Thermal analysis of salts from 4-nitrophenol and aliphatic amines

Autor:	Simone Rosa da Silveira Lazzarotto, Francine Furtado Nachtigall, Geisa Liandra de Andrade de Siqueira, Marcelo Lazzarotto, Márcio Lazzarotto
Rok vydání:	2019
Předmět:	chemistry.chemical_classification Inorganic chemistry Ionic bonding Salt (chemistry) 4-Nitrophenol 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Endothermic process Decomposition 010406 physical chemistry 0104 chemical sciences chemistry.chemical_compound chemistry Amine gas treating Ammonium Physical and Theoretical Chemistry 0210 nano-technology Thermal analysis
Zdroj:	Journal of Thermal Analysis and Calorimetry. 138:351-357
ISSN:	1588-2926 1388-6150
DOI:	10.1007/s10973-019-08205-9
Popis:	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.
Databáze:	OpenAIRE
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