Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques: TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS)

Geórgia A.C. Zangaro; Ana C.S. Carvalho; Bruno Ekawa; André L.C.S. do Nascimento; Wilhan D.G. Nunes; Richard P. Fernandes; Gareth M.B. Parkes; Gage P. Ashton; Massao Ionashiro; Flávio J. Caires

doi:10.1016/j.tca.2019.178399

Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques: TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS)

Geórgia A.C. Zangaro, Ana C.S. Carvalho, Bruno Ekawa, André L.C.S. do Nascimento, Wilhan D.G. Nunes, Richard P. Fernandes, Gareth M.B. Parkes, Gage P. Ashton, Massao Ionashiro, Flávio J. Caires

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Lornoxicam metal complexes [M(Lor)₂(OH₂)₂]∙nH₂O, where M represents the bivalent transition metals (Mn(II) to Zn(II)), Lor is Lornoxicam ligand and n = 2.0 or 2.5 were synthesized. The compounds were characterized by elemental analysis (EA), powder X-ray diffraction (PXRD), infrared spectroscopy (FTIR), simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC) under oxidizing and pyrolysis conditions, differential scanning calorimetry (DSC), hot-stage microscopy (HSM) and evolved gas analysis (EGA) by coupled hot-stage microscopy (HSM-MS) and Fourier transform infrared (TG–FTIR). Regardless of the atmosphere, the thermal stability and thermal behavior up to the first two mass loss steps of the anhydrous compound were similar, only differing significantly in the last steps. The main gaseous products released were H₂O (dehydration), SO₂, CO, CO₂, COS, HCN, HNCO, Methyl Isocyanate, and Ethyl Isocyanate. In addition, FTIR data suggest that pyridyl and carboxyl groups are the coordination sites for metal ions and confirm the presence of differing bounded waters.

Original language	English
Article number	178399
Number of pages	10
Journal	Thermochimica Acta
Volume	681
Early online date	3 Sep 2019
DOIs	https://doi.org/10.1016/j.tca.2019.178399
Publication status	Published - 1 Nov 2019

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Lor Comp - Pure editAccepted author manuscript, 2.27 MBLicence: CC BY-NC-ND

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Zangaro, G. A. C., Carvalho, A. C. S., Ekawa, B., do Nascimento, A. L. C. S., Nunes, W. D. G., Fernandes, R. P., Parkes, G. M. B., Ashton, G. P., Ionashiro, M., & Caires, F. J. (2019). Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques: TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS). Thermochimica Acta, 681, [178399]. https://doi.org/10.1016/j.tca.2019.178399

@article{787b4d85b31c4ac3aac7c256277896cb,

title = "Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques: TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS)",

abstract = "Lornoxicam metal complexes [M(Lor)2(OH2)2]∙nH2O, where M represents the bivalent transition metals (Mn(II) to Zn(II)), Lor is Lornoxicam ligand and n = 2.0 or 2.5 were synthesized. The compounds were characterized by elemental analysis (EA), powder X-ray diffraction (PXRD), infrared spectroscopy (FTIR), simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC) under oxidizing and pyrolysis conditions, differential scanning calorimetry (DSC), hot-stage microscopy (HSM) and evolved gas analysis (EGA) by coupled hot-stage microscopy (HSM-MS) and Fourier transform infrared (TG–FTIR). Regardless of the atmosphere, the thermal stability and thermal behavior up to the first two mass loss steps of the anhydrous compound were similar, only differing significantly in the last steps. The main gaseous products released were H2O (dehydration), SO2, CO, CO2, COS, HCN, HNCO, Methyl Isocyanate, and Ethyl Isocyanate. In addition, FTIR data suggest that pyridyl and carboxyl groups are the coordination sites for metal ions and confirm the presence of differing bounded waters.",

keywords = "HSM-MS, Lornoxicam, TG-FTIR, Thermal Analysis, Transition metal complexes",

author = "Zangaro, {Ge{\'o}rgia A.C.} and Carvalho, {Ana C.S.} and Bruno Ekawa and {do Nascimento}, {Andr{\'e} L.C.S.} and Nunes, {Wilhan D.G.} and Fernandes, {Richard P.} and Parkes, {Gareth M.B.} and Ashton, {Gage P.} and Massao Ionashiro and Caires, {Fl{\'a}vio J.}",

year = "2019",

month = nov,

day = "1",

doi = "10.1016/j.tca.2019.178399",

language = "English",

volume = "681",

journal = "Thermochimica Acta",

issn = "0040-6031",

publisher = "Elsevier",

}

Zangaro, GAC, Carvalho, ACS, Ekawa, B, do Nascimento, ALCS, Nunes, WDG, Fernandes, RP, Parkes, GMB , Ashton, GP, Ionashiro, M & Caires, FJ 2019, 'Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques: TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS)', Thermochimica Acta, vol. 681, 178399. https://doi.org/10.1016/j.tca.2019.178399

Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques : TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS). / Zangaro, Geórgia A.C.; Carvalho, Ana C.S.; Ekawa, Bruno et al.

In: Thermochimica Acta, Vol. 681, 178399, 01.11.2019.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques

T2 - TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS)

AU - Zangaro, Geórgia A.C.

AU - Carvalho, Ana C.S.

AU - Ekawa, Bruno

AU - do Nascimento, André L.C.S.

AU - Nunes, Wilhan D.G.

AU - Fernandes, Richard P.

AU - Parkes, Gareth M.B.

AU - Ashton, Gage P.

AU - Ionashiro, Massao

AU - Caires, Flávio J.

PY - 2019/11/1

Y1 - 2019/11/1

N2 - Lornoxicam metal complexes [M(Lor)2(OH2)2]∙nH2O, where M represents the bivalent transition metals (Mn(II) to Zn(II)), Lor is Lornoxicam ligand and n = 2.0 or 2.5 were synthesized. The compounds were characterized by elemental analysis (EA), powder X-ray diffraction (PXRD), infrared spectroscopy (FTIR), simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC) under oxidizing and pyrolysis conditions, differential scanning calorimetry (DSC), hot-stage microscopy (HSM) and evolved gas analysis (EGA) by coupled hot-stage microscopy (HSM-MS) and Fourier transform infrared (TG–FTIR). Regardless of the atmosphere, the thermal stability and thermal behavior up to the first two mass loss steps of the anhydrous compound were similar, only differing significantly in the last steps. The main gaseous products released were H2O (dehydration), SO2, CO, CO2, COS, HCN, HNCO, Methyl Isocyanate, and Ethyl Isocyanate. In addition, FTIR data suggest that pyridyl and carboxyl groups are the coordination sites for metal ions and confirm the presence of differing bounded waters.

AB - Lornoxicam metal complexes [M(Lor)2(OH2)2]∙nH2O, where M represents the bivalent transition metals (Mn(II) to Zn(II)), Lor is Lornoxicam ligand and n = 2.0 or 2.5 were synthesized. The compounds were characterized by elemental analysis (EA), powder X-ray diffraction (PXRD), infrared spectroscopy (FTIR), simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC) under oxidizing and pyrolysis conditions, differential scanning calorimetry (DSC), hot-stage microscopy (HSM) and evolved gas analysis (EGA) by coupled hot-stage microscopy (HSM-MS) and Fourier transform infrared (TG–FTIR). Regardless of the atmosphere, the thermal stability and thermal behavior up to the first two mass loss steps of the anhydrous compound were similar, only differing significantly in the last steps. The main gaseous products released were H2O (dehydration), SO2, CO, CO2, COS, HCN, HNCO, Methyl Isocyanate, and Ethyl Isocyanate. In addition, FTIR data suggest that pyridyl and carboxyl groups are the coordination sites for metal ions and confirm the presence of differing bounded waters.

KW - HSM-MS

KW - Lornoxicam

KW - TG-FTIR

KW - Thermal Analysis

KW - Transition metal complexes

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U2 - 10.1016/j.tca.2019.178399

DO - 10.1016/j.tca.2019.178399

M3 - Article

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VL - 681

JO - Thermochimica Acta

JF - Thermochimica Acta

SN - 0040-6031

M1 - 178399

ER -

Zangaro GAC, Carvalho ACS, Ekawa B, do Nascimento ALCS, Nunes WDG, Fernandes RP et al. Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques: TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS). Thermochimica Acta. 2019 Nov 1;681:178399. Epub 2019 Sep 3. doi: 10.1016/j.tca.2019.178399

Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques: TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS)

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Gareth Parkes

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Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques: TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS)

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