TG-MS, TG, DTG and DTA methods in study of thermal decomposition of some d-metal complexes with 4,4'-bpy and propionates

Czakis-Sulikowska, D.; Radwanska-Doczekalska, J.; Czylkowska, Agnieszka; Gołuchowska, J.

doi:10.1023/b:jtan.0000046114.02441.c3

Cited by 23 publications

(6 citation statements)

References 13 publications

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“…= 7.89%) corresponds to the release of 2 moles of H 2 O. The TG-FTIR-MS analysis confirms the first stage of thermal decomposition of 1 to be dehydration, because of the signals with m/z 17 and 18 [47,48] in mass spectra (Figure 5a) as well as present bands corresponding to stretching and deformation vibrations of the OH groups of water molecules in the range 4000-3400 cm −1 and 1800-1200 cm −1 in FTIR spectra (Figure 4a) [49]. The temperature of dehydration above 120 • C indicates that water molecules are strongly bound in crystals [50].…”

Section: Thermal Analysis In Helium Atmospherementioning

confidence: 57%

Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties

et al. 2021

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The coordination ability of QSA− ligand towards potassium cations was investigated. Potassium complex of quercetin-5’-sulfonate of the general formula [KQSA(H2O)2]n was obtained. The [KQSA(H2O)2] (1) was a starting compound for solvothermal syntheses of acetone (2) and dimethylsulfoxide (3) complexes. For the crystalline complexes 1–3, crystals morphology was analyzed, IR and Raman spectra were registered, as well as thermal analysis for 1 was performed. Moreover, for 1 and 3, molecular structures were established. The potassium cations are coordinated by eight oxygen atoms (KO8) of a different chemical nature; coordinating groups are sulfonic, hydroxyl, and carbonyl of the QSA− anion, and neutral molecules—water (1) or DMSO (3). The detailed thermal studies of 1 confirmed that water molecules were strongly bonded in the complex structure. Moreover, it was stated that decomposition processes depended on the atmosphere used above 260 °C. The TG–FTIR–MS technique allowed the identification of gaseous products evolving during oxidative decomposition and pyrolysis of the analyzed compound: water vapor, carbon dioxide, sulfur dioxide, carbonyl sulfide, and carbon monoxide. The solubility studies showed that 1 is less soluble in ethanol than quercetin dihydrate in ethanol, acetone, and DMSO. The exception was aqueous solution, in which the complex exhibited significantly enhanced solubility compared to quercetin. Moreover, the great solubility of 1 in DMSO explained the ease of ligand exchange (water for DMSO) in [KQSA(H2O)2].

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Section: Thermal Analysis In Helium Atmospherementioning

confidence: 57%

Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties

et al. 2021

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“…The other steps between 190 and 325 °C are based on the decomposition of the carboxylate ligands. 23 TGA of the copolymer with 20% of 1 exhibits three weight-loss steps at 223, 257, and 348 °C and exhibits a higher thermal stability as compared to 1. The higher decomposition temperature of the copolymer with 20% of 1 compared to complex 1 is most likely due to the incorporation of 1 in the polymer matrix through the formation of covalent bonds.…”

Section: Resultsmentioning

confidence: 99%

“…TGA of the pristine complex 1 (Figure ) shows a first mass reduction at a temperature of 70 °C, which is most likely due to the release of the methanol ligands. The other steps between 190 and 325 °C are based on the decomposition of the carboxylate ligands . TGA of the copolymer with 20% of 1 exhibits three weight-loss steps at 223, 257, and 348 °C and exhibits a higher thermal stability as compared to 1 .…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Monomeric and Dimeric Copper(II) Carboxylates Bearing Polymerizable Groups and Their Performance in the Copolymerization with MMA

Hamza

Kickelbick

2009

Macromolecules

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The formation and characterization of the two binuclear copper(II) carboxylates Cu2(L)4·2CH3OH (1) and Cu(L)2·H2O·2pyridine (2) (L: methacrylate) are described which contain polymerizable groups. The dimeric Cu2(L)4·2CH3OH was prepared through reaction of methacrylic acid (LH) with basic copper carbonate in methanol solution. When 1 was dissolved in acetone and pyridine was added in excess to the solution, the binuclear complex turned into the mononuclear complex 2. 1 and 2 were characterized by UV−vis, IR, and elemental analysis, and the molecular structures were established by single-crystal X-ray diffraction studies. Both complexes were used in copolymerization with methyl methacrylate (MMA). Polymers containing the copper(II) carboxylates were prepared through radical copolymerization of 1 and 2 with MMA using azobis(isobutyronitrile) (AIBN) and benzoyl peroxide (BPO) as initiator. The obtained hybrid polymers were analyzed applying FT-IR, TGA, and size exclusion chromatography. All methods revealed an incorporation of both comonomers in the polymer backbone. Differences in the polymerization kinetics of the compounds can be explained by interactions of the primary initiating radicals with the copper complexes.

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“…This testified to the presence of carbon monoxide in the gaseous products from the glass batch. MS peaks were also registered for ion fragments with m/z = 12 (C + ) [8,25,31]. The very weak spectrum recorded for m/z = 16 was assigned to the presence of atomic oxygen (O + ), which is also a fragment from the released gases CO and CO 2 [8,31].…”

Section: Evolution Of Comentioning

confidence: 99%

Melting behavior of sulfur-bearing silicate–phosphate glass batches

Sułowska

Szumera

Madej

et al. 2022

J Therm Anal Calorim

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The main purpose of the research was to explain the differences between nominal and actual chemical compositions of silicate-phosphate glasses in the SiO2-P2O5-K2O-MgO-SO3 system. The actual compositions of the materials were determined with X-ray fluorescence (XRF) analyses. Changes in the chemical composition were explained by examining the melting processes for selected glass batches with differential scanning calorimetry-thermogravimetry-related gas analysis by mass spectrometry (DSC-TG-EGA (MS)) and high-temperature X-ray diffraction (HT-XRD). It was found that changes in the chemical composition of the sulfur-bearing glasses were associated with the release of gaseous products. The main gases released during thermal decomposition of the selected glass batch were water vapor, carbon dioxide, carbon monoxide, and ammonia. Since these glasses have potential for use as glassy fertilizers, there is no doubt that the present study is important from an environmental point of view.

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TG-MS, TG, DTG and DTA methods in study of thermal decomposition of some d-metal complexes with 4,4'-bpy and propionates

Cited by 23 publications

References 13 publications

Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties

Potassium Complexes of Quercetin-5′-Sulfonic Acid and Neutral O-Donor Ligands: Synthesis, Crystal Structure, Thermal Analysis, Spectroscopic Characterization and Physicochemical Properties

Synthesis of Monomeric and Dimeric Copper(II) Carboxylates Bearing Polymerizable Groups and Their Performance in the Copolymerization with MMA

Melting behavior of sulfur-bearing silicate–phosphate glass batches

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