Stability of layered aluminum and magnesium organosilicates

被引：15
作者：
Moscofian, Andrea S. O. [1 ]
Silva, Cesar R. [1 ]
Airoldi, Claudio [1 ]
机构：
[1] Univ Estadual Campinas, Inst Quim, BR-13084971 Campinas, SP, Brazil
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2008年 / 107卷 / 1-2期
基金：
巴西圣保罗研究基金会;
关键词：
organosilicates; phyllosilicate; silsesquioxanes; hybrids; sol-gel; urea-alkoxysilanes;
D O I：
10.1016/j.micromeso.2007.05.047
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
New nanostructered layered inorganic-organic aluminum (Sil-Al) and magnesium (Sil-Mg) organosilicates - were prepared by a single step template sol-gel route under mild conditions, using a new alkoxysilane [(3-urea-dodecyl)propyl]triethoxysilane, containing embedded polar urea groups. The hybrids were characterized by elemental analysis, infrared spectroscopy, solid-state Si-29, C-13 and Al-27 nuclear magnetic resonance and X-ray diffraction. The XRD data showed that the magnesium hybrid material exhibits a lamellar structure similar to talc, a natural inorganic silicate. In order to employ these alternative sorbent materials for solid phase extraction applications, the chemical stability of the hybrids were investigated over a wide pH range varying from 2 to 12. (c) 2007 Elsevier Inc. All rights reserved.
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页码：113 / 120
页数：8
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