VIBRATIONAL INVESTIGATIONS OF POLYOXOMETALATES .2. EVIDENCE FOR ANION ANION INTERACTIONS IN MOLYBDENUM(VI) AND TUNGSTEN(VI) COMPOUNDS RELATED TO THE KEGGIN STRUCTURE
VIBRATIONAL INVESTIGATIONS OF POLYOXOMETALATES .2. EVIDENCE FOR ANION ANION INTERACTIONS IN MOLYBDENUM(VI) AND TUNGSTEN(VI) COMPOUNDS RELATED TO THE KEGGIN STRUCTURE
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DOI：
10.1021/ic00144a006
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发表时间：
1983-01-01
影响因子：
4.6
通讯作者：
THOUVENOT, R
中科院分区：
文献类型：
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作者：
ROCCHICCIOLIDELTCHEFF, C;FOURNIER, M;THOUVENOT, R
对α-和 ß-^^"" 多氧阴离子振动光谱的阳离子尺寸效应进行了系统研究（X= Bnl、SiIV、GeIV、Pv、Asv；M= MoVI、WVI）。 M-Od 伸缩频率随着阳离子尺寸的增加而降低。这归因于静电类型的阴离子-阴离子相互作用的减弱。仅当阴离子氧-氧距离长达 6 Á（四丁基铵 (TBA) 盐）时，这些相互作用才会消失。对于这些聚阴离子，孤立阴离子的近似严格适用于大抗衡离子，例如 TBA。此外，一些聚阴离子的制备方法也是首次描述。
A systematic study of the cation-size effect on the vibrational spectra of a-and ß-^^"" polyoxoanions has been performed (X= Bnl, SiIV, GeIV, Pv, Asv; M= MoVI, WVI). The M-Od stretching frequencies decrease as the cation size increases. This is attributed to a weakening of anion-anion interactions of the electrostatic type. These interactions vanish for only interanionic oxygen-oxygen distances as long as 6 Á (tetrabutylammonium (TBA) salts). For these polyanions, the approximation for the isolated anion strictly holds with large counterionssuch as TBA. In addition, some preparations of polyanions are described for the first time.