Influence of alkali-metal cations on silicon exchange and silicon-29 spin relaxation in alkaline silicate solutions

A. V. McCormick; A. T. Bell; C. J. Radke

doi:10.1021/j100342a014

Influence of alkali-metal cations on silicon exchange and silicon-29 spin relaxation in alkaline silicate solutions

A. V. McCormick, A. T. Bell, C. J. Radke

Chemical Engineering and Materials Science

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Abstract

Selective and nonselective inversion NMR experiments were carried out to investigate the dynamics of Si exchange between silicate anions in alkaline silicate solutions. Rate coefficients for the Si exchange between monomer and dimer anions and between monomer, dimer, and cyclic trimer anions were determined as functions of alkali-metal cation size. The largest rate coefficient for Si exchange between monomer and dimer anions occurs for K⁺, whereas the largest rate coefficient for Si exchange between monomer, dimer, and cyclic trimer anions occurs for Na⁺. Cation size is also found to influence spin-lattice (T₁) and spin-spin relaxation (T₂) times.

Original language	English (US)
Pages (from-to)	1737-1741
Number of pages	5
Journal	Journal of physical chemistry
Volume	93
Issue number	5
DOIs	https://doi.org/10.1021/j100342a014
State	Published - Jan 1 1989

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title = "Influence of alkali-metal cations on silicon exchange and silicon-29 spin relaxation in alkaline silicate solutions",

abstract = "Selective and nonselective inversion NMR experiments were carried out to investigate the dynamics of Si exchange between silicate anions in alkaline silicate solutions. Rate coefficients for the Si exchange between monomer and dimer anions and between monomer, dimer, and cyclic trimer anions were determined as functions of alkali-metal cation size. The largest rate coefficient for Si exchange between monomer and dimer anions occurs for K+, whereas the largest rate coefficient for Si exchange between monomer, dimer, and cyclic trimer anions occurs for Na+. Cation size is also found to influence spin-lattice (T1) and spin-spin relaxation (T2) times.",

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year = "1989",

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AU - Radke, C. J.

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N2 - Selective and nonselective inversion NMR experiments were carried out to investigate the dynamics of Si exchange between silicate anions in alkaline silicate solutions. Rate coefficients for the Si exchange between monomer and dimer anions and between monomer, dimer, and cyclic trimer anions were determined as functions of alkali-metal cation size. The largest rate coefficient for Si exchange between monomer and dimer anions occurs for K+, whereas the largest rate coefficient for Si exchange between monomer, dimer, and cyclic trimer anions occurs for Na+. Cation size is also found to influence spin-lattice (T1) and spin-spin relaxation (T2) times.

AB - Selective and nonselective inversion NMR experiments were carried out to investigate the dynamics of Si exchange between silicate anions in alkaline silicate solutions. Rate coefficients for the Si exchange between monomer and dimer anions and between monomer, dimer, and cyclic trimer anions were determined as functions of alkali-metal cation size. The largest rate coefficient for Si exchange between monomer and dimer anions occurs for K+, whereas the largest rate coefficient for Si exchange between monomer, dimer, and cyclic trimer anions occurs for Na+. Cation size is also found to influence spin-lattice (T1) and spin-spin relaxation (T2) times.

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Influence of alkali-metal cations on silicon exchange and silicon-29 spin relaxation in alkaline silicate solutions

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