Magnetic property of 1:2 mixture of Co(p-tolsal)2; p-tolsal = N-p-tolylsalicylideniminato, and cyclic pentacarbene-pyridine with S = 10/2 in dilute frozen solution

Hiroyuki Tobinaga, Madoka Suehiro, Tetsuji Ito, Guangyuan Zhou, Satoru Karasawa, Noboru Koga

研究成果: ジャーナルへの寄稿記事

22 引用 (Scopus)

抄録

A cyclic pentadiazo-pyridine ligand, cD5py, was prepared and its photoproduct, cC5py, in a frozen solution was confirmed to be a high-spin polycarbene with S = 10/2. The magnetic property of the 1:2 mixture of Co(p-tolsal)2; p-tolsal = N-p-tolylsalicylideniminato, and cD5py in a dilute frozen solution after irradiation was investigated by SQUID magneto/susceptometry. In the ac magnetic susceptibility measurements, the in-phase and out-of-phase components (χ′ and χ″, respectively) with frequency dependence were observed, indicating that the 1:2 complex, Co(p-tolsal)2-(cC5py)2, had slow magnetic relaxation characteristic of the single-molecule magnet (SMM). From the χ″ versus T plots with various frequencies, the values of activation barrier, Ueff, for the reverse of the magnetism was estimated to be 72 K. In the dc magnetic susceptibility measurements, the magnetic hysteresis loops were observed below 3 K. The value of the coercive force, Hc, depends on the temperature and increases on cooling. The hysteresis loop with Hc = 7.1 kOe was observed at 1.9 K.

元の言語英語
ページ(範囲)1905-1911
ページ数7
ジャーナルPolyhedron
26
発行部数9-11
DOI
出版物ステータス出版済み - 6 15 2007

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Hysteresis loops
Magnetic susceptibility
Pyridine
pyridines
Magnetic properties
hysteresis
magnetic properties
Magnetic relaxation
magnetic permeability
Magnetic hysteresis
SQUIDs
magnetic relaxation
Magnetism
Coercive force
Magnets
magnets
plots
Chemical activation
Ligands
Irradiation

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

これを引用

Magnetic property of 1:2 mixture of Co(p-tolsal)2; p-tolsal = N-p-tolylsalicylideniminato, and cyclic pentacarbene-pyridine with S = 10/2 in dilute frozen solution. / Tobinaga, Hiroyuki; Suehiro, Madoka; Ito, Tetsuji; Zhou, Guangyuan; Karasawa, Satoru; Koga, Noboru.

:: Polyhedron, 巻 26, 番号 9-11, 15.06.2007, p. 1905-1911.

研究成果: ジャーナルへの寄稿記事

Tobinaga, Hiroyuki ; Suehiro, Madoka ; Ito, Tetsuji ; Zhou, Guangyuan ; Karasawa, Satoru ; Koga, Noboru. / Magnetic property of 1:2 mixture of Co(p-tolsal)2; p-tolsal = N-p-tolylsalicylideniminato, and cyclic pentacarbene-pyridine with S = 10/2 in dilute frozen solution. :: Polyhedron. 2007 ; 巻 26, 番号 9-11. pp. 1905-1911.
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abstract = "A cyclic pentadiazo-pyridine ligand, cD5py, was prepared and its photoproduct, cC5py, in a frozen solution was confirmed to be a high-spin polycarbene with S = 10/2. The magnetic property of the 1:2 mixture of Co(p-tolsal)2; p-tolsal = N-p-tolylsalicylideniminato, and cD5py in a dilute frozen solution after irradiation was investigated by SQUID magneto/susceptometry. In the ac magnetic susceptibility measurements, the in-phase and out-of-phase components (χ′ and χ″, respectively) with frequency dependence were observed, indicating that the 1:2 complex, Co(p-tolsal)2-(cC5py)2, had slow magnetic relaxation characteristic of the single-molecule magnet (SMM). From the χ″ versus T plots with various frequencies, the values of activation barrier, Ueff, for the reverse of the magnetism was estimated to be 72 K. In the dc magnetic susceptibility measurements, the magnetic hysteresis loops were observed below 3 K. The value of the coercive force, Hc, depends on the temperature and increases on cooling. The hysteresis loop with Hc = 7.1 kOe was observed at 1.9 K.",
author = "Hiroyuki Tobinaga and Madoka Suehiro and Tetsuji Ito and Guangyuan Zhou and Satoru Karasawa and Noboru Koga",
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T1 - Magnetic property of 1:2 mixture of Co(p-tolsal)2; p-tolsal = N-p-tolylsalicylideniminato, and cyclic pentacarbene-pyridine with S = 10/2 in dilute frozen solution

AU - Tobinaga, Hiroyuki

AU - Suehiro, Madoka

AU - Ito, Tetsuji

AU - Zhou, Guangyuan

AU - Karasawa, Satoru

AU - Koga, Noboru

PY - 2007/6/15

Y1 - 2007/6/15

N2 - A cyclic pentadiazo-pyridine ligand, cD5py, was prepared and its photoproduct, cC5py, in a frozen solution was confirmed to be a high-spin polycarbene with S = 10/2. The magnetic property of the 1:2 mixture of Co(p-tolsal)2; p-tolsal = N-p-tolylsalicylideniminato, and cD5py in a dilute frozen solution after irradiation was investigated by SQUID magneto/susceptometry. In the ac magnetic susceptibility measurements, the in-phase and out-of-phase components (χ′ and χ″, respectively) with frequency dependence were observed, indicating that the 1:2 complex, Co(p-tolsal)2-(cC5py)2, had slow magnetic relaxation characteristic of the single-molecule magnet (SMM). From the χ″ versus T plots with various frequencies, the values of activation barrier, Ueff, for the reverse of the magnetism was estimated to be 72 K. In the dc magnetic susceptibility measurements, the magnetic hysteresis loops were observed below 3 K. The value of the coercive force, Hc, depends on the temperature and increases on cooling. The hysteresis loop with Hc = 7.1 kOe was observed at 1.9 K.

AB - A cyclic pentadiazo-pyridine ligand, cD5py, was prepared and its photoproduct, cC5py, in a frozen solution was confirmed to be a high-spin polycarbene with S = 10/2. The magnetic property of the 1:2 mixture of Co(p-tolsal)2; p-tolsal = N-p-tolylsalicylideniminato, and cD5py in a dilute frozen solution after irradiation was investigated by SQUID magneto/susceptometry. In the ac magnetic susceptibility measurements, the in-phase and out-of-phase components (χ′ and χ″, respectively) with frequency dependence were observed, indicating that the 1:2 complex, Co(p-tolsal)2-(cC5py)2, had slow magnetic relaxation characteristic of the single-molecule magnet (SMM). From the χ″ versus T plots with various frequencies, the values of activation barrier, Ueff, for the reverse of the magnetism was estimated to be 72 K. In the dc magnetic susceptibility measurements, the magnetic hysteresis loops were observed below 3 K. The value of the coercive force, Hc, depends on the temperature and increases on cooling. The hysteresis loop with Hc = 7.1 kOe was observed at 1.9 K.

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