Synthesis and Characterization of Tris(mercaptomethyl)(2,4,6-trimethoxyphenyl)silane and Its Use for the Immobilization of the Si(CH2SH)3 Group on Silica via an Si−O−
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- 作者：Dennis Troegel ; Tim Walter ; Christian Burschka ; Reinhold Tacke
- 刊名：Organometallics
- 出版年：2009
- 出版时间：May 11, 2009
- 年：2009
- 卷：28
- 期：9
- 页码：2756-2761
- 全文大小：171K
- 年卷期：v.28,no.9(May 11, 2009)
- ISSN：1520-6041
文摘
The tris(mercaptomethyl)silane RSi(CH2SH)3 (2; R = 2,4,6-trimethoxyphenyl) was synthesized, starting from the corresponding tris(chloromethyl)silane RSi(CH2Cl)3 (1). Compound 2 was characterized by elemental analysis, NMR studies (1H, 13C, 29Si), and single-crystal X-ray diffraction. The title compound was used as a silylation reagent for the immobilization of the Si(CH2SH)3 group on silica surfaces via an Si−O−Si linkage. Furthermore, an Si(CH2SH)3-containing silica material was synthesized that contains additional Si(CH2SH)2 units that are covalently linked by two Si−O−Si bridges. The silylated silica materials (characterized by solid-state 29Si and 13C NMR spectroscopy) are of interest for the immobilization of transition metals on silica surfaces via the Si(CH2SH)3 and Si(CH2SH)2 chelate ligands. This was demonstrated exemplarily by the Zn2+ uptake from aqueous zinc(II) sulfate solutions.