Electrochemical preparation and characterization of the radical salts of (phthalocyaninato)nickel, NiPc(SbF6)0.5, and NiPc(AsF6)0.5.

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概要

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• The single crystals of NiPc(SbF<SUB>6</SUB>)<SUB>0.5</SUB> and NiPc(AsF<SUB>6</SUB>)<SUB>0.5</SUB> were prepared by means of an electrochemical method. The electrical, magnetic, optical, and structural properties of these crystals were examined. These crystals are isostructural to each other, and exhibit a metallic behavior at least above 200 K. The <I>g</I>-values of the ESR signals remarkably depend upon temperature. By the aid of the low temperature experiments of XANES and reflectance spectrum, the temperature dependence is explained by the model based on the interaction between the small amount of local spins on the Ni atoms and the conduction electrons on the ligand chain. In addition, a sample dependence was found on the ESR properties of the crystals of NiPc(AsF<SUB>6</SUB>)<SUB>0.5</SUB>. This is attributed to the sample dependence of the concentration of the local spins on Ni atoms. From these considerations, we concluded that the ligand part is mainly oxidized in these partially oxidized salts, in other words the conduction electrons are located on the ligand chain. The bandwidth of the conduction band was estimated to be about 1 eV.

• 公益社団法人 日本化学会の論文

著者

• Kosugi Nobuhiro

  Department Of Chemistry University Of Tokyo

• Yakushi Kyuya

  Department Of Chemistry Faculty Of Science University Of Tokyo

• Sugano Tadashi

  Institute For Solid State Physics University Of Tokyo

• Tanaka Jiro

  Department Of Biomaterials Okayama University Graduate School Of Medicine Dentistry And Pharmaceutic

• Kuroda Haruo

  Department Of Chemistry Faculty Of Science The University Of Tokyo

• Yamakado Hideo

  Department Of Chemistry Graduate School Of Science Tohoku University

• Kinoshita Minoru

  Institute For Solid State Physics The University Of Tokyo

• KAWAMOTO Atsushi

  Department of Chemistry, Faculty of Science, Nagoya University

• Kawamoto Atsushi

  Department of Biology, Faculty of Science, Chiba University

• Yoshitake Michiko

  Department of Chemistry, Faculty of Science, University of Tokyo

• Yoshitake Michiko

  Department of Chemistry, Faculty of Science, the University of Tokyo

• Kuroda Haruo

  Department of Chemistry and Research Center for Spectrochemistry, Faculty of Science, The University of Tokyo

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