Electron paramagnetic resonance anisotropy

CD Siems. The Quantitative Evaluation of the Electron Paramagnetic Resonance Anisotropy of beta... 

Sx, Sy, and Sz are the three components of the spin operator, D and E are the anisotropy constants which were determined via high-frequency electron paramagnetic resonance (D/kB 0.275 K and E/kB 0.046 K [10]), and the last term of the Hamiltonian describes the Zeeman energy associated with an applied field H. 

In the case of copper(II) ions, the magnetic anisotropy is small, as is easily inferred from the g values obtained from electron paramagnetic resonance (EPR) spectra (Peisach and Blumberg, 1974) that reflect the magnetic anisotropy of the electronic ground level only. As the first excited level is normally not populated at room temperature, its contribution is negligible, and the anisotropy of the squared g values can be taken as a good estimate of the x anisotropy (Bertini and Luchinat, 1996). 

TA-transient absorption TRANIP = time-resolved anisotropy TRPL = time-resolved photoluminescence TRIR = time-resolved IR TR = EPR-time-resolved electron paramagnetic resonance spectroscopy. 

AcAc, acetylacetonate EPR, electron paramagnetic resonance DPM, dipivaloylmethane Tc, Correlation time for molecular tumbling A/x, concentration of spins X (per unit volume) D, mutual translational self-diffusion coefficient of the molecules containing A and X a, distance of closest approach of A and X ye, magnetogyric ratio for the electron C, spin-rotation interaction constant (assumed to be isotropic) Ashielding anisotropy <7 <7j ) coo, Debye frequency 0d, the corresponding Debye temperature Fa, spin-phonon coupling constant. 

Sierra G, Schweiger A. 1998. Anisotropy-resolved electron paramagnetic resonance... 

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