Titlebook: Electron Paramagnetic Resonance Spectroscopy; Fundamentals Patrick Bertrand Textbook 2020 Springer Nature Switzerland AG 2020 Electron Para

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,How Anisotropy of the , and à Matrices Affects Spectrum Shape for Radicals and Transition Ion Compls. The spectrum produced by an ensemble of paramagnetic centers with an anisotropic magnetic moment in an external magnetic field is determined for single crystals, frozen solutions, and powders. The various contributions to the hyperfine . matrix are then introduced, and the main features of the sp

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,The Zero-Field Splitting Term. EPR Spectrum for Paramagnetic Centres of Spin Greater than ½,gnetic centers with . > ½ in an external magnetic field are discussed. The shape and intensity of the spectrum are determined in the high-field limit by using first-order perturbation theory, which allows the half-field line to be defined. In the low-field limit, equivalent operators are used to def

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Effects of Dipolar and Exchange Interactions on the EPR Spectrum. Biradicals and Polynuclear Complerg Hamiltonian is emphasized. First-order perturbation theory is then used to calculate the splitting of the resonance lines of two paramagnetic centers coupled by weak exchange and dipolar interactions. The magnitude of the splitting is compared with that obtained from numerically calculated spectr

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How Instrumental Parameters Affect the Shape and Intensity of the Spectrum. Introduction to Simulat magnetic field is scanned, the modulation frequency and amplitude, microwave power and frequency, and sample temperature. This is followed by a discussion of the progressive saturation and relaxation broadening methods that can be used to determine the spin-lattice relaxation time .. A section is d

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,How Anisotropy of the , and à Matrices Affects Spectrum Shape for Radicals and Transition Ion Complngle crystals, frozen solutions, and powders. The various contributions to the hyperfine . matrix are then introduced, and the main features of the spectrum in the presence of anisotropic hyperfine interactions are calculated. The effect of molecular motion on the shape of the spectrum is considered.

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