[U(Tp(Me2))2(bipy)]+: a cationic uranium(III) complex with single-molecule-magnet behavior

The addition of 2,2'-bipyridine to [U(Tp(Me2))(2)I] (1) results in the displacement of the iodide and the formation of the cationic uranium(III) complex [U(Tp(Me2))(2)(bipy)]I (2). This compound was isolated as a dark-green solid in good yield and characterized by IR and NMR spectroscopies, and...

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Bibliographic Details
Published in:Inorganic chemistry Vol. 50; no. 20; p. 9915
Main Authors: Antunes, Maria A, Pereira, Laura C J, Santos, Isabel C, Mazzanti, Marinella, Marçalo, Joaquim, Almeida, Manuel
Format: Journal Article
Language:English
Published: United States 17.10.2011
ISSN:1520-510X
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Summary:The addition of 2,2'-bipyridine to [U(Tp(Me2))(2)I] (1) results in the displacement of the iodide and the formation of the cationic uranium(III) complex [U(Tp(Me2))(2)(bipy)]I (2). This compound was isolated as a dark-green solid in good yield and characterized by IR and NMR spectroscopies, and its molecular structure was determined by single-crystal X-ray diffraction. Studies of its magnetic properties revealed a frequency dependence of magnetization with a blocking temperature of 4.5 K and, at lower temperatures, a slow relaxation of magnetization with an energy barrier of 18.2 cm(-1), characteristic of single-molecule-magnet behavior.
ISSN:1520-510X
DOI:10.1021/ic200705p