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

Research output: Contribution to journalArticle

22 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1905-1911
Number of pages7
JournalPolyhedron
Volume26
Issue number9-11
DOIs
Publication statusPublished - Jun 15 2007

Fingerprint

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

Cite this

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.

In: Polyhedron, Vol. 26, No. 9-11, 15.06.2007, p. 1905-1911.

Research output: Contribution to journalArticle

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. In: Polyhedron. 2007 ; Vol. 26, No. 9-11. pp. 1905-1911.
@article{75248e45d67142eeadcf85cb865c8d48,
title = "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",
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",
year = "2007",
month = "6",
day = "15",
doi = "10.1016/j.poly.2006.09.036",
language = "English",
volume = "26",
pages = "1905--1911",
journal = "Polyhedron",
issn = "0277-5387",
publisher = "Elsevier Limited",
number = "9-11",

}

TY - JOUR

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.

UR - http://www.scopus.com/inward/record.url?scp=34249741636&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34249741636&partnerID=8YFLogxK

U2 - 10.1016/j.poly.2006.09.036

DO - 10.1016/j.poly.2006.09.036

M3 - Article

AN - SCOPUS:34249741636

VL - 26

SP - 1905

EP - 1911

JO - Polyhedron

JF - Polyhedron

SN - 0277-5387

IS - 9-11

ER -