Synthesis, single-crystal structural determination and solution characterization of a new sandwich-type cadmium-containing heteropolytungstate
2003; Elsevier BV; Volume: 22; Issue: 7 Linguagem: Inglês
10.1016/s0277-5387(03)00024-x
ISSN1873-3719
AutoresMohammad Alizadeh, Hossein Razavi, Farokhzad Mohammadi Zonoz, M.R Mohammadi,
Tópico(s)Advanced Nanomaterials in Catalysis
ResumoThe novel dimeric phosphotungstate, [P2W18Cd4(H2O)2O68]10−, has been synthesized by an unusual reaction of A-β-Na8HPW9O34 with cadmium nitrate under controlled pH conditions. This compound has also been synthesized by the reaction of B-α-Na8HPW9O34 with cadmium nitrate. The unambiguous characterization of B-α-[P2W18Cd4(H2O)2O68]10− was accomplished by means of elemental analysis, IR, 31P and 113Cd NMR spectroscopy, and confirmed by a single crystal X-ray structural analysis of the NH4 + salt. The heteropolyanion consist of two lacunary B-α-[PW9O34]9− Keggin moieties linked via a rhomboid Cd4O16 group leading to a sandwich-type structure. Acidification of this anion, like other P2W18M4O68 10− (M=Co, Zn, …) species, forms the PW12O40 3− anions as the main product.
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