ESR studies of redox-active PMNT-PEG-PMNT polymer

Bednarowicz, Magdalena; Dobosz, Bernadeta; Krzyminiewski, Ryszard; Hałupka-Bryl, Magdalena; Deptuła, Tobiasz; Nagasaki, Yukio

doi:10.1016/j.matchemphys.2015.05.045

Cited by 10 publications

(3 citation statements)

References 27 publications

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“…Oxygen defects can be characterized through EPR, which is a highly sensitive and rapid technique. 18) An EPR signal is observed when the quantum of the electromagnetic wave energy hν incident on a sample is equal to the energy difference between neighboring energy levels, which is described by the following resonance condition: 19)…”

Section: Epr Analysis Oxygen Vacancy (V Omentioning

confidence: 99%

Experimental verification of vacancy defects and their vital role on reddish Bi₄Ge₃O₁₂ single crystals

Yuan

Chen

et al. 2022

Jpn. J. Appl. Phys.

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Reddish bismuth germanate (Bi4Ge3O12, BGO) crystals are found during the industrial large-size and -scale crystal growth by Bridgman method, which directly causes visible absorption. The reddish can be eliminated by a modified oxygen-annealing. Oxygen vacancy is further confirmed through electron paramagnetic resonance, X-ray photoelectron spectroscopy, Raman spectroscopy to demonstrate the existence of vacancy defects and elucidate the nature and role. Bi vacancy in reddish BGO single crystals is verified via scanning transmission electron microscopy, energy-dispersive spectroscopy, and high-angle annular dark-field scanning TEM. The essence of annealing and vacancy evolution is also discussed.

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Section: Epr Analysis Oxygen Vacancy (V Omentioning

confidence: 99%

Experimental verification of vacancy defects and their vital role on reddish Bi₄Ge₃O₁₂ single crystals

Yuan

Chen

et al. 2022

Jpn. J. Appl. Phys.

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“…The esfit function allows adjusting the experimental spectrum to the data important for the suitable type of molecule. It also allows specifying simulated parameters, which correspond to the ESR spectrum in the best way [20,41].…”

Section: Simulations In Easyspinmentioning

confidence: 99%

“…Iron oxide nanomaterials are characterized using different methods, including transmission electron microscopy (TEM), X-ray diffraction (XRD), superconducting quantum interference device (SQUID), UV-vis spectroscopy, and dynamic light scattering (DLS) [14,15]. The electron spin resonance (ESR) method has previously been used for the description of the physical properties of liposomes [16,17], polymer nanoparticles [18][19][20], or graphene [21]. Indeed, ESR can be a useful method for the characterization of iron oxide nanomaterials [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

ESR Method in Monitoring of Nanoparticle Endocytosis in Cancer Cells

Krzyminiewski

Dobosz

Krist

et al. 2020

IJMS

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Magnetic nanoparticles are extensively studied for their use in diagnostics and medical therapy. The behavior of nanoparticles after adding them to cell culture is an essential factor (i.e., whether they attach to a cell membrane or penetrate the membrane and enter into the cell). The present studies aimed to demonstrate the application of electron spin resonance (ESR) as a suitable technique for monitoring of nanoparticles entering into cells during the endocytosis process. The model nanoparticles were composed of magnetite iron (II, III) oxide core functionalized with organic unit containing nitroxide radical 4-hydroxy-TEMPO (TEMPOL). The research studies included breast cancer cells, as well as model yeast and human microvascular endothelial cells. The results confirmed that the ESR method is suitable for studying the endocytosis process of nanoparticles in the selected cells. It also allows for direct monitoring of radical cellular processes.

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Recent progress in EPR study of spin labeled polymers and spin probed polymer systems

Uddin

Naveed

et al. 2020

Journal of Polymer Science

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The EPR technique is commonly used for the detection and characterization of paramagnetic centers in chemical science. This method can provides a lot of information, such as identity, structure, dynamics, interaction, orientation, glass transition temperature, adsorption behavior, functionality, phase behavior, nano‐inhomogeneities, and conformation of the free‐radical portion of the polymer chain. Most polymers intrinsically possess diamagnetic properties, so in order to study polymers with EPR, paramagnetic centers need to be incorporated into the polymer systems. Spin labeling and spin probing are main methods of covalently attaching paramagnetic centers to polymer chains or embedding them in polymer matrices through non‐covalent interactions, respectively. Spin labeling and spin probing techniques for polymers and polymer systems (especially with nitroxide radicals) have also been studied, which have a profound impact on polymer science. This review focuses on the continuous wave EPR technique and introduces the recent advances in spin labeled polymers and spin probed polymer systems in EPR research.

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ESR studies of redox-active PMNT-PEG-PMNT polymer

Cited by 10 publications

References 27 publications

Experimental verification of vacancy defects and their vital role on reddish Bi₄Ge₃O₁₂ single crystals

Experimental verification of vacancy defects and their vital role on reddish Bi₄Ge₃O₁₂ single crystals

ESR Method in Monitoring of Nanoparticle Endocytosis in Cancer Cells

Recent progress in EPR study of spin labeled polymers and spin probed polymer systems

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ESR studies of redox-active PMNT-PEG-PMNT polymer

Cited by 10 publications

References 27 publications

Experimental verification of vacancy defects and their vital role on reddish Bi4Ge3O12 single crystals

Experimental verification of vacancy defects and their vital role on reddish Bi4Ge3O12 single crystals

ESR Method in Monitoring of Nanoparticle Endocytosis in Cancer Cells

Recent progress in EPR study of spin labeled polymers and spin probed polymer systems

Contact Info

Product

Resources

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Experimental verification of vacancy defects and their vital role on reddish Bi₄Ge₃O₁₂ single crystals

Experimental verification of vacancy defects and their vital role on reddish Bi₄Ge₃O₁₂ single crystals