Silicon-29 NMR Study of Alkaline Aqueous and Alcoholic Tri-butylmethyl Ammonium (TBMA) Silicate Solutions

被引：8
|
作者：
Goudarzi, Nasser [1 ]
Chamjangali, M. Arab [1 ]
Bagherian, G. [1 ]
机构：
[1] Shahrood Univ Technol, Fac Chem, Shahrood, Iran
来源：
SPECTROSCOPY LETTERS | 2009年 / 42卷 / 01期
关键词：
alcoholic silicate solution; silicate species; 29Si NMR spectroscopy; structure directing; tri-butylmethyl ammonium; NUCLEAR MAGNETIC-RESONANCE; RELAXATION; ANIONS; EQUILIBRIA; CHEMISTRY; EXCHANGE; PATTERNS; WATER;
D O I：
10.1080/00387010802428898
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Silicon-29 NMR spectroscopy was used to characterize aqueous and alcoholic alkaline solutions of tri-butylmethyl ammonium (TBMA) silicates. The effect of TBMA cation on the equilibrium of silicate oligomers in aqueous alkaline silicate solutions was investigated using 29Si NMR spectra. It was found that TBMA cation has a structure directing role and directs the silicate species to form minor amounts of silicate anion in the presence of high concentration of silicon. Silicon-29 NMR spectra of TBMA silicate solutions indicate that considerable changes occurred by changing the Si/TBMA ratio. The distribution of silicate species was affected by the presence of the alcohols, specifically methanol.
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页码：20 / 27
页数：8
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