差示FT-Raman和11B NMR方法研究过饱和镁硼酸盐的溶液结构

Supersaturated Aqueous Magnesium Borate Solutions,a Structural Study by Difference FT-Raman and 11B NMR Spectroscopy

中文关键词:  镁硼酸盐  过饱和溶液  差示FT-Raman光谱法  ^11B  NMR光谱法

英文关键词:Magnesium borate,Supersaturated solutions,Differential FT-Raman spectra,()~(11)B NMR spectra.

中文摘要:

      用差示FT-Raman和11B NMR光谱研究了MgB6O10·7.5H2O、MgB4O7·9H2O、Mg2B6O10·15H2O三种镁硼酸盐饱和和过饱和溶液的结构机理,其结果表明饱和溶液和过饱和溶液中均存在B(OH)3、B(OH)-4、B3O3(OH)-4、B5O6(OH)4-粒子.镁硼酸盐的结晶过程是一个复杂的动力学平衡过程.

英文摘要:

      Three kinds of supersaturated aqueous magnesium borate solutions were prepared.The differential FT-Raman and 11B NMR spectra of supersaturated and saturated aqueous magnesium borate solutions were recorded.The B(OH)3,B(OH)-4,B3O3(OH)-4,and B5O6(OH)-4 were detected in supersaturated and saturated MgB6O10·7.5H2O,MgB4O7·9H2O,and Mg2B6O11·15H2O solutions.There were no simple crystallization mechanisms for these magnesium borates,complicated dynamic equilibria among the boron species in solutions existed during the precipitation of magnesium borates.