME, due to the easy access, great structural diversity and suitable electronic and mechanical properties. Thanks to these useful capabilities, organic molecules have been used to emulate electronic devices at the nanoscopic scale. In this feature article, we present the diverse strategies used to develop organic switches towards ME with special attention to non-volatile systems.
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Affiliation(s)
- Noelia Fuentes
- Departamento de Química Orgánica, Universidad de Granada, Campus Fuentenueva s/n, E-18071, Granada, Spain
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42
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Molecular electronic junction transport: some pathways and some ideas. Top Curr Chem (Cham) 2011. [PMID: 21915776 DOI: 10.1007/128_2011_227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
When a single molecule, or a collection of molecules, is placed between two electrodes and voltage is applied, one has a molecular transport junction. We discuss such junctions, their properties, their description, and some of their applications. The discussion is qualitative rather than quantitative, and focuses on mechanism, structure/function relations, regimes and mechanisms of transport, some molecular regularities, and some substantial challenges facing the field. Because there are many regimes and mechanisms in transport junctions, we will discuss time scales, geometries, and inelastic scattering methods for trying to determine the properties of molecules within these junctions. Finally, we discuss some device applications, some outstanding problems, and some future directions.
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43
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Tam ES, Parks JJ, Shum WW, Zhong YW, Santiago-Berríos MB, Zheng X, Yang W, Chan GKL, Abruña HD, Ralph DC. Single-molecule conductance of pyridine-terminated dithienylethene switch molecules. ACS NANO 2011; 5:5115-23. [PMID: 21574612 DOI: 10.1021/nn201199b] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We have investigated the conductance of individual optically switchable dithienylethene molecules in both their conducting closed configuration and nonconducting open configuration, using the technique of repeatedly formed break-junctions. We employed pyridine groups to link the molecules to gold electrodes in order to achieve relatively well-defined molecular contacts and stable conductance. For the closed form of each molecule, we observed a peak in the conductance histogram constructed without any data selection, allowing us to determine the conductance of the fully stretched molecules. For two different dithienylethene derivatives, these closed-configuration conductances were (3.3 ± 0.5) × 10(-5)G(0) and (1.5 ± 0.5) × 10(-6)G(0), where G(0) is the conductance quantum. For the open configuration of the molecules, the existence of electrical conduction via the molecule was evident in traces of conductance versus junction displacement, but the conductance of the fully stretched molecules was less than the noise floor of our measurement. We can set a lower limit of 30 for the on/off ratio for the simplest dithienylethene derivative we have investigated. Density functional theory calculations predict an on/off ratio consistent with this result.
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Affiliation(s)
- Eugenia S Tam
- Laboratory of Atomic and Solid State Physics, Kavli Institute at Cornell, Cornell University, Ithaca, New York 14853, United States
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44
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Ashraf MK, Bruque NA, Tan JL, Beran GJO, Lake RK. Conductance switching in diarylethenes bridging carbon nanotubes. J Chem Phys 2011; 134:024524. [DOI: 10.1063/1.3528118] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Wang G, Kim TW, Lee T. Electrical transport characteristics through molecular layers. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12702k] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Lilly GD, Whalley AC, Grunder S, Valente C, Frederick MT, Stoddart JF, Weiss EA. Switchable photoconductivity of quantum dot films using cross-linking ligands with light-sensitive structures. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm04397d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Pakula C, Zaporojtchenko V, Strunskus T, Zargarani D, Herges R, Faupel F. Reversible light-controlled conductance switching of azobenzene-based metal/polymer nanocomposites. NANOTECHNOLOGY 2010; 21:465201. [PMID: 20972322 DOI: 10.1088/0957-4484/21/46/465201] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present a new concept of light-controlled conductance switching based on metal/polymer nanocomposites with dissolved chromophores that do not have intrinsic current switching ability. Photoswitchable metal/PMMA nanocomposites were prepared by physical vapor deposition of Au and Pt clusters, respectively, onto spin-coated thin poly(methylmethacrylate) films doped with azo-dye molecules. High dye concentrations were achieved by functionalizing the azo groups with tails and branches, thus enhancing solubility. The composites show completely reversible optical switching of the absorption bands upon alternating irradiation with UV and blue light. We also demonstrate reversible light-controlled conductance switching. This is attributed to changes in the metal cluster separation upon isomerization based on model experiments where analogous conductance changes were induced by swelling of the composite films in organic vapors and by tensile stress.
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Affiliation(s)
- Christina Pakula
- Institut für Materialwissenschaft-Materialverbunde, Technische Fakultät der Christian-Albrechts-Universität zu Kiel, Kiel, Germany
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48
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Odell A, Delin A, Johansson B, Rungger I, Sanvito S. Investigation of the conducting properties of a photoswitching dithienylethene molecule. ACS NANO 2010; 4:2635-2642. [PMID: 20411946 DOI: 10.1021/nn100217r] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Photoswitching molecules are attractive candidates as organic materials for optoelectronics applications because light impulses can switch them between states with different conducting characteristics. Here, we report a fully self-consistent density functional theory calculation of the electron transport properties of photoswitching dithienylethene attached to Au leads in both the open and closed conformations. The molecule is found to be a good conductor in both conformations, with the low-bias current for the closed one being about 20 times larger than that of the open. Importantly, the current-voltage characteristics away from the linear response are largely determined by molecular orbital rehybridization in an electric field, in close analogy to what happens for Mn(12) molecules. However, in the case of dithienylethene attached to Au, such a mechanism is effective also in conditions of strong electronic coupling to the electrodes. This makes the dithienylethene family an intriguing materials platform for constructing highly conducting organic optoelectronics switches.
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Affiliation(s)
- Anders Odell
- Applied Materials Physics, Department of Materials Science and Engineering, Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
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49
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Jan van der Molen S, Liljeroth P. Charge transport through molecular switches. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:133001. [PMID: 21389503 DOI: 10.1088/0953-8984/22/13/133001] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We review the fascinating research on charge transport through switchable molecules. In the past decade, detailed investigations have been performed on a great variety of molecular switches, including mechanically interlocked switches (rotaxanes and catenanes), redox-active molecules and photochromic switches (e.g. azobenzenes and diarylethenes). To probe these molecules, both individually and in self-assembled monolayers (SAMs), a broad set of methods have been developed. These range from low temperature scanning tunneling microscopy (STM) via two-terminal break junctions to larger scale SAM-based devices. It is generally found that the electronic coupling between molecules and electrodes has a profound influence on the properties of such molecular junctions. For example, an intrinsically switchable molecule may lose its functionality after it is contacted. Vice versa, switchable two-terminal devices may be created using passive molecules ('extrinsic switching'). Developing a detailed understanding of the relation between coupling and switchability will be of key importance for both future research and technology.
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50
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Yu C, Wang H. Light-induced bipolar-resistance effect based on metal-oxide-semiconductor structures of Ti/SiO(2)/Si. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:966-970. [PMID: 20217821 DOI: 10.1002/adma.200903070] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Chongqi Yu
- Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
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