Research of the Properties of Gadolinium Stearate by EPR Spectroscopy

Ivanin, S. N.; Buz’ko, V. Yu.; Panyushkin, V. T.

doi:10.1134/s1070328421030027

Cited by 3 publications

(4 citation statements)

References 27 publications

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“…Electron paramagnetic resonance (EPR) is a suitable method for the study of compounds and materials with free electrons, radicals, radical ions, particles in the triplet state, as well as paramagnetic ions of transition and rare earth metals. To summarize, both CNMs and lanthanide derivatives are suitable objects for EPR studies [17][18][19][20]. The CNTs [21,22], nitrogen-doped CNTs [23], boron-doped CNTs [24], CNFs [25][26][27], consolidate of CNTs and CNFs [28][29][30][31], GO [32][33][34], graphene [35], GO aerogels [36,37], GO quantum dots [38], carbon nanofibers [39], glass-like carbon [40], detonation diamonds and NDs [12], graphitepolystyrene composite [41], carbon films [42], natural coals [43], oxidized coals [44], carbon blacks [45], different carbon composites [46] and others [18] were investigated using the EPR.…”

Section: Introductionmentioning

confidence: 99%

“…The most often rare earth elements and their compounds studied by EPR are gadolinium derivatives [20,53,54] because only ions Gd 3+ and Eu 2+ EPR spectra at room temperature can be observed [19]. For some Ln derivatives, for example, for Ln(OH) 3 (Ln = La, Pr, Nd), EPR spectra can provide information about oxygen vacancies and the coordination environment of Ln 3+ [55][56][57].…”

Section: Introductionmentioning

confidence: 99%

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Composition and Electronic Structure of La2O3/CNFs@C Core-Shell Nanoparticles with Variable Oxygen Content

Suslova,

Ulyanov,

Kozlov

et al. 2023

Nanomaterials

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La2O3 nanoparticles stabilized on carbon nanoflake (CNF) matrix were synthesized and graphitized to produce core-shell structures La2O3/CNFs@C. Further oxidation of these structures by nitric acid vapors for 1, 3 or 6 h was performed, and surface-oxidized particles La2O3/CNFs@C_x (x = 1, 3, 6) were produced. Bulk and surface compositions of La2O3/CNFs@C and La2O3/CNFs@C_x were investigated by thermogravimetric analysis and X-ray photoelectron spectroscopy. With increasing the duration of oxidation, the oxygen and La2O3 content in the La2O3/CNFs@C_x samples increased. The electronic structures of samples were assessed by electron paramagnetic resonance. Two paramagnetic centers were associated with unpaired localized and mobile electrons and were registered in all samples. The correlation between bulk and surface compositions of the samples and their electronic structures was investigated for the first time. The impact of the ratio between sp2- and sp3-hybridized C atoms, the number and nature of oxygen-containing groups on the surface and the presence and proportion of coordinated La atoms on the EPR spectra was demonstrated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Composition and Electronic Structure of La2O3/CNFs@C Core-Shell Nanoparticles with Variable Oxygen Content

Suslova,

Ulyanov,

Kozlov

et al. 2023

Nanomaterials

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“…Although lanthanide salts of fatty acids have a wide range of applications, it is striking that there are so few fundamental works on the study of their physicochemical properties. 21 The superiority of lanthanide fatty acid salts over inorganic lanthanide salts lies in their solubility in molten polymers. Thus, it is possible to obtain transparent polymer fibers, films, and plates with trivalent lanthanide ions introduced into the composition.…”

Section: Introductionmentioning

confidence: 99%

“…However, these measurements were most likely limited to a narrow range of application conditions. Although lanthanide salts of fatty acids have a wide range of applications, it is striking that there are so few fundamental works on the study of their physicochemical properties . The superiority of lanthanide fatty acid salts over inorganic lanthanide salts lies in their solubility in molten polymers.…”

Section: Introductionmentioning

confidence: 99%

Thin Films of Lanthanide Stearates as Modifiers of the Q-Sense Device Sensor for Studying Insulin Adsorption

et al. 2022

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This article presents new possibilities of using thin films of lanthanide stearates as sorbent materials. Modification of the Q-sense device resonator with monolayers of lanthanide stearates by the Langmuir–Schaeffer method made it possible to study the process of insulin protein adsorption on the surface of new thin-film sorbents. The resulting films were also characterized by compression isotherms, chemical analysis, scanning electron microscopy, and mass spectrometry. The transition of stearic acid to salt was recorded by IR spectroscopy. Using the LDI MS method, the main component of thin films, lanthanide distearate, was established. The presence of Eu 2+ in thin films was revealed. In the case of europium stearate, the maximum value of insulin adsorption was obtained, −1.67·10 −10 mole/cm 2 . The findings suggest the possibility of using thin films of lanthanide stearates as a sorption material for the proteomics determination of the quantitative protein content in complex fluid systems by specific adsorption on modified surfaces and isolation of such proteins from complex mixtures.

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Mechanisms of formation and shape control of pentagonal Pd-nanostars and their unique properties in electrocatalytic methanol oxidation and membrane separation of high-purity hydrogen

Petriev,

Pushankina,

Andreev

et al. 2024

International Journal of Hydrogen Energy

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Research of the Properties of Gadolinium Stearate by EPR Spectroscopy

Cited by 3 publications

References 27 publications

Composition and Electronic Structure of La2O3/CNFs@C Core-Shell Nanoparticles with Variable Oxygen Content

Composition and Electronic Structure of La2O3/CNFs@C Core-Shell Nanoparticles with Variable Oxygen Content

Thin Films of Lanthanide Stearates as Modifiers of the Q-Sense Device Sensor for Studying Insulin Adsorption

Mechanisms of formation and shape control of pentagonal Pd-nanostars and their unique properties in electrocatalytic methanol oxidation and membrane separation of high-purity hydrogen

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