Tuning of electronic structures of quasi-one-dimensional bromo-bridged Ni(III) complexes with strong electron-correlation by doping of Co(III) ions, [Ni(1-x)Co(x)(Chxn)(2)Br]Br(2) |
| |
Authors: | Yamashita M Yokoyama K Furukawa S Manabe T Ono T Nakata K Kachi-Terajima C Iwahori F Ishii T Miyasaka H Sugiura K Matsuzaki H Kishida H Okamoto H Tanaka H Hasegawa Y Marumoto K Ito H Kuroda S |
| |
Affiliation: | Graduate School of Science, Tokyo Metropolitan University and PRESTO (JST), 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan. yamashit@comp.metro-u.ac.jp |
| |
Abstract: | We have succeeded in synthesizing the Ni(III) complexes doped by Co(III) ions, [Ni(1-x)Co(x)(chxn)(2)Br]Br(2) (x = 0, 0.043, 0.093, and 0.118) by using an electrochemical oxidation method. The single-crystal reflectance spectrum of x = 0.118 shows an intense CT band about 0.5 eV, which is lower than that of [Ni(chxn)(2)Br]Br(2) (1.3 eV). The single-crystal electrical conductivities at room temperature of these compounds increase with increase of the amounts of doping of Co(III) ions. In the ESR spectra, peak-to-peak line widths DeltaH(pp) at room temperature change about 600 G in [Ni(chxn)(2)Br]Br(2) to 200 G in x = 0.118. Such a large x dependence of DeltaH(pp) seems to be ascribed to the increasing contribution from the increasing Curie spins which have smaller line width. Therefore, we have tuned the electronic structures of quasi-one-dimensional bromo-bridged Ni(III) complexes with strong electron correlations by doping of Co(III) ions. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|