Complexes of lanthanides with spin-labeled pyrazolylquinoline

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• 作者：E. V. Tretyakov ; S. V. Fokin ; E. M. Zueva ; A. O. Tkacheva…
• 关键词：lanthanides ; pyrazolylquinolines ; nitroxyl radicals ; single ; molecule magnets
• 刊名：Russian Chemical Bulletin
• 出版年：2014
• 出版时间：July 2014
• 年：2014
• 卷：63
• 期：7
• 页码：1459-1464
• 全文大小：345 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Chemistry
  Organic Chemistry
  Inorganic Chemistry
  Russian Library of Science
  
• 出版者：Springer New York
• ISSN：1573-9171

文摘

The reactions of EuIII, GdIII, and TbIII hexafluoroacetylacetonates with 4,4,5,5-tetramethyl-2-[1-(4-methylquinolin-2-yl)-1H-pyrazol-4-yl]-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (L) afford heterospin complexes [Ln(hfac)3L2]. The X-ray diffraction studies of the complexes showed that the ligand L is coordinated in a monodentate fashion through the oxygen atom of the >N-O group. According to the magnetochemical data, at temperatures below 3 K the complex [Tb(hfac)3L2] exhibits properties of a single-molecule magnet with an anisotropy barrier of 12.2 cm?.