Organically Modified Silica-Based Xerogels Derived from 3-Aminopropyltrimethoxysilane and 3-Isocyanatepropyltriethoxysilane through Carboxylic Acid Solvolysis |
|
| Journal | Materials Science Forum (Volumes 514 - 516) |
|---|---|
| Volume | Advanced Materials Forum III |
| Edited by | Paula Maria Vilarinho |
| Pages | 108-112 |
| DOI | 10.4028/www.scientific.net/MSF.514-516.108 |
| Citation | Lianshe Fu et al., 2006, Materials Science Forum, 514-516, 108 |
| 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 |
| 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. |
| Full Paper | 
Get the full paper by clicking here
|
First page example
