MOSSBAUER AND INFRARED SPECTROSCOPIC STUDIES OF NOVEL MIXED-VALENCE STATES IN COBALTOUS FERROCYANIDES AND FERRICYANIDES

被引：45

作者：

REGUERA, E ^{[1
]}

BERTRAN, JF ^{[1
]}

DIAZ, C ^{[1
]}

BLANCO, J ^{[1
]}

RONDON, S ^{[1
]}

机构：

[1] APPL STUDY CTR NUCL ENERGY,HAVANA,CUBA

来源：

HYPERFINE INTERACTIONS | 1990年 / 53卷 / 1-4期

关键词：

D O I：

10.1007/BF02101072

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Novel mixed valence states have been obtained by the treatment of cobaltous ferrocyanides (Co+2FeII) and ferricyanides (Co+2FeIII) in an ozone flow. The CN stretching bands occur at 2085 cm-1 for Co+2FeII and at 2160 cm-1 for Co+2FeIII. After the ozonization process of Co+2FeII, an intense band approximately at 2125 cm-1 is detected. This intermediate band must correspond to a mixed valence state of the type: FeII-CN-Co2+-NC-FeIII Mössbauer spectra recorded "in situ" during the ozonization of Co+2FeII show the presence of two components: a doublet with isomer shift and quadrupole splitting values close to the cobalti ferricyanide and a very broad line for the mixed valence state. From the Mössbauer and infrared spectra of the aged samples of the Co+2FeII after ozonization, a relaxation process to the initial state of the samples is observed but the mixed valence state is stable. © 1990 J.C. Baltzer AG, Scientific Publishing Company.

引用

页码：391 / 395

页数：5