MOSSBAUER AND INFRARED SPECTROSCOPIC STUDIES OF NOVEL MIXED-VALENCE STATES IN COBALTOUS FERROCYANIDES AND FERRICYANIDES
MOSSBAUER AND INFRARED SPECTROSCOPIC STUDIES OF NOVEL MIXED-VALENCE STATES IN COBALTOUS FERROCYANIDES AND FERRICYANIDES
复制标题
DOI：
10.1007/bf02101072
复制
发表时间：
1990-07-01
影响因子：
--
通讯作者：
RONDON, S
中科院分区：
文献类型：
--
作者：
REGUERA, E;BERTRAN, JF;RONDON, S
新颖的混合价态已通过处理钴亚铁氰化物（Co+2FeII）和铁氰化物（Co+2FeIII）在臭氧流中获得。Co+2FeII的CN伸缩带位于2085 cm− 1，Co+2FeIII的CN伸缩带位于2160 cm− 1。在Co+2Fe II的臭氧化过程之后，检测到大约在2125 cm− 1处的强带。这个中间带必须对应于以下类型的混合价态：FeII−CN−Co2+− FeIII在Co+2FeII的臭氧化过程中“原位”记录的穆斯堡尔谱显示存在两种成分：一种具有异构体位移和四极分裂值的双峰，接近铁氰化钴，以及一种非常宽的混合价态。从臭氧化后Co+2Fe Ⅱ老化样品的穆斯堡尔谱和红外光谱可以看出，样品的初始态有一个弛豫过程，但混合价态是稳定的。
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−1for Co+2FeIIand at 2160 cm−1for Co+2FeIII. After the ozonization process of Co+2FeII, an intense band approximately at 2125 cm−1is detected. This intermediate band must correspond to a mixed valence state of the type: FeII−CN−Co2+−NC−FeIIIMössbauer spectra recorded “in situ” during the ozonization of Co+2FeIIshow 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+2FeIIafter ozonization, a relaxation process to the initial state of the samples is observed but the mixed valence state is stable.