20722-39-8Relevant academic research and scientific papers
Thermal analysis of salts from 4-nitrophenol and aliphatic amines
Lazzarotto, Márcio,Nachtigall, Francine Furtado,de Siqueira, Geisa Liandra de Andrade,da Silveira Lazzarotto, Simone Rosa,Lazzarotto, Marcelo
, p. 351 - 357 (2019)
Solid samples obtained from 4-nitrophenol and aliphatic amines, in excess of amine, were submitted to thermal analysis. The TGA/DTA showed two endothermic events, with exception of tert-butylamine, which showed three endothermic peaks. The first event was the melting of the ionic salt, which temperature does not follow a pattern, and is maxim for ethylammonium minimal for butylammonium salt. For methylammonium and ethylammonium, the fusion is followed by mass loss corresponding to one amine by 4-nitrophenol, while for the others ammonium salts, this event marks the beginning of the mass variation, that is maintained until the decomposition of the 4-nitrophenol at 485?K. The temperature of the event depends of the length of the chain of the amine, while the second occurs at the same temperature for all amines.
