Structural properties of sodium phosphate glasses from23Na → 31P cross-polarization NMR

S. Prabakar; R. M. Wenslow; K. T. Mueller

doi:10.1016/S0022-3093(99)00624-9

Structural properties of sodium phosphate glasses from²³Na → ³¹P cross-polarization NMR

S. Prabakar
, R. M. Wenslow
, K. T. Mueller

Chemistry

Research output: Contribution to journal › Conference article › peer-review

34 Scopus citations

Abstract

One-dimensional heteronuclear correlation solid-state nuclear magnetic resonance (NMR) experiments are utilized to determine local structural changes in sodium phosphate glass compositions with ratios of Na/P of 0.25, 0.78, 1 and 1.3. Glasses containing only Q² (metaphosphate composition), Q² and Q¹ (between meta- and pyrophosphate compositions), and Q³ and Q² (ultraphosphate region) have been investigated. 23Na -31P cross-polarization magic-anglespinning (CPMAS) NMR detects direct interactions between distinct phosphorus sites and sodium nuclei in the second coordination sphere. Variable-contact CPMAS experiments provide additional information about association of ²³Na nuclei with specific phosphate sites. Time constants describing the transfer of magnetization from sodium to phosphorus nuclei are found to be affected by sodium ion concentration in ultraphosphate glasses, and an important finding of these investigations is the degree of correlation of sodium ions with Q³ sites in ultraphosphate glasses.

Original language	English (US)
Pages (from-to)	82-93
Number of pages	12
Journal	Journal of Non-Crystalline Solids
Volume	263-264
DOIs	https://doi.org/10.1016/S0022-3093(99)00624-9
State	Published - 2000
Event	The 15th University Conference on Glass Science: Structure, Properties and Applications of Phosphate and Phosphate-Containing Glasses - Rolla, MO, United States Duration: Jun 20 1999 → Jun 23 1999

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Materials Chemistry

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10.1016/S0022-3093(99)00624-9

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@article{b2616b9fa112442398b3cf9c2d730089,

title = "Structural properties of sodium phosphate glasses from23Na → 31P cross-polarization NMR",

abstract = "One-dimensional heteronuclear correlation solid-state nuclear magnetic resonance (NMR) experiments are utilized to determine local structural changes in sodium phosphate glass compositions with ratios of Na/P of 0.25, 0.78, 1 and 1.3. Glasses containing only Q2 (metaphosphate composition), Q2 and Q1 (between meta- and pyrophosphate compositions), and Q3 and Q2 (ultraphosphate region) have been investigated. 23Na -31P cross-polarization magic-anglespinning (CPMAS) NMR detects direct interactions between distinct phosphorus sites and sodium nuclei in the second coordination sphere. Variable-contact CPMAS experiments provide additional information about association of 23Na nuclei with specific phosphate sites. Time constants describing the transfer of magnetization from sodium to phosphorus nuclei are found to be affected by sodium ion concentration in ultraphosphate glasses, and an important finding of these investigations is the degree of correlation of sodium ions with Q3 sites in ultraphosphate glasses.",

author = "S. Prabakar and Wenslow, \{R. M.\} and Mueller, \{K. T.\}",

note = "Funding Information: The authors acknowledge partial support of this work by the Arnold and Mabel Beckman Foundation. Acknowledgment is made to the Donors of the Petroleum Research Fund, administered by the American Chemical Society, for partial support of this research. This report is also based upon work supported by the National Science Foundation under Grant No. DMR-9458053 and Grant No. DMR-9413674. ; The 15th University Conference on Glass Science: Structure, Properties and Applications of Phosphate and Phosphate-Containing Glasses ; Conference date: 20-06-1999 Through 23-06-1999",

year = "2000",

doi = "10.1016/S0022-3093(99)00624-9",

language = "English (US)",

volume = "263-264",

pages = "82--93",

journal = "Journal of Non-Crystalline Solids",

issn = "0022-3093",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Structural properties of sodium phosphate glasses from23Na → 31P cross-polarization NMR

AU - Prabakar, S.

AU - Wenslow, R. M.

AU - Mueller, K. T.

N1 - Funding Information: The authors acknowledge partial support of this work by the Arnold and Mabel Beckman Foundation. Acknowledgment is made to the Donors of the Petroleum Research Fund, administered by the American Chemical Society, for partial support of this research. This report is also based upon work supported by the National Science Foundation under Grant No. DMR-9458053 and Grant No. DMR-9413674.

PY - 2000

Y1 - 2000

N2 - One-dimensional heteronuclear correlation solid-state nuclear magnetic resonance (NMR) experiments are utilized to determine local structural changes in sodium phosphate glass compositions with ratios of Na/P of 0.25, 0.78, 1 and 1.3. Glasses containing only Q2 (metaphosphate composition), Q2 and Q1 (between meta- and pyrophosphate compositions), and Q3 and Q2 (ultraphosphate region) have been investigated. 23Na -31P cross-polarization magic-anglespinning (CPMAS) NMR detects direct interactions between distinct phosphorus sites and sodium nuclei in the second coordination sphere. Variable-contact CPMAS experiments provide additional information about association of 23Na nuclei with specific phosphate sites. Time constants describing the transfer of magnetization from sodium to phosphorus nuclei are found to be affected by sodium ion concentration in ultraphosphate glasses, and an important finding of these investigations is the degree of correlation of sodium ions with Q3 sites in ultraphosphate glasses.

AB - One-dimensional heteronuclear correlation solid-state nuclear magnetic resonance (NMR) experiments are utilized to determine local structural changes in sodium phosphate glass compositions with ratios of Na/P of 0.25, 0.78, 1 and 1.3. Glasses containing only Q2 (metaphosphate composition), Q2 and Q1 (between meta- and pyrophosphate compositions), and Q3 and Q2 (ultraphosphate region) have been investigated. 23Na -31P cross-polarization magic-anglespinning (CPMAS) NMR detects direct interactions between distinct phosphorus sites and sodium nuclei in the second coordination sphere. Variable-contact CPMAS experiments provide additional information about association of 23Na nuclei with specific phosphate sites. Time constants describing the transfer of magnetization from sodium to phosphorus nuclei are found to be affected by sodium ion concentration in ultraphosphate glasses, and an important finding of these investigations is the degree of correlation of sodium ions with Q3 sites in ultraphosphate glasses.

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U2 - 10.1016/S0022-3093(99)00624-9

DO - 10.1016/S0022-3093(99)00624-9

M3 - Conference article

AN - SCOPUS:0033905874

SN - 0022-3093

VL - 263-264

SP - 82

EP - 93

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

T2 - The 15th University Conference on Glass Science: Structure, Properties and Applications of Phosphate and Phosphate-Containing Glasses

Y2 - 20 June 1999 through 23 June 1999

ER -

Structural properties of sodium phosphate glasses from²³Na → ³¹P cross-polarization NMR

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