Thermal study, identification of intermediate solid products and evolved gas analysis (EGA) during pyrolysis and oxidative decomposition of sodium complex of quercetin-5′-sulfonic acid (Na-5′-QSA)

Maciołek, Urszula; Mendyk, Ewaryst; Kosińska, Małgorzata; Sternik, Dariusz; Drewniak, Marek; Kozioł, Anna E.

doi:10.1016/j.jaap.2020.104881

Cited by 9 publications

(14 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the gaseous products released above 700 °C, only carbon oxides are present (Figures 4a and 5). Contrary to the results obtained for sodium quercetin-5′-sulfonate [41], the pyrolysis of the mixture of potassium carbide and carbon black is not completed up to 1420 °C. Further heating to 300−700 • C causes extended degradation of an organic moiety of the anhydrous 1 with a distinguishable endothermic peak on the DSC at 350 • C and the formation of an inorganic amorphous intermediate (Figure 3a).…”

Section: Thermal Analysis In Helium Atmospherecontrasting

confidence: 93%

“…Despite the failure of the experimental verification of the solid product obtained at 700 °C, the calculations (Table 4) and similarity of the results to those obtained previously for sodium complex [41] allow to assume that a mixture of potassium carbide and carbon black are intermediate products at 700 °C. The TG-DTG-DSC run (Figure 3a) shows that above 700 °C, the mass is still decreasing above 700 °C.…”

Section: Thermal Analysis In Helium Atmospherementioning

confidence: 62%

“…The quercetin-5 -sulfonic acid (HQSA) and its complex with potassium (KQSA) were synthesized as described previously [36,41]. Single crystals of [KQSA(H 2 O) 2 ] (1) were obtained via recrystallization of the yellow microcrystalline powder from water-ethanol (1:1 v/v) solution.…”

Section: Synthesis Of Kqsa Complexesmentioning

confidence: 99%

See 2 more Smart Citations

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

Self Cite

View full text Add to dashboard Cite

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].

show abstract

Section: Thermal Analysis In Helium Atmospherecontrasting

confidence: 93%

Section: Thermal Analysis In Helium Atmospherementioning

confidence: 62%

See 1 more Smart Citation

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…The thermal study, identification of intermediate solid products, evolved gas analysis during pyrolysis and oxidative decomposition of sodium complex of quercetin-5′-sulfonic acid were described by Maciolek and coworkers [ 33 ].…”

Section: Applications To Complexes and Compoundsmentioning

confidence: 99%

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

et al. 2022

View full text Add to dashboard Cite

Advances in on-line thermally induced evolved gas analysis (OLTI-EGA) have been systematically reported by our group to update their applications in several different fields and to provide useful starting references. The importance of an accurate interpretation of the thermally-induced reaction mechanism which involves the formation of gaseous species is necessary to obtain the characterization of the evolved products. In this review, applications of Evolved Gas Analysis (EGA) performed by on-line coupling heating devices to mass spectrometry (EGA-MS), are reported. Reported references clearly demonstrate that the characterization of the nature of volatile products released by a substance subjected to a controlled temperature program allows us to prove a supposed reaction or composition, either under isothermal or under heating conditions. Selected 2019, 2020, and 2021 references are collected and briefly described in this review.

show abstract

“…Thermal analysis technology is an important means to study the thermal stability of compounds. [12][13][14] The research team used the Achar and Coats-Redfern methods to study the thermal stability of lycorine and quinine, which supported the evaluation of the thermal stability of lycoramine. [15][16] After that, this study used thermogravimetry-differential thermal analysis (TG-DTG) technology to discuss the thermal decomposition behavior of lycoramine, and Achar and Coats-Redfern 17 methods were applied to deduce the most likely thermal decomposition mechanism, and then considered the relevant kinetic parameters to infer the storage period of lycoramine.…”

mentioning

confidence: 99%

Thermogravimetric infrared analysis for the pyrolysis mechanism and shelf life of lycoramine hydrobromide

Ling

Qin

Tian

et al. 2021

Int J of Chemical Kinetics

View full text Add to dashboard Cite

Thermal decomposition curves of lycoramine hydrobromide were obtained in the nitrogen by thermogravimetry coupled with infrared spectroscopy (TG-FTIR). Four thermal analysis kinetic methods, for example, Achar, Coats-Redfern, Kissingers, and Ozawa methods were used to speculate the probable mechanisms of the thermal decomposing reaction and the kinetic parameters (apparent activation energy E a and preexponential factor A). The shelf life of lycoramine hydrobromide at room temperature was calculated by the kinetics parameters. According to the theoretical calculations of thermogravimetrydifferential thermal analysis (TG-DTG), infrared spectra, and bond levels, the decomposition of lycoramine was divided into three stages. The first stage started from 227.3 to 312.3 • C, chemical bonds between oxygen atoms and carbon atoms cracked and released alcohol material. The most acceptable mechanism is a chemical reaction control mechanism, which conforms to the reaction series equation, with f(α) = 2(1 − α) 3/2 . In the second stage, starting from 312.3 to 392.3°C, gases such as CO, CO 2 , amines, and NH 3 produced by lycoramine hydrobromide decomposition were released. The most expected mechanism is a chemical reaction, F3, deceleration type α-t curve, which meets the three-stage function, f(α) = 1/2(1 − α) 3 . In the third stage, the residual molecular skeleton (toluene) was thermally cracked deeply from 392.3 • C to the end and the gases such as CO 2, H 2 O, and NH 3 were released. According to the kinetic parameters of thermolysis at the first stage, the shelf life of lycoramine hydrobromide was inferred, which was 4-5 years at room temperature (25 • C).

show abstract

Thermal study, identification of intermediate solid products and evolved gas analysis (EGA) during pyrolysis and oxidative decomposition of sodium complex of quercetin-5′-sulfonic acid (Na-5′-QSA)

Cited by 9 publications

References 25 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

On-Line Thermally Induced Evolved Gas Analysis: An Update—Part 1: EGA-MS

Thermogravimetric infrared analysis for the pyrolysis mechanism and shelf life of lycoramine hydrobromide

Contact Info

Product

Resources

About