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

Masahiro Yamashita; Takashi Ono; Satoshi Matsunaga; Mari Sasaki; Shinya Takaishi; Fumiyasu Iwahori; Hitoshi Miyasaka; Ken-ihi Sugiura; Hideo Kishida; Hiroshi Okamoto; Hisaaki Tanaka; Yasuhisa Hasegawa; Kazuhiro Marumoto; Hiroshi Ito; Sin-Ichi Kuroda; Noriyoshi Kimura

doi:10.1021/ic0349555

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

Inorg Chem. 2003 Dec 1;42(24):7692-4. doi: 10.1021/ic0349555.

Authors

Masahiro Yamashita¹, Takashi Ono, Satoshi Matsunaga, Mari Sasaki, Shinya Takaishi, Fumiyasu Iwahori, Hitoshi Miyasaka, Ken-ihi Sugiura, Hideo Kishida, Hiroshi Okamoto, Hisaaki Tanaka, Yasuhisa Hasegawa, Kazuhiro Marumoto, Hiroshi Ito, Sin-Ichi Kuroda, Noriyoshi Kimura

Affiliation

¹ 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

PMID: 14632474
DOI: 10.1021/ic0349555

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.