Anisotropic Change in the Magnetic Susceptibility of a Dynamic Single Crystal of a Cobalt(II) Complex

Zi Shuo Yao, Shu Qi Wu, Yasutaka Kitagawa, Sheng Qun Su, You Gui Huang, Guo Ling Li, Zhong Hai Ni, Hiroyuki Nojiri, Yoshihito Shiota, Kazunari Yoshizawa, Soonchul Kang, Shinji Kanegawa, Osamu Sato

研究成果: ジャーナルへの寄稿記事

9 引用 (Scopus)

抄録

Atypically anisotropic and large changes in magnetic susceptibility, along with a change in crystalline shape, were observed in a CoIIcomplex at near room temperature. This was achieved by combining oxalate molecules, acting as rotor, and a CoIIion with unquenched orbital angular momentum. A thermally controlled 90° rotation of the oxalate counter anion triggered a symmetry-breaking ferroelastic phase transition, accompanied by contraction–expansion behavior (ca. 4.5 %) along the long axis of a rod-like single crystal. The molecular rotation induced a minute variation in the coordination geometry around the CoIIion, resulting in an abrupt decrease and a remarkable increase in magnetic susceptibility along the direction perpendicular and parallel to the long axis of the crystal, respectively. Theoretical calculations suggested that such an unusual anisotropic change in magnetic susceptibility was due to a substantial reorientation of magnetic anisotropy induced by slight disruption in the ideal D3coordination environment of the complex cation.

元の言語英語
ページ(範囲)717-721
ページ数5
ジャーナルAngewandte Chemie - International Edition
56
発行部数3
DOI
出版物ステータス出版済み - 1 1 2017

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Cobalt
Magnetic susceptibility
Oxalates
Single crystals
Angular momentum
Magnetic anisotropy
Anions
Cations
Negative ions
Rotors
Phase transitions
Positive ions
Crystalline materials
Crystals
Molecules
Geometry
Temperature

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

これを引用

Anisotropic Change in the Magnetic Susceptibility of a Dynamic Single Crystal of a Cobalt(II) Complex. / Yao, Zi Shuo; Wu, Shu Qi; Kitagawa, Yasutaka; Su, Sheng Qun; Huang, You Gui; Li, Guo Ling; Ni, Zhong Hai; Nojiri, Hiroyuki; Shiota, Yoshihito; Yoshizawa, Kazunari; Kang, Soonchul; Kanegawa, Shinji; Sato, Osamu.

:: Angewandte Chemie - International Edition, 巻 56, 番号 3, 01.01.2017, p. 717-721.

研究成果: ジャーナルへの寄稿記事

Yao, Zi Shuo ; Wu, Shu Qi ; Kitagawa, Yasutaka ; Su, Sheng Qun ; Huang, You Gui ; Li, Guo Ling ; Ni, Zhong Hai ; Nojiri, Hiroyuki ; Shiota, Yoshihito ; Yoshizawa, Kazunari ; Kang, Soonchul ; Kanegawa, Shinji ; Sato, Osamu. / Anisotropic Change in the Magnetic Susceptibility of a Dynamic Single Crystal of a Cobalt(II) Complex. :: Angewandte Chemie - International Edition. 2017 ; 巻 56, 番号 3. pp. 717-721.
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abstract = "Atypically anisotropic and large changes in magnetic susceptibility, along with a change in crystalline shape, were observed in a CoIIcomplex at near room temperature. This was achieved by combining oxalate molecules, acting as rotor, and a CoIIion with unquenched orbital angular momentum. A thermally controlled 90° rotation of the oxalate counter anion triggered a symmetry-breaking ferroelastic phase transition, accompanied by contraction–expansion behavior (ca. 4.5 {\%}) along the long axis of a rod-like single crystal. The molecular rotation induced a minute variation in the coordination geometry around the CoIIion, resulting in an abrupt decrease and a remarkable increase in magnetic susceptibility along the direction perpendicular and parallel to the long axis of the crystal, respectively. Theoretical calculations suggested that such an unusual anisotropic change in magnetic susceptibility was due to a substantial reorientation of magnetic anisotropy induced by slight disruption in the ideal D3coordination environment of the complex cation.",
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AU - Su, Sheng Qun

AU - Huang, You Gui

AU - Li, Guo Ling

AU - Ni, Zhong Hai

AU - Nojiri, Hiroyuki

AU - Shiota, Yoshihito

AU - Yoshizawa, Kazunari

AU - Kang, Soonchul

AU - Kanegawa, Shinji

AU - Sato, Osamu

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N2 - Atypically anisotropic and large changes in magnetic susceptibility, along with a change in crystalline shape, were observed in a CoIIcomplex at near room temperature. This was achieved by combining oxalate molecules, acting as rotor, and a CoIIion with unquenched orbital angular momentum. A thermally controlled 90° rotation of the oxalate counter anion triggered a symmetry-breaking ferroelastic phase transition, accompanied by contraction–expansion behavior (ca. 4.5 %) along the long axis of a rod-like single crystal. The molecular rotation induced a minute variation in the coordination geometry around the CoIIion, resulting in an abrupt decrease and a remarkable increase in magnetic susceptibility along the direction perpendicular and parallel to the long axis of the crystal, respectively. Theoretical calculations suggested that such an unusual anisotropic change in magnetic susceptibility was due to a substantial reorientation of magnetic anisotropy induced by slight disruption in the ideal D3coordination environment of the complex cation.

AB - Atypically anisotropic and large changes in magnetic susceptibility, along with a change in crystalline shape, were observed in a CoIIcomplex at near room temperature. This was achieved by combining oxalate molecules, acting as rotor, and a CoIIion with unquenched orbital angular momentum. A thermally controlled 90° rotation of the oxalate counter anion triggered a symmetry-breaking ferroelastic phase transition, accompanied by contraction–expansion behavior (ca. 4.5 %) along the long axis of a rod-like single crystal. The molecular rotation induced a minute variation in the coordination geometry around the CoIIion, resulting in an abrupt decrease and a remarkable increase in magnetic susceptibility along the direction perpendicular and parallel to the long axis of the crystal, respectively. Theoretical calculations suggested that such an unusual anisotropic change in magnetic susceptibility was due to a substantial reorientation of magnetic anisotropy induced by slight disruption in the ideal D3coordination environment of the complex cation.

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