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Yang Y, Qiu L, Shi X. Chalcogen Effect of Atom Substitution on the Properties of Tris(2,4,6-trichlorophenyl)methyl(TTM) Radical. Chem Res Chin Univ 2023. [DOI: 10.1007/s40242-023-3008-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
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Takeyama T, Suzuki T, Kikuchi M, Kobayashi M, Oshita H, Kawashima K, Mori S, Abe H, Hoshino N, Iwatsuki S, Shimazaki Y. Solid State Characterization of One‐ and Two‐Electron Oxidized Cu
II
‐salen Complexes with
para
‐Substituents: Geometric Structure‐Magnetic Property Relationship. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100776] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tomoyuki Takeyama
- Department of Chemistry Konan University Higashinada-ku Kobe 658-8501 Japan
| | - Takashi Suzuki
- Graduate School of Science and Engineering Ibaraki University Bunkyo Mito 310-8512 Japan
| | - Misa Kikuchi
- College of Science Ibaraki University Bunkyo Mito 310-8512 Japan
| | - Misato Kobayashi
- Department of Chemistry Konan University Higashinada-ku Kobe 658-8501 Japan
| | - Hiromi Oshita
- Institute of Materials Structure Science (IMSS) High Energy Accelerator Research Organization (KEK) 1-1 Oho, Tsukuba Ibaraki 305-0801 Japan
| | - Kyohei Kawashima
- Institute for Materials Chemistry Engineering, Kyushu University 6-1 kasuga-koen Kasuga, Fukuoka 816-8580 Japan
| | - Seiji Mori
- Graduate School of Science and Engineering Ibaraki University Bunkyo Mito 310-8512 Japan
- College of Science Ibaraki University Bunkyo Mito 310-8512 Japan
| | - Hitoshi Abe
- Graduate School of Science and Engineering Ibaraki University Bunkyo Mito 310-8512 Japan
- Institute of Materials Structure Science (IMSS) High Energy Accelerator Research Organization (KEK) 1-1 Oho, Tsukuba Ibaraki 305-0801 Japan
- School of High Energy Accelerator Science SOKENDAI (the Graduate University for Advanced Studies) 1-1 Oho, Tsukuba Ibaraki 305-0801 Japan
| | - Norihisa Hoshino
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM) Tohoku University 2-1-1 Katahira, Aoba-ku Sendai 980-8577 Japan
| | - Satoshi Iwatsuki
- Department of Chemistry Konan University Higashinada-ku Kobe 658-8501 Japan
| | - Yuichi Shimazaki
- Graduate School of Science and Engineering Ibaraki University Bunkyo Mito 310-8512 Japan
- College of Science Ibaraki University Bunkyo Mito 310-8512 Japan
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Structural and Magnetic Studies on Nickel(II) and Cobalt(II) Complexes with Polychlorinated Diphenyl(4-pyridyl)methyl Radical Ligands. Molecules 2021; 26:molecules26185596. [PMID: 34577066 PMCID: PMC8469047 DOI: 10.3390/molecules26185596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/09/2021] [Accepted: 09/10/2021] [Indexed: 11/26/2022] Open
Abstract
New magnetic metal complexes with organic radical ligands, [M(hfac)2(PyBTM)2] (M = NiII, CoII; hfac = hexafluoroacetylacetonato, PyBTM = (3,5-dichloro-4-pyridyl)bis(2,4,6-trichlorophenyl)methyl radical), were prepared and their crystal structures, magnetic properties, and electronic structures were investigated. Metal ions in [M(hfac)2(PyBTM)2] constructed distorted octahedral coordination geometry, where the two PyBTM molecules ligated in the trans configuration. Magnetic investigation using a SQUID magnetometer revealed that χT increased with decreasing temperature from 300 K in the two complexes, indicating an efficient intramolecular ferromagnetic exchange interaction taking place between the spins on PyBTM and M with J/kB of 21.8 K and 11.8 K for [NiII(hfac)2(PyBTM)2] and [CoII(hfac)2(PyBTM)2]. The intramolecular ferromagnetic couplings in the two complexes could be explained by density functional theory calculations, and would be attributed to a nearly orthogonal relationship between the spin orbitals on PyBTM and the metal ions. These results demonstrate that pyridyl-containing triarylmethyl radicals are key building blocks for magnetic molecular materials with controllable/predictable magnetic interactions.
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Kimura S, Matsuoka R, Kimura S, Nishihara H, Kusamoto T. Radical-Based Coordination Polymers as a Platform for Magnetoluminescence. J Am Chem Soc 2021; 143:5610-5615. [PMID: 33826332 DOI: 10.1021/jacs.1c00661] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Spin-correlated electronic and magnetic properties of organic radicals have been developed, but luminescence properties, based on interplay with spins, have rarely been reported. The effect of magnetic fields on luminescence (i.e., magnetoluminescence) is a rare example of such properties, observed to date only in radicals dispersed in host matrices. We now report a novel method for achieving radical magnetoluminescence involving radical-based coordination polymers (CPs). The luminescence properties of the bis(3,5-dichloro-4-pyridyl)(2,4,6-trichlorophenyl)methyl (bisPyTM) and tris(3,5-dichloro-4-pyridyl)methyl (trisPyM) radicals and their 1D and 2D ZnII CPs were investigated. Although solid-state emissions of bisPyTM and trisPyM were not affected significantly by external magnetic fields at 4.2 K, those of CPs were greatly modulated. Studies of the crystal structures, magnetic properties, and the temperature-dependence and time-resolved properties of the magnetoluminescence indicate that the reduction of radical-radical interactions in CPs would be a key method for achieving magnetoluminescence.
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Affiliation(s)
- Shun Kimura
- Institute for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan.,Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ryota Matsuoka
- Institute for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, Hayama, Kanagawa 240-0193, Japan
| | - Shojiro Kimura
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.,Research Center for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Tetsuro Kusamoto
- Institute for Molecular Science, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Shonan Village, Hayama, Kanagawa 240-0193, Japan.,JST-PRESTO, 4-1-8, Honcho, Kawaguchi, Saitama 332-0012, Japan
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Mohammadizadeh A, Fazaeli R. Correlation between Pseudo Jahn–Teller Effect Parameters, Hardness, and LP-LP Repulsion on Structural and Configurational Behaviors of Hydrazine, Diphosphane, and Diarasane. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421030158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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