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
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research (B) (No. 17350070) and a Grant-in-Aid for Scientific Research on Priority Areas “Application of Molecular Spin” (No. 15087205) from the Ministry of Education, Science, Sports and Technology (MEXT), Japan. A part of this work was supported by “Nanotechnology Support Project” of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
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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U2 - 10.1016/j.poly.2006.09.036
DO - 10.1016/j.poly.2006.09.036
M3 - Article
AN - SCOPUS:34249741636
SN - 0277-5387
VL - 26
SP - 1905
EP - 1911
JO - Polyhedron
JF - Polyhedron
IS - 9-11
ER -