Determination of the bond-angle distribution in vitreous B2O3 by B-11 double rotation (DOR) NMR spectroscopy
Hung, I., Howes, A. P., Parkinson, B. G., Anupõld, Tiit, Samoson, A., Brown, Steven P., Harrison, P. F., Holland, D. and Dupree, Ray. (2009) Determination of the bond-angle distribution in vitreous B2O3 by B-11 double rotation (DOR) NMR spectroscopy. Journal of Solid State Chemistry, Vol.182 (No.9). pp. 2402-2408. ISSN 0022-4596Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/j.jssc.2009.06.025
The B-O-B bond angle distributions for both ring and non-ring boron sites in vitreous B2O3 have been determined by B-11 double rotation (DOR) NMR and multiple-quantum (MQ) DOR NMR. The [B3O6] boroxol rings are observed to have a mean internal B-O-B angle of 120.0+/-0.7 degrees with a small standard deviation, sigma(R) = 3.2+/-0.4 degrees, indicating that the rings are near-perfect planar, hexagonal structures. The rings are linked predominantly by non-ring [BO3] units, which share oxygens with the boroxol ring, with a mean B-ring-O-Bnon-ring angle of 135.1+/-0.6 degrees and sigma(NR) = 6.7+/-0.4 degrees. In addition, the fraction of boron atoms, f, which reside in the boroxol rings has been measured for this sample as f = 0.73+/-0.01. (C) 2009 Elsevier Inc. All rights reserved.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Journal of Solid State Chemistry|
|Official Date:||September 2009|
|Number of Pages:||7|
|Page Range:||pp. 2402-2408|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||Leverhulme Trust (LT), Engineering and Physical Sciences Research Council (EPSRC), Biotechnology and Biological Sciences Research Council (Great Britain) (BBSRC), University of Warwick|
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