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Dhingra A, Hu X, Borunda MF, Johnson JF, Binek C, Bird J, N'Diaye AT, Sutter JP, Delahaye E, Switzer ED, Barco ED, Rahman TS, Dowben PA. Molecular transistors as substitutes for quantum information applications. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:441501. [PMID: 35998608 DOI: 10.1088/1361-648x/ac8c11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 08/23/2022] [Indexed: 06/15/2023]
Abstract
Applications of quantum information science (QIS) generally rely on the generation and manipulation of qubits. Still, there are ways to envision a device with a continuous readout, but without the entangled states. This concise perspective includes a discussion on an alternative to the qubit, namely the solid-state version of the Mach-Zehnder interferometer, in which the local moments and spin polarization replace light polarization. In this context, we provide some insights into the mathematics that dictates the fundamental working principles of quantum information processes that involve molecular systems with large magnetic anisotropy. Transistors based on such systems lead to the possibility of fabricating logic gates that do not require entangled states. Furthermore, some novel approaches, worthy of some consideration, exist to address the issues pertaining to the scalability of quantum devices, but face the challenge of finding the suitable materials for desired functionality that resemble what is sought from QIS devices.
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Affiliation(s)
- Archit Dhingra
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588-0299, United States of America
| | - Xuedong Hu
- Department of Physics, University at Buffalo, Buffalo, NY, 14260-1500, United States of America
| | - Mario F Borunda
- Department of Physics, Oklahoma State University, Stillwater, OK 74078, United States of America
| | - Joseph F Johnson
- Department of Mathematics & Statistics, Villanova University, 800 E. Lancaster Ave., Villanova, PA 19085, United States of America
| | - Christian Binek
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588-0299, United States of America
- Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE 68588-0299, United States of America
| | - Jonathan Bird
- Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, NY, 14260-1900, United States of America
| | - Alpha T N'Diaye
- Advanced Light Source (ALS, BL631), Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States of America
| | - Jean-Pascal Sutter
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, F-31000 Toulouse, France
| | - Emilie Delahaye
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, F-31000 Toulouse, France
| | - Eric D Switzer
- Department of Physics, University of Central Florida, Orlando, FL 32816, United States of America
| | - Enrique Del Barco
- Department of Physics, University of Central Florida, Orlando, FL 32816, United States of America
| | - Talat S Rahman
- Department of Physics, University of Central Florida, Orlando, FL 32816, United States of America
| | - Peter A Dowben
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588-0299, United States of America
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2
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Lloveras V, Elías-Rodríguez P, Bursi L, Shirdel E, Goñi AR, Calzolari A, Vidal-Gancedo J. Multifunctional Switch Based on Spin-Labeled Gold Nanoparticles. NANO LETTERS 2022; 22:768-774. [PMID: 35078323 DOI: 10.1021/acs.nanolett.1c04294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The fabrication of multifunctional switches is a fundamental step in the development of nanometer-scale molecular spintronic devices. The anchoring of active organic radicals on gold nanoparticles (AuNPs) surface is little studied and the realization of AuNPs-based switches remains extremely challenging. We report the first demonstration of a surface molecular switch based on AuNPs decorated with persistent perchlorotriphenylmethyl (PTM) radicals. The redox properties of PTM are exploited to fabricate electrochemical switches with optical and magnetic responses, showing high stability and reversibility. Electronic interaction between the radicals and the gold surface is investigated by UV-vis, showing a very broad absorption band in the near-infrared (NIR) region, which becomes more intense when PTMs are reduced to anionic phase. By using multiple experimental techniques, we demonstrate that this interaction is likely favored by the preferentially flat orientation of PTM ligands on the metallic NP surface, as confirmed by first-principles simulations.
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Affiliation(s)
- Vega Lloveras
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Catalonia Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), E-08193 Barcelona, Spain
| | - Pilar Elías-Rodríguez
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Catalonia Spain
| | - Luca Bursi
- CNR-NANO Istituto Nanoscienze, Centro S3, I-41125 Modena, Italy
| | - Ehsan Shirdel
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Catalonia Spain
| | - Alejandro R Goñi
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Catalonia Spain
- ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain
| | | | - José Vidal-Gancedo
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Catalonia Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), E-08193 Barcelona, Spain
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3
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Cuesta V, Singhal R, de la Cruz P, Sharma GD, Langa F. Reducing Energy Loss in Organic Solar Cells by Changing the Central Metal in Metalloporphyrins. CHEMSUSCHEM 2021; 14:3494-3501. [PMID: 33274829 DOI: 10.1002/cssc.202002664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/03/2020] [Indexed: 06/12/2023]
Abstract
The effect of central donor core on the properties of A-π-D-π-A donors, where D is a porphyrin macrocycle, cyclopenta[2,1-b:3,4-b']dithiophene is the π bridge, and A is a dicyanorhodanine terminal unit, was investigated for the fabrication of the organic solar cells (OSCs), along [6,6]-phenyl-C71-butyric acid methyl ester (PC71 BM) as electron acceptor. A new molecule consisting of Ni-porphyrin central donor core (VC9) showed deep HOMO energy level and OSCs based on optimized VC9:PC71 BM realized overall power conversion efficiency (PCE) of 10.66 % [short-circuit current density (JSC )=15.48 mA/cm2 , fill factor (FF)=0.65] with high open circuit voltage (VOC ) of 1.06 V and very low energy loss of 0.49 eV, whereas the Zn-porphyrin analogue VC8:PC71 BM showed PCE of 9.69 % with VOC of 0.89 V, JSC of 16.25 mA/cm2 and FF of 0.67. Although the OSCs based on VC8 showed higher JSC in comparison to VC9, originating from the broader absorption profile of VC8 that led to more exciton generation, the higher value of PCE of VC9 is owing to the higher VOC and reduced energy loss.
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Affiliation(s)
- Virginia Cuesta
- Department of inorganic, organic and biochemistry, Universidad de Castilla - La Mancha, Institute of Nanoscience, Nanotechnology and Molecular Materials (INAMOL), Campus de la Fábrica de Armas, Toledo, Spain
| | - Rahul Singhal
- Department of Physics, Malviya National Institute of Technology, JLN Marg, Jaipur (Raj.), 302017, India
| | - Pilar de la Cruz
- Department of inorganic, organic and biochemistry, Universidad de Castilla - La Mancha, Institute of Nanoscience, Nanotechnology and Molecular Materials (INAMOL), Campus de la Fábrica de Armas, Toledo, Spain
| | - Ganesh D Sharma
- Department of Physics, The LNM Institute of Information Technology, Deemed University, Rupa ki Nangal, Jamdoli, Jaipur (Raj.), 302031, India
| | - Fernando Langa
- Department of inorganic, organic and biochemistry, Universidad de Castilla - La Mancha, Institute of Nanoscience, Nanotechnology and Molecular Materials (INAMOL), Campus de la Fábrica de Armas, Toledo, Spain
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4
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Mayorga-Burrezo P, Bejarano F, Calbo J, Zhao X, De Sousa JA, Lloveras V, Bryce MR, Ortí E, Veciana J, Rovira C, Crivillers N. Allocation of Ambipolar Charges on an Organic Diradical with a Vinylene-Phenylenediyne Bridge. J Phys Chem Lett 2021; 12:6159-6164. [PMID: 34184906 DOI: 10.1021/acs.jpclett.1c01565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two redox and magnetically active perchlorotriphenylmethyl (•PTM) radical units have been connected as end-capping groups to a bis(phenylene)diyne chain through vinylene linkers. Negative and positive charged species have been generated, and the influence of the bridge on their stabilization is discussed. Partial reduction of the electron-withdrawing •PTM radicals results in a class-II mixed-valence system with the negative charge located on the terminal PTM units, proving the efficiency of the conjugated chain for the electron transport between the two terminal sites. Counterintuitively, the oxidation process does not occur along the electron-rich bridge but on the vinylene units. The •PTM radicals play a key role in the stabilization of the cationic species, promoting the generation of quinoidal ring segments.
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Affiliation(s)
- Paula Mayorga-Burrezo
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
| | - Francesc Bejarano
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
| | - Joaquín Calbo
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Xiaotao Zhao
- Chemistry Department, Durham University, Durham DH1 3LE, United Kingdom
| | - J Alejandro De Sousa
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
- Laboratorio de Electroquímica, Departamento de Química, Facultad de Ciencias, Universidad de los Andes, 5101 Mérida, Venezuela
| | - Vega Lloveras
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
| | - Martin R Bryce
- Chemistry Department, Durham University, Durham DH1 3LE, United Kingdom
| | - Enrique Ortí
- Instituto de Ciencia Molecular, Universidad de Valencia, Catedrático José Beltrán, 2, 46980 Paterna, Spain
| | - Jaume Veciana
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
| | - Concepció Rovira
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
| | - Núria Crivillers
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
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5
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Liu K, Marin L, Xiao L, Cheng X. Fluorescent multi-component polymer sensors for the sensitive and selective detection of Hg 2+/Hg + ions via dual mode fluorescence and colorimetry. NEW J CHEM 2021. [DOI: 10.1039/d1nj04286f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Fluorescent multi-component polymers, which are sensitive and selective to Hg2+/Hg+ through fluorescence and colorimetry, were synthesized by the Heck coupling reaction.
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Affiliation(s)
- Kaiqi Liu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430073, China
| | - Luminita Marin
- Petru Poni’’ Institute of Macromolecular Chemistry of Romanian Academy, Iasi, Romania
| | - Li Xiao
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430073, China
| | - Xinjian Cheng
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430073, China
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6
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Rafiq M, Jing J, Liang Y, Hu Z, Zhang X, Tang H, Tian L, Li Y, Huang F. A pyridinium-pended conjugated polyelectrolyte for efficient photocatalytic hydrogen evolution and organic solar cells. Polym Chem 2021. [DOI: 10.1039/d0py01351j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A pyridinium-pended conjugated polyelectrolyte with photo-induced amine doping behaviour was designed for multiple applications.
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Affiliation(s)
- Muhammad Rafiq
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- State Key Laboratory of Pulp and Paper Engineering
- School of Chemistry and Chemical Engineering
- South China University of Technology
| | - Jianhua Jing
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- State Key Laboratory of Pulp and Paper Engineering
- School of Chemistry and Chemical Engineering
- South China University of Technology
| | - Yuanying Liang
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- State Key Laboratory of Pulp and Paper Engineering
- School of Chemistry and Chemical Engineering
- South China University of Technology
| | - Zhicheng Hu
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- State Key Laboratory of Pulp and Paper Engineering
- School of Chemistry and Chemical Engineering
- South China University of Technology
| | - Xi Zhang
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- State Key Laboratory of Pulp and Paper Engineering
- School of Chemistry and Chemical Engineering
- South China University of Technology
| | - Haoran Tang
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- State Key Laboratory of Pulp and Paper Engineering
- School of Chemistry and Chemical Engineering
- South China University of Technology
| | - Li Tian
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- State Key Laboratory of Pulp and Paper Engineering
- School of Chemistry and Chemical Engineering
- South China University of Technology
| | - Yingwei Li
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- State Key Laboratory of Pulp and Paper Engineering
- School of Chemistry and Chemical Engineering
- South China University of Technology
| | - Fei Huang
- Institute of Polymer Optoelectronic Materials and Devices
- State Key Laboratory of Luminescent Materials and Devices
- State Key Laboratory of Pulp and Paper Engineering
- School of Chemistry and Chemical Engineering
- South China University of Technology
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7
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Abdurahman A, Hele TJH, Gu Q, Zhang J, Peng Q, Zhang M, Friend RH, Li F, Evans EW. Understanding the luminescent nature of organic radicals for efficient doublet emitters and pure-red light-emitting diodes. NATURE MATERIALS 2020; 19:1224-1229. [PMID: 32541936 DOI: 10.1038/s41563-020-0705-9] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
The doublet-spin nature of radical emitters is advantageous for applications in organic light-emitting diodes, as it avoids the formation of triplet excitons that limit the electroluminescence efficiency of non-radical emitters. However, radicals generally show low optical absorption and photoluminescence yields. Here we explain the poor optical properties of radicals based on alternant hydrocarbons, and establish design rules to increase the absorption and luminescence yields for donor-acceptor-type radicals. We show that non-alternant systems are necessary to lift the degeneracy of the lowest energy orbital excitations; moreover, intensity borrowing from an intense high-lying transition by the low-energy charge-transfer excitation enhances the oscillator strength of the emitter. We apply these rules to design tris(2,4,6-trichlorophenyl)methyl-pyridoindolyl derivatives with a high photoluminescence quantum yield (>90%). Organic light-emitting diodes based on these molecules showed a pure-red emission with an over 12% external quantum efficiency. These insights may be beneficial for the rational design and discovery of highly luminescent doublet emitters.
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Affiliation(s)
- Alim Abdurahman
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, P. R. China
| | | | - Qinying Gu
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Jiangbin Zhang
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Qiming Peng
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, P. R. China
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, P. R. China
| | - Ming Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, P. R. China
| | | | - Feng Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, P. R. China.
- Cavendish Laboratory, University of Cambridge, Cambridge, UK.
| | - Emrys W Evans
- Cavendish Laboratory, University of Cambridge, Cambridge, UK.
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8
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Kröncke S, Herrmann C. Toward a First-Principles Evaluation of Transport Mechanisms in Molecular Wires. J Chem Theory Comput 2020; 16:6267-6279. [PMID: 32886502 DOI: 10.1021/acs.jctc.0c00667] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Understanding charge transport through molecular wires is important for nanoscale electronics and biochemistry. Our goal is to establish a simple first-principles protocol for predicting the charge transport mechanism in such wires, in particular the crossover from coherent tunneling for short wires to incoherent hopping for longer wires. This protocol is based on a combination of density functional theory with a polarizable continuum model introduced by Kaupp et al. for mixed-valence molecules, which we had previously found to work well for length-dependent charge delocalization in such systems. We combine this protocol with a new charge delocalization measure tailored for molecular wires, and we show that it can predict the tunneling-to-hopping transition length with a maximum error of one subunit in five sets of molecular wires studied experimentally in molecular junctions at room temperature. This suggests that the protocol is also well suited for estimating the extent of hopping sites as relevant, for example, for the intermediate tunneling-hopping regime in DNA.
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Affiliation(s)
- Susanne Kröncke
- Department of Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
| | - Carmen Herrmann
- Department of Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
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9
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Tahara K, Abe M. Stimuli-responsive Mixed-valence Architectures: Synthetic Design and Interplay between Mobile and Introduced Charges. CHEM LETT 2020. [DOI: 10.1246/cl.200069] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Keishiro Tahara
- Department of Material Science, Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Masaaki Abe
- Department of Material Science, Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
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10
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Tavakol H, Ranjbari MA, Jafari-Chermahini MT. Mechanistic details for the reaction of methyl acrylate radical anion: a DFT study. REACTION KINETICS MECHANISMS AND CATALYSIS 2019. [DOI: 10.1007/s11144-019-01647-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Tahara K, Terashita N, Tokunaga K, Yabumoto S, Kikuchi JI, Ozawa Y, Abe M. Zwitterionic Mixed Valence: Internalizing Counteranions into a Biferrocenium Framework toward Molecular Expression of Half-Cells in Quantum Cellular Automata. Chemistry 2019; 25:13728-13738. [PMID: 31376186 DOI: 10.1002/chem.201902840] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 07/26/2019] [Indexed: 01/26/2023]
Abstract
Realization of molecular quantum cellular automata (QCA), a promising architecture for molecular computing through current-free processes, requires improved understanding and application of mixed-valence (MV) molecules. In this report, we present an electrostatic approach to creating MV subspecies through internalizing opposite charges in close proximity to MV ionic moieties. This approach is demonstrated by unsymmetrically attaching a charge-responsive boron substituent to a well-known organometallic MV complex, biferrocenium. Guest anions (CN- and F- ) bind to the Lewis acidic boron center, leading to unusual blue-shifts of the intervalence charge-transfer (IVCT) bands. To the best of our knowledge, this is the first reported example of a zwitterionic MV series in which the degree of positive charge delocalization can be varied by changing the bound anions, and serves to clarify the interplay between IVCT parameters. The key underlying factor is the variable zero-level energy difference in the MV states. This work provides new insight into imbuing MV molecules with external charge-responsiveness, a prerequisite of molecular QCA techniques.
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Affiliation(s)
- Keishiro Tahara
- Department of Material Science, Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako, Hyogo, 678-1297, Japan
| | - Nazuna Terashita
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma, Nara, 630-0192, Japan
| | - Ken Tokunaga
- Division of Liberal Arts, Centre for Promotion of Higher Education, Kogakuin University, 2665-1, Nakano, Hachioji, Tokyo, 192-0015, Japan
| | - Shiomi Yabumoto
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma, Nara, 630-0192, Japan
| | - Jun-Ichi Kikuchi
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma, Nara, 630-0192, Japan
| | - Yoshiki Ozawa
- Department of Material Science, Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako, Hyogo, 678-1297, Japan
| | - Masaaki Abe
- Department of Material Science, Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako, Hyogo, 678-1297, Japan
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12
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Tahara K, Koyama H, Fujitsuka M, Tokunaga K, Lei X, Majima T, Kikuchi JI, Ozawa Y, Abe M. Charge-Separated Mixed Valency in an Unsymmetrical Acceptor-Donor-Donor Triad Based on Diarylboryl and Triarylamine Units. J Org Chem 2019; 84:8910-8920. [PMID: 31072099 DOI: 10.1021/acs.joc.9b00836] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we report the generation of new mixed-valence (MV) subspecies with charge-separated (CS) characters from an unsymmetrical acceptor-donor-donor (A-D-D) triad. The triad was synthesized by attaching a dimesitylboryl group (A) to a D-D conjugate that consisted of triarylamine (NAr3) units. The MV radical cation, obtained by chemical oxidation of the triad, exhibited a strong intervalence charge transfer (IVCT) absorption derived from the bis(NAr3)•+ moiety in the near-IR region. The charge-separated MV (CSMV) state, obtained by photoexcitation of the triad, caused a blue shift in IVCT energy in the femtosecond transient absorption spectra, reflecting a bias of positive charge distributions to the D end site. This resulted from increased electron density at the A site and restructuring of the central D site from NAr3 to NAr2 sites. Interestingly, any shift in the IVCT energy that was caused by the polarity of the solvent was minimal, reflecting the unique characteristics of the CSMV state. These findings represent the first detailed analysis of the CSMV state, including a comparison with conventional MV states. Therefore, this work provides new insights into counterion-free MV systems and their applications in molecular devices.
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Affiliation(s)
- Keishiro Tahara
- Department of Material Science and Research Center for New Functional Materials, Graduate School of Material Science , University of Hyogo , 3-2-1, Kouto , Kamigori, Ako , Hyogo 678-1297 , Japan
| | - Haruya Koyama
- Graduate School of Materials Science , Nara Institute of Science and Technology , 8916-5, Takayama , Ikoma, Nara 630-0192 , Japan
| | - Mamoru Fujitsuka
- Institute of Scientific and Industrial Research (SANKEN) , Osaka University , 8-1, Mihogaoka , Ibaraki , Osaka 567-0047 , Japan
| | - Ken Tokunaga
- Division of Liberal Arts, Centre for Promotion of Higher Education , Kogakuin University , 2665-1, Nakano , Hachioji, Tokyo 192-0015 , Japan
| | - Xu Lei
- Institute of Scientific and Industrial Research (SANKEN) , Osaka University , 8-1, Mihogaoka , Ibaraki , Osaka 567-0047 , Japan
| | - Tetsuro Majima
- Institute of Scientific and Industrial Research (SANKEN) , Osaka University , 8-1, Mihogaoka , Ibaraki , Osaka 567-0047 , Japan
| | - Jun-Ichi Kikuchi
- Graduate School of Materials Science , Nara Institute of Science and Technology , 8916-5, Takayama , Ikoma, Nara 630-0192 , Japan
| | - Yoshiki Ozawa
- Department of Material Science and Research Center for New Functional Materials, Graduate School of Material Science , University of Hyogo , 3-2-1, Kouto , Kamigori, Ako , Hyogo 678-1297 , Japan
| | - Masaaki Abe
- Department of Material Science and Research Center for New Functional Materials, Graduate School of Material Science , University of Hyogo , 3-2-1, Kouto , Kamigori, Ako , Hyogo 678-1297 , Japan
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13
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Diez-Cabanes V, Seber G, Franco C, Bejarano F, Crivillers N, Mas-Torrent M, Veciana J, Rovira C, Cornil J. Design of Perchlorotriphenylmethyl (PTM) Radical-Based Compounds for Optoelectronic Applications: The Role of Orbital Delocalization. Chemphyschem 2018; 19:2572-2578. [DOI: 10.1002/cphc.201800321] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Valentín Diez-Cabanes
- Laboratory for Chemistry of Novel Materials; University of Mons; Place du Parc 20 7000 Mons Belgium
| | - Gonca Seber
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC); Campus Universitari de UAB; 08193 Cerdanyola del Vallès (Barcelona) Spain
| | - Carlos Franco
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC); Campus Universitari de UAB; 08193 Cerdanyola del Vallès (Barcelona) Spain
- Current affiliation: ETH Zurich; Vladimir-Prelog-Weg 1-5/10 8093 Zurich Switzerland
| | - Francesc Bejarano
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC); Campus Universitari de UAB; 08193 Cerdanyola del Vallès (Barcelona) Spain
| | - Nuria Crivillers
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC); Campus Universitari de UAB; 08193 Cerdanyola del Vallès (Barcelona) Spain
| | - Marta Mas-Torrent
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC); Campus Universitari de UAB; 08193 Cerdanyola del Vallès (Barcelona) Spain
| | - Jaume Veciana
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC); Campus Universitari de UAB; 08193 Cerdanyola del Vallès (Barcelona) Spain
| | - Concepció Rovira
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC); Campus Universitari de UAB; 08193 Cerdanyola del Vallès (Barcelona) Spain
| | - Jérôme Cornil
- Laboratory for Chemistry of Novel Materials; University of Mons; Place du Parc 20 7000 Mons Belgium
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14
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Ivanov MV, Wang D, Rathore R. From Static to Dynamic: Electron Density of HOMO at Biaryl Linkage Controls the Mechanism of Hole Delocalization. J Am Chem Soc 2018; 140:4765-4769. [DOI: 10.1021/jacs.8b00466] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maxim V. Ivanov
- Department of Chemistry, Marquette University,
P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Denan Wang
- Department of Chemistry, Marquette University,
P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Rajendra Rathore
- Department of Chemistry, Marquette University,
P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
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15
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Mayorga Burrezo P, Franco C, Caballero R, Mas-Torrent M, Langa F, López Navarrete JT, Rovira C, Veciana J, Casado J. Oligothienylenevinylene Polarons and Bipolarons Confined between Electron-Accepting Perchlorotriphenylmethyl Radicals. Chemistry 2018; 24:3776-3783. [PMID: 29239499 DOI: 10.1002/chem.201705080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Indexed: 11/08/2022]
Abstract
A detailed analysis is undertaken of positively charged species generated on a series of thienylenevinylene (nTV) wires terminally substituted with two perchlorotriphenylmethyl (. PTM) radical acceptor groups, . PTM-nTV-PTM. (n=2-7). Motivated by the counterintuitive key role played by holes in the nTV bridges on the operating mechanism of electron transfer in their radical anion mixed-valence derivatives, a wide combination of experimental and theoretical techniques is used, with the aim of gaining further insights into their structural location. Consequently, contributions of the . PTM units for the stabilization of the radical cations and hole localization, particularly in the case of the shortest molecular wire, are probed. In this sense, the formation of quinoidal ring segments, resulting from the coupling of the unpaired electron of the . PTM radical site with those generated along the nTV chains is found. Additionally, open-shell dications, described by the recovery of the central aromaticity and two terminal quinoidal segments, assisted by the . PTM units, are detected.
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Affiliation(s)
- Paula Mayorga Burrezo
- Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, Campus Universitari de Bellaterra, 08193, Cerdanyola, Barcelona, Spain.,Department of Physical Chemistry, University of Malaga, Campus de Teatinos s/n, 29071, Malaga, Spain
| | - Carlos Franco
- Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, Campus Universitari de Bellaterra, 08193, Cerdanyola, Barcelona, Spain.,Current affiliation: ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093, Zürich, Switzerland
| | - Rubén Caballero
- Universidad de Castilla-La Mancha, Institute of Nanoscience, Nanotechnology and Molecular Materials (INAMOL), Campus de la Fábrica de Armas, Toledo, Spain
| | - Marta Mas-Torrent
- Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, Campus Universitari de Bellaterra, 08193, Cerdanyola, Barcelona, Spain
| | - Fernando Langa
- Universidad de Castilla-La Mancha, Institute of Nanoscience, Nanotechnology and Molecular Materials (INAMOL), Campus de la Fábrica de Armas, Toledo, Spain
| | - Juan T López Navarrete
- Department of Physical Chemistry, University of Malaga, Campus de Teatinos s/n, 29071, Malaga, Spain
| | - Concepció Rovira
- Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, Campus Universitari de Bellaterra, 08193, Cerdanyola, Barcelona, Spain
| | - Jaume Veciana
- Department of Molecular Nanoscience and Organic Materials, Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)/CIBER-BBN, Campus Universitari de Bellaterra, 08193, Cerdanyola, Barcelona, Spain
| | - Juan Casado
- Department of Physical Chemistry, University of Malaga, Campus de Teatinos s/n, 29071, Malaga, Spain
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16
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Alcón I, Viñes F, Moreira IDPR, Bromley ST. Existence of multi-radical and closed-shell semiconducting states in post-graphene organic Dirac materials. Nat Commun 2017; 8:1957. [PMID: 29208895 PMCID: PMC5717056 DOI: 10.1038/s41467-017-01977-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 10/30/2017] [Indexed: 11/09/2022] Open
Abstract
Post-graphene organic Dirac (PGOD) materials are ordered two-dimensional networks of triply bonded sp 2 carbon nodes spaced by π-conjugated linkers. PGOD materials are natural chemical extensions of graphene that promise to have an enhanced range of properties and applications. Experimentally realised molecules based on two PGOD nodes exhibit a bi-stable closed-shell/multi-radical character that can be understood through competing Lewis resonance forms. Here, following the same rationale, we predict that similar states should be accessible in PGOD materials, which we confirm using accurate density functional theory calculations. Although for graphene the semimetallic state is always dominant, for PGOD materials this state becomes marginally meta-stable relative to open-shell multi-radical and/or closed-shell states that are stabilised through symmetry breaking, in line with analogous molecular systems. These latter states are semiconducting, increasing the potential use of PGOD materials as highly tuneable platforms for future organic nano-electronics and spintronics.
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Affiliation(s)
- Isaac Alcón
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Carrer Martí i Franquès 1, 08028, Barcelona, Spain.
| | - Francesc Viñes
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Carrer Martí i Franquès 1, 08028, Barcelona, Spain
| | - Iberio de P R Moreira
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Carrer Martí i Franquès 1, 08028, Barcelona, Spain
| | - Stefan T Bromley
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Carrer Martí i Franquès 1, 08028, Barcelona, Spain.
- Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010, Barcelona, Spain.
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