Magnetic study of N,N,N',N'-tetramethyl-p-phenylenediamine (wurster's blue) tetrafluoroborate cation radical.

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概要

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• Wurster's Blue cation radical, which is composed of TMPD cation and BF<SUB>4</SUB> anion moieties, was prepared and its magnetic properties were examined. The cation radical shows similar magnetic behavior to that of the TMPD–ClO<SUB>4</SUB> cation radical, but there is a slight perturbation when changing the counteranions from perchlorate to tetrafluoroborate. A phase transition takes place at 190.5 K, which is attributable to a dimerization involving a small molecular displacement in the crystal lattice. These phenomena are discussed using the magnetic susceptibility data, thermal study, and ESR observations due to triplet exciton. The magnetic data are described by comparison with Wurster's Blue perchlorate cation radical.

• 公益社団法人 日本化学会の論文

著者

• Fujita Hideo

  College Of Liberal Arts And Sciences Kyoto University

• Deguchi Yasuo

  College Of Liberal Arts And Science Kyoto University

• Yamauchi Jun

  College Of Liberal Arts And Sciences Kyoto University

関連論文

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• Studies of the Equilibria between Tetraarylallyl-type Radicals and Their Dimers
• Abnormal Hyperfine Splitting in the ESR Spectra of α,α,γ,γ-Tetraphenylallyl-type Organic Stable Free Radicals
• Magnetic study of N,N,N',N'-tetramethyl-p-phenylenediamine (wurster's blue) tetrafluoroborate cation radical.
• Magnetic Properties of Some Iminoxyl Polyradicals. II. TEMPOP Triradical and TEMPOS Tetraradical
• ESR studies of temperature dependent zero-field splitting in yang's biradical.

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