EFFECTS OF ORGANIC AND ALKALI-METAL CATIONS ON THE DISTRIBUTION OF SILICATE ANIONS IN AQUEOUS-SOLUTIONS

被引：39

作者：

HENDRICKS, WM

BELL, AT

RADKE, CJ

机构：

[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720

[2] UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 23期

关键词：

D O I：

10.1021/j100176a087

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effects of tetraalkylammonium (TAA) cations on the equilibrium distribution of silicate oligomers in aqueous alkaline silicate solutions have been investigated using Si-29 NMR spectroscopy. The results indicate that intrinsic differences exist in the interactions involving TAA cations and those involving alkali metal cations. The large size of the TAA cations precludes significant ion pairing; however, hydrophobic solvation and ion crowding play important roles in determining silicate speciation at equilibrium.

引用

页码：9513 / 9518

页数：6

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