Bismuth derivatives of 2,3-dicarboxypyrazine and 3,5-dicarboxypyrazole as precursors for bismuth oxide based materials
(1998) New Journal of Chemistry — Vol. 22, n° 9, p. 973-976 (1998)
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- Authors
Devillers, Michel 
- Abstract
- Depending on the experimental conditions, different bismuth derivatives of 2,3-dicarboxypyrazine (2,3-H(2)pzdc) were obtained, corresponding to the compositions Bi(2,3-Hpzdc)(3). 2H(2)O (4) and Bi(2,3-Hpzdc)(2). OH (5). In line with the analytical results and the infrared spectra, high resolution NMR studies (DMSO - d(6)) of anhydrous Bi(2,3Hpzdc)(3) (4a) confirmed unequivocally the presence of one free carboxylic acid in the structure. Thermal degradation of 4a in air proceeds in three steps and results in the formation of alpha-Bi2O3 at moderate temperature (451 degrees C). A bismuth derivative of 3,5-dicarboxypyrazole (3,5-H(3)Dcp) corresponding to the formula Bi-2(3,5-Dcp)(2). nH(2)O (3) was obtained from bismuth nitrate and the dicarboxylic acid in hot water. It decomposes into alpha-Bi2O3 when heated in air at 385 degrees C. The starting compounds and their thermal degradation products were also examined with X-ray photoelectron spectroscopy.
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Citations
Wenkin, M., Touillaux, R., & Devillers, M. (1998). Bismuth derivatives of 2,3-dicarboxypyrazine and 3,5-dicarboxypyrazole as precursors for bismuth oxide based materials. New Journal of Chemistry, 22(9), 973-976. https://doi.org/10.1039/a801161c (Original work published 1998)