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Two-dimensional silicon-29 NMR studies of aqueous silicate solutions

✍ Scribed by Robin K Harris; Maxwell J O'Connor; Eirian H Curzon; Oliver W Howarth

Publisher
Elsevier Science
Year
1984
Weight
429 KB
Volume
57
Category
Article
ISSN
0022-2364

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πŸ“œ SIMILAR VOLUMES

Silicon-29 NMR study of the formation of
Silicon-29 NMR study of the formation of monomethoxysilicic acid in methanolic alkaline silicate solutions
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## Abstract Silicon‐29 NMR spectra were obtained for more than 20 aqueous alkaline silicate solutions containing methanol. A signal assigned to CH~3~OSi(OH)~3~ or one of its deprotonated congeners was studied in detail for the first time for the solution conditions involved. Its appearance was moni

Silicon-29 nuclear magnetic resonance st
Silicon-29 nuclear magnetic resonance studies of aqueous silicate solutions. 8 spin–lattice relaxation times and mechanisms
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The 29Si spin-lattice relaxation times, &(%), of the various silicate anions present in high-purity alkaline silicate solutions are reported. Regular silicate cages display the longest T,(29Si) values and, in the case of the cubic octamenc cage, an unexpectedly large nuclear Overhauser enhancement,

Quantitative silicon-29 NMR investigatio
Quantitative silicon-29 NMR investigations of highly concentrated high-ratio sodium silicate solutions
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## Abstract In concentrated alkaline sodium silicate solutions a consistent decrease in the amount of silicate monomer __Q__^0^, end‐groups Q^1^, cyclic trimer Q groups and middle groups Q^2^, and also branching groups in ring formations __Q__, is observed with increasing molar ratio of SiO~2~ to N

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Method for the quantification of silicon-29 NMR spectra, developed for viscous silicate solutions
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## Abstract A method is described for obtaining quantitative intensity data from solution‐state spectra by a combination of coaxial tubes and sample replacement to take account of spectrometer electronic effects. The protocol was applied to two sodium silicate solutions of high silica content, and