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Doctoral Thesis
DOI
https://doi.org/10.11606/T.75.2016.tde-09032016-135907
Document
Author
Full name
Glauco Lini Perpetuo
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2016
Supervisor
Committee
Chierice, Gilberto Orivaldo (President)
Silva Filho, Luiz Carlos da
Bannach, Gilbert
Legendre, Alexandre de Oliveira
Nunes, Ronaldo Spezia
Title in Portuguese
Estudo termoanalítico e caracterização no estado sólido da interação química entre cetoprofeno e alguns compostos orgânicos
Keywords in Portuguese
Cetoprofeno
cocristais
DSC
PLTM
Abstract in Portuguese
Neste trabalho, foi realizado o estudo termoanalítico e a caracterização no estado sólido da interação química entre o cetoprofeno (CET) e alguns compostos orgânicos (benzamida (BA), picolinamida (PA), nicotinamida (NA), isonicotinamida (INA), pirazinamida (PZA), ácido salícílico (SA) e ácido benzoico (BA)), visando a obtenção de cocristais. A mecanoquímica foi utilizada como método de preparação dos compostos sólidos, e os mesmos foram analisados por calorimetria exploratória diferencial (DSC), espectroscopia de infravermelho com transformadas de Fourier (FTIR), e difração de raios X de pó (XRPD). A escolha dos compostostos orgânicos (co-formadores) foi baseada em suas estruturas moleculares, de modo que aqueles selecionados para esse trabalho possuíssem uma estrutura molecular capaz de possibilitar a formação de síntons moleculares adequados à formação dos cocristais desejados. A análise dos resultados obtidos permitiu verificar que, nas condições experimentais utilizadas, todas as misturas estudadas formaram apenas compostos eutéticos. Entretanto, embora os diagramas de fases e os experimentos de DSC, raios X e FTIR tenham confirmado apenas a obtenção de compostos eutéticos entre o cetoprofeno e os co-formadores estudados, o método do contato de Kofler indicou a formação de um cocristal entre o cetoprofeno e nicotinamida. Assim sendo, o trabalho realizado até agora abre portas para investigações futuras, nomeadamente, com relação aos estudos de termomicroscopia relativos aos demais sistemas estudados neste trabalho.
Title in English
Thermoanalytical study and characterization in the solid state of the chemical interaction between ketoprofen and some organic compounds
Keywords in English
cocrystals
DSC
Ketoprofen
PLTM
Abstract in English
In this work, we performed the thermoanalytical study and characterization at the solid state on the chemical interaction between ketoprofen (CET) and some organic compounds (benzamide (BA), picolinamide (PA), nicotinamide (NA), isonicotinamide (INA), pyrazinamide (PZA), salicylic acid (SA) and benzoic acid (BA)), aimed at obtaining cocrystals. The mechanochemical method was used for the preparation of solid compounds, and they were analyzed by differential scanning calorimetry (DSC), infrared spectroscopy with Fourier transform (FTIR), and X-ray powder difraction (XRPD). The choice of the organic compounds (co-formers) was based on their molecular structures, so that those selected for this work possess a molecular structure able to allow the formation of molecular synthons suitable for cocrystals formation. The analysis of the results has shown that under the experimental conditions used, all systems studied has formed only eutectic compounds. However, although the phase diagrams and DSC experiments, X-ray and FTIR have confirmed obtaining only eutectic compounds between ketoprofen and co-formers studied, the method of contact Kofler has indicated the discovery of a new co-crystal formed between ketoprofen and nicotinamide. Therefore, the work done so far opens the door to future research in particular with regard to thermomicroscopy studies related to other systems studied in this work.
 
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Publishing Date
2016-03-09
 
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