Tuning of Charge Density Wave Strengths by Competition between Electron-Phonon Interaction of PdII-PdIV Mixed-Valence States and Electron Correlation of NiIII States i

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• 作者：Masahiro Yamashita ; Tomohiko Ishii ; Hiroyuki Matsuzaka ; Toshio Manabe ; Takuya Kawashima ; Hiroshi Okamoto ; Hiroshi Kitagawa ; Tadaoki Mitani ; Kazuhiro Marumoto ; and Shin-ichi Kuroda
• 刊名：Inorganic Chemistry
• 出版年：1999
• 出版时间：November 1, 1999
• 年：1999
• 卷：38
• 期：22
• 页码：5124 - 5130
• 全文大小：136K
• 年卷期：v.38,no.22(November 1, 1999)
• ISSN：1520-510X

文摘

A series of single crystals of quasi-one-dimensional bromo-bridged Ni-Pd mixed-metal MX chain compoundsNi_1-xPd_x(chxn)₂Br₃ (chxn = 1(R),2(R)-diaminocyclohexane) have been obtained by electrochemical oxidationmethods of the mixed methanol solutions of parent Ni^II complex [Ni(chxn)₂]Br₂ and Pd^II complex [Pd(chxn)₂]Br₂with various mixing ratios. To investigate the competition between the electron correlation of the Ni^III states (orspin density wave states) and the electron-phonon interaction of the Pd^II-Pd^IV mixed-valence states (or chargedensity wave states) in the Ni-Pd mixed-metal compounds, IR, Raman, ESR, XP, and Auger spectra have beenmeasured. The IR, resonance Raman, XP, and Auger spectra show that the Pd^II-Pd^IV mixed-valence states areinfluenced and gradually approach the Pd^III states with the increase of the Ni^III components. This means that inthese compounds the electron-phonon interaction in the Pd^II-Pd^IV mixed-valence states is weakened with thestrong electron correlation in the Ni^III states.