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Article
New Protonated Thioborate Glasses in the xH2S + (1 − x)B2S3 Series
The Journal of Physical Chemistry B
  • Annamalai Karthikeyan, Iowa State University
  • Chad A. Martindale, Iowa State University
  • Steve W. Martin, Iowa State University
Document Type
Article
Publication Date
4-17-2003
DOI
10.1021/jp0267095
Abstract

A new series of anhydrous protonated chalcogenide glasses, xH2S + (1 − x)B2S3, analogous to alkali-modified glasses, have been prepared. The preparation of these glasses was carried out in multiple steps. First crystalline meta-thioboric acid, c-(HBS2)3, was prepared from vitreous boron sulfide, v-B2S3. c-(HBS2)3 was then used as a precursor for protonation to prepare a series of xH2S + (1 − x)B2S3 samples with 0.0 ≤ x ≤ 0.5. The glass formation region of this system was found to be 0.0 ≤ x ≤ 0.25. The density and glass-transition temperature (Tg) of the samples were measured. While a substantial decrease in Tg of the protonated glasses has been observed, there are insignificant changes in the density of the glasses. The IR and NMR spectra of the samples in the region 0.0 ≤ x ≤ 0.5 suggest that no tetrahedral borons are formed with the incorporation of protons. The characterization shows that these materials are unique and exhibit no borate anomaly as in the alkali-modified glasses.

Comments

Reprinted with permission from The Journal of Physical Chemistry B 107 (2003): 3384–3389, doi:10.1021/jp0267095. Copyright 2003 American Chemical Society.

Copyright Owner
American Chemical Society
Language
en
File Format
application/pdf
Citation Information
Annamalai Karthikeyan, Chad A. Martindale and Steve W. Martin. "New Protonated Thioborate Glasses in the xH2S + (1 − x)B2S3 Series" The Journal of Physical Chemistry B Vol. 107 Iss. 15 (2003) p. 3384 - 3389
Available at: http://works.bepress.com/steve_martin/30/