Q(n) Species Distribution in K2O·2SiO2 Glass by 29Si Magic Angle Flipping NMR

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Q(n) species distribution in K2O.2SiO2 glass by 29Si magic angle flipping NMR.

Two-dimensional magic angle flipping (MAF) was employed to measure the Q((n)) distribution in a (29)Si-enriched potassium disilicate glass (K(2)O.2SiO(2)). Relative concentrations of [Q((4))] = 7.2 +/- 0.3%, [Q((3))] = 82.9 +/- 0.1%, and [Q((2))] = 9.8 +/- 0.6% were obtained. Using the thermodynamic model for Q((n)) species disproportionation, these relative concentrations yield an equilibrium ...

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Magic Angle Flipping NMR

Two-dimensional magic angle flipping (MAF) was employed to measure the Q(n) distribution in a 29Si enriched potassium disilicate glass (K2O · 2 SiO2). Relative concentrations of [Q(4)] = 7.2% ± 0.3%, [Q(3)] = 82.9% ± 0.1%, [Q(2)] = 9.8%± 0.6% were obtained. Using the thermodynamic model for Q(n) species disproportionation these relative concentrations yield an equilibrium constant k3 = 0.0103± ...

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ژورنال

عنوان ژورنال: The Journal of Physical Chemistry A

سال: 2010

ISSN: 1089-5639,1520-5215

DOI: 10.1021/jp100530m