Organically Modified Silica-Based Xerogels Derived from 3-Aminopropyltrimethoxysilane and 3-Isocyanatepropyltriethoxysilane through Carboxylic Acid Solvolysis

Lianshe Fu; Rute A. Sá Ferreira; Sonia S. Nobre; Luís D. Carlos; João  Rocha

doi:10.4028/www.scientific.net/MSF.514-516.108

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HomeMaterials Science ForumMaterials Science Forum Vols. 514-516Organically Modified Silica-Based Xerogels Derived...

Organically Modified Silica-Based Xerogels Derived from 3-Aminopropyltrimethoxysilane and 3-Isocyanatepropyltriethoxysilane through Carboxylic Acid Solvolysis

Abstract:

Organically-modified silica xerogels from 3-aminopropyltrimethoxysilane (APTES) and 3-isocyanatepropyltriethoxysilane (ICPTES) have been synthesized through carboxylic acid (formic acid, acetic acid and valeric acid) solvolysis. The resulting hybrid materials have been characterized by powder X-ray diffraction, mid-infrared spectroscopy, 29Si and 13C nuclear magnetic resonance, and photoluminescence spectroscopy. The results show that urea cross-links have been formed in these hybrids. The luminescence features depend on the selected carboxylic acids. For example, comparatively to the hybrids derived from formic and acetic acid solvolysis, valeric acid shows a red-shift of the emission features.

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Materials Science Forum (Volumes 514-516)

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108-112

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https://doi.org/10.4028/www.scientific.net/MSF.514-516.108

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Online since:

May 2006

Authors:

Lianshe Fu, Rute A. Sá Ferreira, Sonia S. Nobre, Luís D. Carlos, João Rocha

Keywords:

3-Aminopropyl Triethoxysilane, 3-Isocyanatepropyltriethoxysilane, Carboxylic Acid, Organic/Inorganic Hybrid Materials, Solvolysis

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