Study of the thermal behavior in solid state of Mn(II)-Diclofenac Complex
The preparation, characterization and thermal behavior of Mn(II)-diclofenac solid-state complex was investigated by simultaneous TG/DTA and DTG curves, DSC, X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) techniques. The thermal evaluation was carried out with sample masses of...
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| Format: | Article |
| Language: | English |
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Universidade Estadual Paulista
2018-05-01
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| Series: | Eclética Química |
| Online Access: | https://revista.iq.unesp.br/ojs/index.php/ecletica/article/view/42 |
| _version_ | 1818357703507968000 |
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| author | Marcelo Kobelnik Valdecir Ângelo Quarcioni Adélia Emília de Almeida Clóvis Augusto Ribeiro Marisa Spirandeli Crespi |
| author_facet | Marcelo Kobelnik Valdecir Ângelo Quarcioni Adélia Emília de Almeida Clóvis Augusto Ribeiro Marisa Spirandeli Crespi |
| author_sort | Marcelo Kobelnik |
| collection | DOAJ |
| description | The preparation, characterization and thermal behavior of Mn(II)-diclofenac solid-state complex was investigated by simultaneous TG/DTA and DTG curves, DSC, X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) techniques. The thermal evaluation was carried out with sample masses of 2 and 5 mg, with the purpose of comparing the values of activation energy regarding dehydration, monotropic phase transition and thermal decomposition in both samples mass. The DSC curves were obtained in opened and with crimped lids crucibles of aluminum under oxygen purge gas and static air (without purge gas). The DTA and DSC curves show an exothermic peak between 150-180 °C depending on heating rate, which can be attributed to the monotropic non-reversible reaction. The activation energy (Ea/kJ mol-1) to dehydration, the monotropic phase transition and the first thermal decomposition step were determined by Capela-Ribeiro nonlinear isoconversional method. The activation energy under oxygen dynamic purge gas shows lower values compared to those obtained under static air. |
| first_indexed | 2024-12-13T20:17:19Z |
| format | Article |
| id | doaj.art-ed12a8fac80a46b2b290363c0f4882df |
| institution | Directory Open Access Journal |
| issn | 1678-4618 |
| language | English |
| last_indexed | 2024-12-13T20:17:19Z |
| publishDate | 2018-05-01 |
| publisher | Universidade Estadual Paulista |
| record_format | Article |
| series | Eclética Química |
| spelling | doaj.art-ed12a8fac80a46b2b290363c0f4882df2022-12-21T23:32:47ZengUniversidade Estadual PaulistaEclética Química1678-46182018-05-01431596610.26850/1678-4618eqj.v43.1.2018.p59-6642Study of the thermal behavior in solid state of Mn(II)-Diclofenac ComplexMarcelo Kobelnik0Valdecir Ângelo Quarcioni1Adélia Emília de Almeida2Clóvis Augusto Ribeiro3Marisa Spirandeli Crespi4Centro Universitário do Norte Paulista - UNORP, São José do Rio Preto, SPInstituto de Pesquisas Tecnológicas – IPT, São Paulo, SPSchool of Pharmaceutical Science - São Paulo State UniversitySão Paulo State University, Instituto de Química, Araraquara, SPSão Paulo State University, Instituto de Química, Araraquara, SPThe preparation, characterization and thermal behavior of Mn(II)-diclofenac solid-state complex was investigated by simultaneous TG/DTA and DTG curves, DSC, X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) techniques. The thermal evaluation was carried out with sample masses of 2 and 5 mg, with the purpose of comparing the values of activation energy regarding dehydration, monotropic phase transition and thermal decomposition in both samples mass. The DSC curves were obtained in opened and with crimped lids crucibles of aluminum under oxygen purge gas and static air (without purge gas). The DTA and DSC curves show an exothermic peak between 150-180 °C depending on heating rate, which can be attributed to the monotropic non-reversible reaction. The activation energy (Ea/kJ mol-1) to dehydration, the monotropic phase transition and the first thermal decomposition step were determined by Capela-Ribeiro nonlinear isoconversional method. The activation energy under oxygen dynamic purge gas shows lower values compared to those obtained under static air.https://revista.iq.unesp.br/ojs/index.php/ecletica/article/view/42 |
| spellingShingle | Marcelo Kobelnik Valdecir Ângelo Quarcioni Adélia Emília de Almeida Clóvis Augusto Ribeiro Marisa Spirandeli Crespi Study of the thermal behavior in solid state of Mn(II)-Diclofenac Complex Eclética Química |
| title | Study of the thermal behavior in solid state of Mn(II)-Diclofenac Complex |
| title_full | Study of the thermal behavior in solid state of Mn(II)-Diclofenac Complex |
| title_fullStr | Study of the thermal behavior in solid state of Mn(II)-Diclofenac Complex |
| title_full_unstemmed | Study of the thermal behavior in solid state of Mn(II)-Diclofenac Complex |
| title_short | Study of the thermal behavior in solid state of Mn(II)-Diclofenac Complex |
| title_sort | study of the thermal behavior in solid state of mn ii diclofenac complex |
| url | https://revista.iq.unesp.br/ojs/index.php/ecletica/article/view/42 |
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