共 29 条
Upward temperature shift of the intrinsic phase lag of the magnetization of bis(phthalocyaninato)terbium by ligand oxidation creating an S = 1/2 spin
被引:218
作者:

Ishikawa, N
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Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan

Sugita, M
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机构: Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan

Tanaka, N
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机构: Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan

Ishikawa, T
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机构: Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan

Koshihara, SY
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机构: Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan

Kaizu, Y
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机构: Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan
机构:
[1] Tokyo Inst Technol, Dept Chem, Meguro Ku, Tokyo 1528551, Japan
[2] Tokyo Inst Technol, Dept Mat Sci, Meguro Ku, Tokyo 1528551, Japan
关键词:
D O I:
10.1021/ic049348b
中图分类号:
O61 [无机化学];
学科分类号:
070301 ;
081704 ;
摘要:
An alternating-current (ac) magnetic susceptibility measurement for the [(Pc)(2)Tb-III](0) complex (Pc = phthalocyaninato) has shown that ligand oxidation of the anionic [(Pc)(2)Tb-III](-) complex gives rise to a significant upward shift of the temperature range where the magnetization response shows a phase lag behind the time-varying external magnetic field. The peaks of the out-of-phase component of the ac susceptibility of the pi-radical [(Pc)(2)Tb-III](0) were observed at 50, 43, and 36 K with ac magnetic fields of 10(3), 10(2), and 10 Hz, respectively, which were more than 10 K higher than the corresponding values of the anionic complex with a closed-shell.7r-system. The ac susceptibility measurements on the complex with octa(dodecoxy) -substituted Pc ligand, which is readily dilutable in diamagnetic media, proved that the significant rise of the temperatures occurs as an intrinsic single-molecular property of the complex possessing both J = 6 and S = (1)/(2) systems, and is not due to long-range magnetic order or interactions between adjacent unpaired pi-electrons.
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页码:5498 / 5500
页数:3
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