Description of the Intermediate Length Scale Structural Motifs in Sodium Vanado-phosphate Glasses by Magnetic Resonance Spectroscopies

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• 作者：Gregory Tricot ; Herv茅 Vezin
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：January 24, 2013
• 年：2013
• 卷：117
• 期：3
• 页码：1421-1427
• 全文大小：332K
• 年卷期：v.117,no.3(January 24, 2013)
• ISSN：1932-7455

文摘

For the first time, the local and medium range orders in sodium vanado-phosphate glasses have been investigated by advanced magnetic resonance spectroscopy methods. One- and two-dimensional ³¹P/⁵¹V magic angle spinning nuclear magnetic resonance techniques (³¹P(⁵¹V) REAPDOR and ⁵¹V(³¹P) D-HMQC) have been used to monitor the formation of P鈥揙鈥揤⁵⁺ bonds and to provide the first accurate description of the intermediate length scale structural motifs in these glasses. The structural model has been completed by the investigation of the chemical environment of the V⁴⁺ ions (produced through the partial reduction of V⁵⁺ during the melting stage of the glass preparation) using standard continuous wave and advanced pulsed electron paramagnetic resonance techniques (HYSCORE). Finally, the combination of both sets of data leads to the first complete and precise structural model of the alkali vanado-phosphate glass system.