Artículos de revistas
Comportamento térmico do 8-quinolinol e seus nitro-derivados
Fecha
2001-10-01Registro en:
Química Nova. Sociedade Brasileira de Química, v. 24, n. 5, p. 599-603, 2001.
0100-4042
10.1590/S0100-40422001000500005
S0100-40422001000500005
S0100-40422001000500005.pdf
7471310113999140
8498310891810082
0000-0002-7984-5908
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
The compounds 5-nitro-8-quinolinol and 5,7-dinitro-8-quinolinol were obtained by nitration of the chelant 8-quinolinol. The compounds were characterized through EA, MNR, XRD, IR, TG, DTA and DSC. It was verified through thermal analysis that the compounds show consecutive processes of sublimation, fusion and vaporization. During the vaporization process, partial thermal decomposition was observed, with formation of carbonaceous residues. Considering a slower heating rate, the sublimation is the prevalent process to the nitro-derivatives while the vaporization is the main process to 8-quinolinol. The thermal stability follows the decreasing order from 5,7-dinitro-8-quinolinol to 5-nitro-8-quinolinol to 8-quinolinol.