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Petrov EG, Robert B, Lin SH, Valkunas L. Theory of Triplet Excitation Transfer in the Donor-Oxygen-Acceptor System: Application to Cytochrome b6f. Biophys J 2016; 109:1735-45. [PMID: 26488665 DOI: 10.1016/j.bpj.2015.08.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 06/28/2015] [Accepted: 08/17/2015] [Indexed: 11/28/2022] Open
Abstract
Theoretical consideration is presented of the triplet excitation dynamics in donor-acceptor systems in conditions where the transfer is mediated by an oxygen molecule. It is demonstrated that oxygen may be involved in both real and virtual intramolecular triplet-singlet conversions in the course of the process under consideration. Expressions describing a superexchange donor-acceptor coupling owing to a participation of the bridging twofold degenerate oxygen's virtual singlet state are derived and the transfer kinetics including the sequential (hopping) and coherent (distant) routes are analyzed. Applicability of this theoretical description to the pigment-protein complex cytochrome b6f, by considering the triplet excitation transfer from the chlorophyll a molecule to distant β-carotene, is discussed.
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Affiliation(s)
- Elmar G Petrov
- Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Kiev, Ukraine
| | - Bruno Robert
- Nuclear Research Center Saclay, UMR 8221 Centre National de la Recherche Scientifique, Institut de Biologie et de Technologie de Saclay, University Paris Sud, Gif sur Yvette, France
| | | | - Leonas Valkunas
- Theoretical Physics Department, Vilnius University, Vilnius, Lithuania; Center for Physical Sciences and Technology, Vilnius, Lithuania.
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Rahimi E, Nejad SM. Quasi-classical modeling of molecular quantum-dot cellular automata multidriver gates. NANOSCALE RESEARCH LETTERS 2012; 7:274. [PMID: 22647345 PMCID: PMC3492122 DOI: 10.1186/1556-276x-7-274] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 04/25/2012] [Indexed: 06/01/2023]
Abstract
Molecular quantum-dot cellular automata (mQCA) has received considerable attention in nanoscience. Unlike the current-based molecular switches, where the digital data is represented by the on/off states of the switches, in mQCA devices, binary information is encoded in charge configuration within molecular redox centers. The mQCA paradigm allows high device density and ultra-low power consumption. Digital mQCA gates are the building blocks of circuits in this paradigm. Design and analysis of these gates require quantum chemical calculations, which are demanding in computer time and memory. Therefore, developing simple models to probe mQCA gates is of paramount importance. We derive a semi-classical model to study the steady-state output polarization of mQCA multidriver gates, directly from the two-state approximation in electron transfer theory. The accuracy and validity of this model are analyzed using full quantum chemistry calculations. A complete set of logic gates, including inverters and minority voters, are implemented to provide an appropriate test bench in the two-dot mQCA regime. We also briefly discuss how the QCADesigner tool could find its application in simulation of mQCA devices.
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Affiliation(s)
- Ehsan Rahimi
- Nanoptronics Research Center, School of Electrical and Electronic Engineering, Iran University of Science and Technology, Tehran, 16844, Iran
| | - Shahram Mohammad Nejad
- Nanoptronics Research Center, School of Electrical and Electronic Engineering, Iran University of Science and Technology, Tehran, 16844, Iran
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Lin BC, Cheng CP, You ZQ, Hsu CP. Charge transport properties of tris(8-hydroxyquinolinato)aluminum(III): why it is an electron transporter. J Am Chem Soc 2005; 127:66-7. [PMID: 15631451 DOI: 10.1021/ja045087t] [Citation(s) in RCA: 232] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The charge transport properties of mer-tris(8-hydroxyquinolinato)aluminum(III) (mer-Alq), which is the most widely used electron transport material in OLED, were investigated by quantum chemistry calculations within the framework of the charge hopping model and Marcus electron transfer theory. Internal reorganization energies of 0.276 and 0.242 eV were calculated by the DFT-B3LYP method employing a 6-31 G* basis set for the electrons lambdai(e) and holes lambdai(h), respectively. The relative distances and orientations of Alq molecules in amorphous film were simulated by those in the beta-phase. The intermolecular charge-transfer integrals, Hda(h) and Hda(e), along all 14 hopping pathways were then calculated by the Koopmans Theorem in conjunction with the Hartree-Fock method employing a 6-31 G* basis set as well as by the direct coupling method. The results showed that there were some Hda(e) that were 1 order of magnitude larger than any Hda(h), because hopping pathways with effective overlaps of LUMOs can occur and, thus, large Hda(e). On the other hand, effective overlap of HOMO was absent in all pathways, resulting in a relatively small Hda(h). This difference in the magnitudes of Hda(e) and Hda(h) would predict a 2 orders of magnitude difference in the electron-transfer rate constants and account for the observed 2 orders of magnitude difference in the mobilities of electrons and holes.
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Affiliation(s)
- Bo Chao Lin
- Department of Chemistry, National Tsing Hua University, Kuang-Fu Road, Hsinchu, 300, Taiwan
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O-Trimethylsilylenol ethers as versatile building blocks in a modular preparation of polyenic backbone. Tetrahedron 2004. [DOI: 10.1016/j.tet.2003.12.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Medvedev E, Stuchebrukhov A. Breakdown of the Born–Oppenheimer–Condon–Marcus approximation in long distance electron transfer. Chem Phys 2004. [DOI: 10.1016/j.chemphys.2003.09.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Paddon-Row MN. Orbital interactions and long-range electron transfer. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 2003. [DOI: 10.1016/s0065-3160(03)38001-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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Modelli A, Venuti M, Szepes L. Intramolecular electron transfer in heterosubstituted benzene derivatives as probed by dissociative electron attachment. J Am Chem Soc 2002; 124:8498-504. [PMID: 12105932 DOI: 10.1021/ja0203768] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The electron transmission and dissociative electron attachment spectra of the 1-chloroalkyl benzene derivatives, C(6)H(5)(CH(2))(3)Cl and C(6)H(5)(CH(2))(4)Cl, and of the sulfur and silicon derivatives, C(6)H(5)SCH(2)Cl, C(6)H(5)Si(CH(3))(2)CH(2)Cl and C(6)H(5)CH(2)Si(CH(3))(2)CH(2)Cl, are presented for the first time. The relative Cl(-) fragment anion currents generated by electron attachment to the benzene pi* LUMO are measured in the series C(6)H(5)(CH(2))(n)Cl, with n = 1-4, and in the heteroatomic compounds. The Cl(-) yield reflects the rate of intramolecular electron transfer between the pi-system and the remote chlorine atom, which in turn depends on the extent of through-bond coupling between the localized pi* and sigma*(Cl-C) orbitals. In compounds C(6)H(5)(CH(2))(n)Cl the Cl(-) current rapidly decreases with increasing length of the saturated chain. This decrease is significantly attenuated when a carbon atom of the alkyl skeleton is replaced with a third-row heteroatom. This greater ability to promote through-bond coupling between the pi* and sigma*(Cl-C) orbitals is attributed to the sizably lower energy of the empty sigma*(S-C) and sigma*(Si-C) orbitals with respect to the sigma*(C-C) orbitals. In the sulfur derivative the increase of the Cl(-) current is larger than in the silicon analogue. In this case, however, other negative fragments are observed, due to dissociation of the S-C bonds.
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Affiliation(s)
- Alberto Modelli
- Dipartimento di Chimica G. Ciamician, Università di Bologna, via Selmi 2, 40126 Bologna, Italy.
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Endtner JM, Effenberger F, Hartschuh A, Port H. Optical ON/OFF Switching of Intramolecular Photoinduced Charge Separation in a Donor−Bridge−Acceptor System Containing Dithienylethene. J Am Chem Soc 2000. [DOI: 10.1021/ja9938736] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jochen M. Endtner
- Contribution from the Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, and 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
| | - Franz Effenberger
- Contribution from the Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, and 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
| | - Achim Hartschuh
- Contribution from the Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, and 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
| | - Helmut Port
- Contribution from the Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, and 3. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, Germany
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de Sousa Moreira I, Batista de Lima J, Wagner Franco D. Manifestation of sulfur-to-sulfur interaction in complexes of iron, ruthenium and osmium. Coord Chem Rev 2000. [DOI: 10.1016/s0010-8545(99)00219-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Structural-dynamic approach and path analysis of the intramolecular electron transfer in the bridged complexes [(NH3)5Ru-py-(C2H2) n -py-Ru(NH3)5]5+ withn = 0,1,2,3. J STRUCT CHEM+ 1999. [DOI: 10.1007/bf02903644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Onipko A, Klymenko Y. Nonadiabatic Electron Transfer: Exact Analytical Expression of through-Conjugated-Bridge Effective Coupling and Its Asymptotics and Zeros. J Phys Chem A 1998. [DOI: 10.1021/jp9731359] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Onipko
- IFM, Linköping University, S-581 83 Linköping, Sweden, and Space Research Institute, Kiev 252022, Ukraine
| | - Yuriy Klymenko
- IFM, Linköping University, S-581 83 Linköping, Sweden, and Space Research Institute, Kiev 252022, Ukraine
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Onipko A, Klymenko Y, Malysheva L. Analytical one-particle approach to the π electronic structure of heterocyclic polymers. J Chem Phys 1997. [DOI: 10.1063/1.474867] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Braga M. Correlation effects in the long-range coupling between acetylenic π-electrons in a series of α,ω-diethynyl[n]staffanes (n = 1–5). Chem Phys 1996. [DOI: 10.1016/s0301-0104(96)00280-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Warman JM, Schouten PG. Charge Transport in Mesomorphic Phthalocyanines Studied by Pulse-Radiolysis Time-Resolved Microwave Conductivity. Appl Organomet Chem 1996. [DOI: 10.1002/(sici)1099-0739(199610)10:8<637::aid-aoc524>3.0.co;2-u] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Suzuki YY, Beljonne D, Brédas JL. Two‐band tight‐binding model for push–pull polyenes. J Chem Phys 1996. [DOI: 10.1063/1.471394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Silinsh E, Klimkāns A, Larsson S, Čápek V. Molecular polaron states in polyacene crystals. Formation and transfer processes. Chem Phys 1995. [DOI: 10.1016/0301-0104(95)00151-d] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Petrov E, Tolokh I, Demidenko A, Gorbach V. Electron-transfer properties of quantum molecular wires. Chem Phys 1995. [DOI: 10.1016/0301-0104(95)00426-o] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mujica V, Kemp M, Ratner MA. Electron conduction in molecular wires. II. Application to scanning tunneling microscopy. J Chem Phys 1994. [DOI: 10.1063/1.468315] [Citation(s) in RCA: 215] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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