P-T phase diagram and Au valence state of the perovskite-type Au mixed-valence complexes M2[AuIX2][AuIIIX4] (M = K, Rb, Cs; X = Cl, Br, I)

被引：15

作者：

Kojima, N ^{[1
]}

Matsushita, N ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Arts & Sci, Dept Basic Sci, Meguro Ku, Tokyo 1538902, Japan

来源：

COORDINATION CHEMISTRY REVIEWS | 2000年 / 198卷

关键词：

Au complex; mixed-valence; valence transition; perovskite structure; bipolaron; P-T phase diagram;

D O I：

10.1016/S0010-8545(99)00195-2

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

M-2[(AuX2)-X-I][(AuX4)-X-111] (M = K, Rb, Cs; X = Cl, Br, I) are perovskite-type gold mixed-valence complexes, In this review, we describe their structural P-T phase diagram, the pressure induced Au valence transition from the Au-I,Au- III state to the Au-II one, which is coupled with a structural phase transition. The metallic cubic phase appearing under high pressure and high temperature can be obtained as a metastable phase even at ambient pressure and room temperature. In the pressure region below the Au valence transition, Cs-2[(AuX2)-X-1][(AuX4)-X-III] (X = Cl, Br, I) show metallic behavior, which is attributed to the Au valence-fluctuation. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：251 / 263

页数：13

共 30 条

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