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Murata T, Asakura N, Ukai S, Ueda A, Kanzaki Y, Sato K, Takui T, Morita Y. Intramolecular Magnetic Interaction of Spin-Delocalized Neutral Radicals through m-Phenylene Spacers. Chempluschem 2020; 84:680-685. [PMID: 31944024 DOI: 10.1002/cplu.201800662] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 01/06/2019] [Indexed: 11/10/2022]
Abstract
A new diradical having two 4,8,10-trioxotriangulene (TOT) neutral radical units linked through an m-phenylene moiety was synthesized and characterized by ESR measurements. An electrochemical study showed that the diradical undergoes two one-electron reductions to generate corresponding dianion species, suggesting the electronic interaction between two TOT units through the π-conjugated spacer. A strong intramolecular interaction between the two TOT units gives rise to the spin-projected small hyperfine couplings in comparison with those of the monomer. Furthermore, the temperature dependent ESR measurement revealed that the dimer behaves as an S=1 species in the ground state with a ferromagnetic interaction of 2 J/kB =+7±3 K.
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Affiliation(s)
- Tsuyoshi Murata
- Department of Applied Chemistry Faculty of Engineering, Aichi Institute of Technology, Yachigusa, 1247, Yakusa, Toyota, Aichi, Japan
| | - Noriaki Asakura
- Department of Applied Chemistry Faculty of Engineering, Aichi Institute of Technology, Yachigusa, 1247, Yakusa, Toyota, Aichi, Japan
| | - Shusaku Ukai
- Department of Applied Chemistry Faculty of Engineering, Aichi Institute of Technology, Yachigusa, 1247, Yakusa, Toyota, Aichi, Japan
| | - Akira Ueda
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, Japan
| | - Yuki Kanzaki
- Department of Chemistry and Molecular Materials Science Graduate School of Science, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka, Japan
| | - Kazunobu Sato
- Department of Chemistry and Molecular Materials Science Graduate School of Science, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka, Japan
| | - Takeji Takui
- Department of Chemistry and Molecular Materials Science Graduate School of Science, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka, Japan
| | - Yasushi Morita
- Department of Applied Chemistry Faculty of Engineering, Aichi Institute of Technology, Yachigusa, 1247, Yakusa, Toyota, Aichi, Japan
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2
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Minkin VI, Starikov AG, Starikova AA, Gapurenko OA, Minyaev RM, Boldyrev AI. Electronic structure and magnetic properties of the triangular nanographenes with radical substituents: a DFT study. Phys Chem Chem Phys 2020; 22:1288-1298. [DOI: 10.1039/c9cp05922a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
DFT modeling of triangular polycyclic hydrocarbons bearing radicals provided insights into dependence of electronic ground states on their structural peculiarities
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Affiliation(s)
- Vladimir I. Minkin
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
| | - Andrey G. Starikov
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
| | - Alyona A. Starikova
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
| | - Olga A. Gapurenko
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
| | - Ruslan M. Minyaev
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
| | - Alexander I. Boldyrev
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
- Department of Chemistry and Biochemistry
- Utah State University
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3
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Madhu V, Kanakati AK, Das SK. Serendipitous isolation of a triazinone-based air stable organic radical: synthesis, crystal structure, and computation. NEW J CHEM 2020. [DOI: 10.1039/d0nj02028a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Here we report the synthesis, isolation, and characterization of a dication salt, namely 4,6-bis(4,4′-bipyridinium)-1,3,5-triazin-2-one {12+(PF6)22−·2H2O1(PF6)2·2H2O}, and its radical cation salt, namely 4,6-bis(4,4′-bipyridinium)-1,3,5-triazin-2-one (1+˙PF6−1˙PF6).
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Affiliation(s)
- Vedichi Madhu
- Department of Applied Chemistry
- Karunya Institute of Technology and Sciences
- Coimbatore 641 114
- India
- School of Chemistry
| | - Arun Kumar Kanakati
- School of Chemistry
- University of Hyderabad
- Central University P.O
- Hyderabad 500 046
- India
| | - Samar K. Das
- School of Chemistry
- University of Hyderabad
- Central University P.O
- Hyderabad 500 046
- India
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4
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Affiliation(s)
- Kenichi Kato
- Department of ChemistryGraduate School of ScienceKyoto University Oiwake-cho, Kitashirakawa, Sakyo-ku Kyoto 606-8502 Japan
| | - Atsuhiro Osuka
- Department of ChemistryGraduate School of ScienceKyoto University Oiwake-cho, Kitashirakawa, Sakyo-ku Kyoto 606-8502 Japan
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5
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Kato K, Osuka A. Platforms for Stable Carbon‐Centered Radicals. Angew Chem Int Ed Engl 2019; 58:8978-8986. [DOI: 10.1002/anie.201900307] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Indexed: 11/12/2022]
Affiliation(s)
- Kenichi Kato
- Department of ChemistryGraduate School of ScienceKyoto University Oiwake-cho, Kitashirakawa, Sakyo-ku Kyoto 606-8502 Japan
| | - Atsuhiro Osuka
- Department of ChemistryGraduate School of ScienceKyoto University Oiwake-cho, Kitashirakawa, Sakyo-ku Kyoto 606-8502 Japan
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Kanzaki Y, Mitani S, Shiomi D, Morita Y, Takui T, Sato K. Microscopic Behavior of Active Materials Inside a TCNQ-Based Lithium-Ion Rechargeable Battery by in Situ 2D ESR Measurements. ACS APPLIED MATERIALS & INTERFACES 2018; 10:43631-43640. [PMID: 30461254 DOI: 10.1021/acsami.8b14967] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Real-time spectroscopic measurements in rechargeable batteries are important to understand the electrochemistry of the batteries at the molecular level and improve relevant functionalities. We have applied in situ two-dimensional (2D) electron spin resonance (ESR) spectroscopy to a well-known organic lithium-ion battery, which is composed of 7,7,8,8-tetracyanoquinodimethane (TCNQ) as the cathode-active material and a lithium metal anode electrode. The TCNQ rechargeable battery is suitable for investigating electrochemistry in the battery in terms of behavior of electron spin at microscopic levels on both the cathode and anode electrodes. We have discussed two-stage oxidation/reduction reactions of TCNQ, Li deposited/stripped process and their resulting dendritic and/or mossy microstructures, clearly elucidating the cause of the cell capacity degradation upon the charge-discharge cycles. The observed in situ ESR spectra showed that the degradation of the cell capacity was due to the elution of the active molecules, which caused the increase of ion conductivity by the substitution of the electrolyte solution for the adsorbed active materials on the conductive carbon surface. To discriminate paramagnetic species during the charge-discharge process, the generalized 2D correlation spectroscopy has been applied to characterize time-dependent in situ ESR spectra. The correlation analysis with in situ ESR helps us identify the paramagnetic species occurring in the battery cell in a straightforward manner.
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Affiliation(s)
| | | | | | - Yasushi Morita
- Department of Applied Chemistry, Faculty of Engineering , Aichi Institute of Technology , Yachigusa 1247 , Yakusa, Toyota 470-0392 , Japan
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7
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Murata T, Yamada C, Furukawa K, Morita Y. Mixed valence salts based on carbon-centered neutral radical crystals. Commun Chem 2018. [DOI: 10.1038/s42004-018-0048-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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8
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Morita Y, Murata T, Ueda A, Yamada C, Kanzaki Y, Shiomi D, Sato K, Takui T. Trioxotriangulene: Air- and Thermally Stable Organic Carbon-Centered Neutral π-Radical without Steric Protection. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180074] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yasushi Morita
- Department of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0392, Japan
| | - Tsuyoshi Murata
- Department of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0392, Japan
| | - Akira Ueda
- The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Chiaki Yamada
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yuki Kanzaki
- Department of Chemistry and Molecular Materials Science, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Daisuke Shiomi
- Department of Chemistry and Molecular Materials Science, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Kazunobu Sato
- Department of Chemistry and Molecular Materials Science, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Takeji Takui
- Department of Chemistry and Molecular Materials Science, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan
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Mou Z, Kertesz M. Sigma‐ versus Pi‐Dimerization Modes of Triangulene. Chemistry 2018; 24:6140-6147. [DOI: 10.1002/chem.201705763] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Zhongyu Mou
- Department of Chemistry and Institute of Soft Matter Georgetown University Washington DC 20057 USA
| | - Miklos Kertesz
- Department of Chemistry and Institute of Soft Matter Georgetown University Washington DC 20057 USA
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10
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Kushida T, Shirai S, Ando N, Okamoto T, Ishii H, Matsui H, Yamagishi M, Uemura T, Tsurumi J, Watanabe S, Takeya J, Yamaguchi S. Boron-Stabilized Planar Neutral π-Radicals with Well-Balanced Ambipolar Charge-Transport Properties. J Am Chem Soc 2017; 139:14336-14339. [DOI: 10.1021/jacs.7b05471] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tomokatsu Kushida
- Department
of Chemistry, Graduate School of Science, Integrated Research Consortium
on Chemical Sciences (IRCCS), and Institute of Transformative Bio-Molecules
(WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Shusuke Shirai
- Department
of Chemistry, Graduate School of Science, Integrated Research Consortium
on Chemical Sciences (IRCCS), and Institute of Transformative Bio-Molecules
(WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Naoki Ando
- Department
of Chemistry, Graduate School of Science, Integrated Research Consortium
on Chemical Sciences (IRCCS), and Institute of Transformative Bio-Molecules
(WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Toshihiro Okamoto
- Department
of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Hiroyuki Ishii
- Division
of Applied Physics, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Hiroyuki Matsui
- Department
of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Masakazu Yamagishi
- Department
of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Takafumi Uemura
- Department
of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Junto Tsurumi
- Department
of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Shun Watanabe
- Department
of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Jun Takeya
- Department
of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Shigehiro Yamaguchi
- Department
of Chemistry, Graduate School of Science, Integrated Research Consortium
on Chemical Sciences (IRCCS), and Institute of Transformative Bio-Molecules
(WPI-ITbM), Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
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11
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Mou Z, Kertesz M. Pancake Bond Orders of a Series of π‐Stacked Triangulene Radicals. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704941] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhongyu Mou
- Chemistry Department Georgetown University 37th and O Streets, NW Washington DC 20057-1227 USA
| | - Miklos Kertesz
- Chemistry Department Georgetown University 37th and O Streets, NW Washington DC 20057-1227 USA
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12
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Mou Z, Kertesz M. Pancake Bond Orders of a Series of π‐Stacked Triangulene Radicals. Angew Chem Int Ed Engl 2017; 56:10188-10191. [DOI: 10.1002/anie.201704941] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Zhongyu Mou
- Chemistry Department Georgetown University 37th and O Streets, NW Washington DC 20057-1227 USA
| | - Miklos Kertesz
- Chemistry Department Georgetown University 37th and O Streets, NW Washington DC 20057-1227 USA
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