کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1337933 | 979652 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High stable sandwich-type polyoxometallates based on A-β-SiW9O3410-. Synthesis, chemical properties and characterization of [(A-β-SiW9O34)2(MOH2)3CO3]13â (M = Y3+ and Yb3+)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی معدنی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: High stable sandwich-type polyoxometallates based on A-β-SiW9O3410-. Synthesis, chemical properties and characterization of [(A-β-SiW9O34)2(MOH2)3CO3]13â (M = Y3+ and Yb3+) High stable sandwich-type polyoxometallates based on A-β-SiW9O3410-. Synthesis, chemical properties and characterization of [(A-β-SiW9O34)2(MOH2)3CO3]13â (M = Y3+ and Yb3+)](/preview/png/1337933.png)
چکیده انگلیسی
Highly hydrolytic and thermally stable sandwich-type polyoxometallates of [(A-β-SiW9O34)2(MOH2)3CO3]13â (M = Y3+ and Yb3+) have been synthesized and characterized by elemental analysis, IR, 13C and 29Si NMR, UV-Vis spectroscopy, TGA, DSC and single crystal structure analysis. The crystal structures of the complexes consist of two lacunary A-β-SiW9O3410- Keggin moieties which are linked by a (H2OMO)3C belt into an assembly of virtual C2 symmetry. Each M3+ ion adopts a mono-capped trigonal prismatic coordination. The hydrolytic and thermal stability conditions of the complexes and proving reasons for the retention of the isomeric form of the trilacunary A-β-SiW9O3410- ligand upon complexation are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polyhedron - Volume 27, Issue 7, 20 May 2008, Pages 1855-1859
Journal: Polyhedron - Volume 27, Issue 7, 20 May 2008, Pages 1855-1859
نویسندگان
Roushan Khoshnavazi, Rahmat Sadeghi, Liela Bahrami,