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Detection of multiple boron sites in glasses by 11B satellite transition nuclear magnetic resonance spectroscopy

✍ Scribed by C. Jäger; K. Herzog; B. Thomas; M. Feike; G. Kunath-Fandrei

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
1002 KB
Volume
5
Category
Article
ISSN
0926-2040

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✦ Synopsis

The magic-angle spinning sidebands of the satellite transition (ST, m = +/- 3/2 <==> +/- 1/2) for 11B nuclear magnetic resonance (11B ST spectroscopy) have been used to detect multiple boron sites in Na2O-B2O3-SiO2 glasses. The experimental details and data analysis are described, how multiple BO4 and BO3 units can be distinguished using standard magic-angle spinning. For a 16Na2O-30B2O3-53.9SiO2 glass (0.1 MnO) two BO4 units with chemical shifts of -2.5 and 0 ppm were found which differ considerably in their quadrupole interaction. Besides this we found three different BO3 units with approximate chemical shifts of 17, 15, and 19 ppm. The results are compared with earlier measurements.

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