Novel route to silanetriols and silanediols based on acetoxysilylalkoxides

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• 作者：Miriam de J. Velá ; squez-Herná ; ndez ; Aaró ; n Torres-Huerta ; Uvaldo Herná ; ndez-Balderas ; Diego Martí ; nez-Otero ; Alejandra Nú ; ñ ; ez-Pineda ; Vojtech Jancik ; ^{vjancik@unam.mx}
• 关键词：Silanols ; Hydrolysis ; Acetoxysilylalkoxides ; Structural study ; CO2 conversion
• 刊名：Polyhedron
• 出版年：2017
• 出版时间：28 January 2017
• 年：2017
• 卷：122
• 期：Complete
• 页码：161-171
• 全文大小：1995 K
• 卷排序：122

文摘

An easy and versatile method for the preparation of molecular alkoxysilanols as molecular organosilicates based on acetoxysilylalkoxides (ASA, (RO)(tBuO)nSi(OAc)3−n or (AcO)3−n(tBuO)nSi-O-R-O-Si(OtBu)n(OAc)3−n, R = organic group; n = 0 or 1) is presented. These ASA precursors are prepared from silicon tetraacetate and suitable alcohols and are cleanly hydrolyzed in water to the corresponding alkoxysilanols in the absence of a base or organic solvents. The compounds were characterized by common spectroscopic methods including X-ray structural analysis. Alkoxysilanols were tested in the catalytic conversion of CO2 to styrene carbonate and show quantitative conversion within 15 h at 60 °C and 1 atm of CO2.