Thermal study, temperature diffraction patterns and evolved gas analysis during pyrolysis and oxidative decomposition of novel ternary complexes of light lanthanides with mefenamic acid and 1,10-phenanthroline

Kosińska-Pezda, Małgorzata; Zapała, Lidia; Maciołek, Urszula; Byczyński, Łukasz; Woźnicka, Elżbieta; Zapała, Wojciech

doi:10.1016/j.jaap.2021.105293

Cited by 10 publications

(7 citation statements)

References 32 publications

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“…In the FT-IR spectrum of fucoidan at 100 °C ( Figure 6 a), characteristic bands were observed in the ranges of 3550–3200, 1630–1600 and 600–400 cm −1 corresponding to the asymmetric and symmetric OH stretching, HOH bending and the rotational oscillations of the water molecules [ 27 ]. Simultaneously, the ionic current scans in the mass spectra at the temperature of 25–200 °C showed the signals at m / z 17 and 18 ( Figure 6 b) related to the OH + and H 2 O + species [ 28 , 29 ]. Furthermore, no other MS signals and absorption bands from the small molecules were observed in the temperature range of 36–200 °C, indicating that the fucoidan chains are not destroyed.…”

Section: Resultsmentioning

confidence: 99%

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Textural and Thermal Properties of the Novel Fucoidan/Nano-Oxides Hybrid Materials with Cosmetic, Pharmaceutical and Environmental Potential

Matusiak

Maciołek

Kosińska-Pezda

et al. 2022

IJMS

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The main purpose of the research was to obtain and study hybrid materials based on three different nano-oxides commonly used in the cosmetic and pharmaceutical industries: Al2O3, TiO2, and ZnO, with the natural bioactive polysaccharide fucoidan. Since the mentioned oxides are largely utilized by industry, there is no doubt that the presented studies are important from an environmental point of view. On the basis of the textural studies (dynamic light scattering DLS, low temperature nitrogen adsorption, X-ray diffraction analysis XRD, scanning electron microscopy SEM) it was proved that the properties of the hybrid materials differ from the pure components of the system. Moreover, the advanced thermal analysis (TG-DTG-DSC) combined with the evolved gas analysis using Fourier transformed infrared spectroscopy (FTIR) and mass spectrometry were applied to describe the thermal decomposition of fucoidan, oxides and hybrid materials. It was found that the interactions between the polymer and the oxides results in the formation of the hybrid materials due to the functionalization of the nanoparticles surface, and that their thermal stability increased when compared to the pure substrates. Such findings definitely fill the literature void regarding the fucoidan based hybrid materials and help the industrial formulators in the preparation of new products.

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Section: Resultsmentioning

confidence: 99%

“…Simultaneously, in the mass spectra ( Figures S3b, S4b and S5b ), the signals at m / z 17 and 18 attributed to the OH + and H 2 O + species were detected. In addition, the evolution of carbon dioxide adsorbed on the oxide surface was evidenced [ 27 , 28 , 29 ].…”

Section: Resultsmentioning

confidence: 99%

Textural and Thermal Properties of the Novel Fucoidan/Nano-Oxides Hybrid Materials with Cosmetic, Pharmaceutical and Environmental Potential

Matusiak

Maciołek

Kosińska-Pezda

et al. 2022

IJMS

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“…According to the literature, hygroscopic water was released at temperatures of 100-130 °C. Dehydration occurring below 110 °C was associated with weak binding of water molecules [18].…”

Section: Dsc-tg-ega (Ms) Resultsmentioning

confidence: 99%

“…Furthermore, the ion scans performed in the mass spectrometer at temperatures of 37-200 °C showed signals at m/z 17 and 18 (Figs. 4-6) related to the OH + and H 2 O + species [18,27,28]. Therefore, water evolved from the batch, based on the EGA curves.…”

Section: Evolution Of Water Vapormentioning

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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“…Through repeatable and accurate timing, the FI approach can measure the properties of metastable and transitory species. Multiple measurements developed for clinical, pharmacological, dietary, and environmental studies have demonstrated the value of FI methods for regular analysis [10,[16][17][18][19][20][21][22][23][24][25][26]. When the reagents used are expensive, and the model is cheap and available in large quantities, it is preferable to reverse the injection process.…”

Section: Introductionmentioning

confidence: 99%

Determination of Mefenamic Acid in Aqueous Solutions Using Reverse - Continuous Flow Injection Analysis

2022

pnr

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This research aims to use a novel algorithm to determine the concentration of Mefenamic acid. The MA concentration in aqueous solutions was determined using this technology, and the results obtained using more conventional methods were compared to those obtained using more traditional methods. A signal detector and a specialized software spectrometer then receive the data. The maximum wavelength of the product is determined using a spectroscopic scan, a calibration curve is constructed, and measurements are made to estimate the drug's absolute concentrations in aqueous solutions. This treatment is popular because it is simple, rapid, precise, inexpensive, and adaptable.

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Thermal study, temperature diffraction patterns and evolved gas analysis during pyrolysis and oxidative decomposition of novel ternary complexes of light lanthanides with mefenamic acid and 1,10-phenanthroline

Cited by 10 publications

References 32 publications

Textural and Thermal Properties of the Novel Fucoidan/Nano-Oxides Hybrid Materials with Cosmetic, Pharmaceutical and Environmental Potential

Textural and Thermal Properties of the Novel Fucoidan/Nano-Oxides Hybrid Materials with Cosmetic, Pharmaceutical and Environmental Potential

Melting behavior of sulfur-bearing silicate–phosphate glass batches

Determination of Mefenamic Acid in Aqueous Solutions Using Reverse - Continuous Flow Injection Analysis

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