EXAFS STUDY OF THE POLYNUCLEAR METALLORGANOSILOXANOLATES

被引：2
|
作者：
BELIAKOVA, OA [1 ]
ZUBAVICHUS, YV [1 ]
SLOVOKHOTOV, YL [1 ]
SHCHEGOLIKHINA, OI [1 ]
ZHDANOV, AA [1 ]
机构：
[1] RUSSIAN ACAD SCI, INST ORGANOELEMENT CPDS, MOSCOW 117813, RUSSIA
来源：
PHYSICA B | 1995年 / 208卷 / 1-4期
关键词：
D O I：
10.1016/0921-4526(94)00779-U
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Polynuclear cyclohexasiloxanolates M(6)L(2) and M(n)M'(6-n)L(2) (M, M' = Ni, Mn, Fe; L = [-SiPh(O)O-](6)) were studied as precursors of supported catalysts. Synchrotron EXAFS data (Novosibirsk VEPP-3 storage ring, 2.5 GeV, 120 mA, Si[111] monochromator) revealed three closest coordination spheres: M-O (2.0-2.2 Angstrom), M ... M (2.72-2.98 Angstrom) and M ... Si (3.31-3.40 Angstrom). Interatomic distances for M = Ni or Mn agree with the known X-ray structures of 'tubular' M(6)(mu(2)-O)(12) cores.
引用
收藏
页码：655 / 656
页数：2
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