IV-T-5 Competition between Electron-Correlation in Ni(III) and Electron-Lattice Interaction in Pd(II)-Pd(IV) in Mixed-Metal MX-Chain, Ni_1-xPd_x(chxn)₂Br₃

Toshio MANABE, Takuya KAWASHIMA (Nagoya Univ.), Masahiro YAMASHITA (Nagoya Univ. and IMS), Hiroshi OKAMOTO (Tohoku Univ.), Hiroshi KITAGAWA, Tadaoki MITANI (JAIST), Makoto INOKUCHI and Kyuya YAKUSHI

[Synth. Met. 86, 2233 (1997)]

The electrical conductivities, IR, XPS and resonance Raman spectra of a series of Ni-Pd mixed-metal MX-chain compounds, Ni_1-xPd_x(chxn)₂Br₃ have been measured in order to investigate the competition between the electron-correlation in Ni(III) and the electron-lattice interaction in Pd(II)-Pd(IV) states. In these compounds, at x=0.4, the activation energy in electrical conductivity is minimized. And at x=0.4 or below, the (nu) N-H does not split, while at x with larger than 0.5, (nu) N-H shows triplet. This result suggests that the Pd(II)-Pd(IV) mixed-valence states are effectively influenced by Ni(III) states, approaching toward the Pd(III) states.

back to CONTENTS of Research Activities IV