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Carrier doping effect into quasi-one-dimensional bromo-bridged Ni(III) complexes with strong electron-correlation by Cu(II) ions, [Ni1-xCux(chxn)2Br]Br2-x
Authors:Yamashita Masahiro  Ono Takashi  Matsunaga Satoshi  Sasaki Mari  Takaishi Shinya  Iwahori Fumiyasu  Miyasaka Hitoshi  Sugiura Ken-ihi  Kishida Hideo  Okamoto Hiroshi  Tanaka Hisaaki  Hasegawa Yasuhisa  Marumoto Kazuhiro  Ito Hiroshi  Kuroda Sin-Ichi  Kimura Noriyoshi
Institution:Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University and CREST (JST), 1-1 Minamiosawa, Hachioji 192-0397, Japan. yamashiT@comp.metro-u.ac.jp
Abstract:This communication will describe the electron doping effect into Ni(III) complexes by Cu(II) ions, Ni(1-x)Cu(x)(chxn)(2)Br]Br(2-x) (x = 0.038 and 0.101) by using an electrochemical oxidation method. A drastic increase of electrical conductivity as well as a new absorption band around 0.5 eV in single crystal reflectance spectra was observed by doping Cu(II) ions, indicating the electron doping was successfully made. An ESR result shows unpaired electrons locate in the d(x2-y2) orbitals of Cu(II) and have almost no interaction with those of other ions.
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