New Charge-Transfer Complex-Based Organic Ferromagnets: Pyridinium-Substitued Imidazolin-1-Oxyl/ Tetrafluorotetracyanoquinodimethanide or Hexacyanobutadienide Salts
作者:
Toyonari Sugimoto,
Masaya Tsujii,
Takehito Suga,
Nobuyoshi Hosoito,
Masaya Ishikawa,
Naoya Takeda,
Motoo Shiro,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 272,
issue 1
页码: 183-194
ISSN:1058-725X
年代: 1995
DOI:10.1080/10587259508055287
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The charge-transfer (CT) complexes of a series of 4,4,5,5-tetramethylimidazolin-1-oxyls substituted with 4-(N-alkylpyridinium) groups at the 2-position with two radical anions, tetrafluorotetracyanoquinodimethanide (TCNQF4–) and hexacyanobutadienide (HCBD–) were prepared and their magnetic properties were investigated in the temperature range of 5 to 300 K. Ferromagnetic interaction was observed for the three CT complexes. Furthermore, the magnetic measurement at lower temperatures than 5 K showed that these CT complexes exhibited a ferromagnetic phase transition between 0.4 and 0.55 K. Consequently, the present CT complexes make a group of another type of organic ferromagnets without any magnetic metal elements.
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