ESEEM electron spin-echo

Double-resonance spectroscopy involves the use of two different sources of radiation. In the context of EPR, these usually are a microwave and a radiowave or (less common) a microwave and another microwave. The two combinations were originally called ENDOR (electron nuclear double resonance) and ELDOR (electron electron double resonance), but the development of many variations on this theme has led to a wide spectrum of derived techniques and associated acronyms, such as ESEEM (electron spin echo envelope modulation), which is a pulsed variant of ENDOR, or DEER (double electron electron spin resonance), which is a pulsed variant of ELDOR. The basic principle involves the saturation (partially or wholly) of an EPR absorption and the subsequent transfer of spin energy to a different absorption by means of the second radiation, leading to the detection of the difference signal. The requirement of saturability implies operation at close to liquid helium, or even lower, temperatures, which, combined with long experimentation times, produces a... [Pg.226]

ESEEM Electron spin-echo envelope modulation... [Pg.205]

EPR, Electron paramagnetic resonance ESEEM, Electron spin-echo envelope modulation EXAFS, Extended X-ray absorption fine structure... [Pg.329]

PSII = Photosystem II WOC = Water-oxidizing complex OEC = Oxygen-evolving complex (B)RC = (Bacterial) Reaction Center Chi = Chlorophyll Bchl = Bacteriochloro-phyll XRD = X-ray diffraction EPR = Electron paramagnetic resonance EXAFS = Extended X-ray absorption fine stmctnre ENDOR = Electron-nuclear double resonance ESEEM = Electron spin echo envelope modulation (Tyr = Yz) = DlTyrl61 ATP = Adenosine Triphosphate KIE = Kinetic isotope effect UV = Ultraviolet (FT-)IR = (Fourier Transform) InfraRed. [Pg.2537]

CEMS = conversion electron Mossbauer spectroscopy DFT = density functional theory EFG = electric field gradient EPR = electron paramagnetic resonance ESEEM = electron spin echo envelope modulation spectroscopy GTO = Gaussian-type orbitals hTH = human tyrosine hydroxylase MIMOS = miniaturized mossbauer spectrometer NFS = nuclear forward scattering NMR = nuclear magnetic resonance RFQ = rapid freeze quench SAM = S -adenosyl-L-methionine SCC = self-consistent charge STOs = slater-type orbitals TMP = tetramesitylporphyrin XAS = X-ray absorption spectroscopy. [Pg.2841]

EPR = Electron paramagnetic resonance EXAFS = Extended X-ray fine stmctnre analysis ESEEM = Electron spin echo envelope spectroscopy XANES = X-ray absorption near edge stmctnre analysis NMR = Nnclear magnetic resonance. [Pg.5011]

DPPH = 2,2-diphenyl-1-picrylhydrazyl ENDOR= electron-nuclear double resonance EPR = electron paramagnetic resonance ESE = electron spin echoes ESEEM = electron spin echo envelope modulation EFT = fast fourier transformations FWHM = fidl width at half maximum HYSCORE = hyperfine sublevel correlation nqi = nuclear quadrupole interaction TauD = taurme/aKG dioxygenase TWTA = traveling wave tube amphfier ZFS = zero field sphtting. [Pg.6511]

ESEEM, Electron Spin Echo Envelope Modulation Spectroscopy... [Pg.110]

ESEEM - electron spin echo envelope modulation ESP-EPR - electron spin polarized EPR Et - ethyl eV - electron volt... [Pg.743]

GTP = 5 -guanosine triphosphate AE = Activating enzyme BAN = Backbone amide nitrogen BioB = Biotin synthase CD = Circular dichroism cyt = Cytochrome DFT = Density functional theory DMSO = Dimethylsulfoxide Dx = Desulforedoxin ENDOR = Electron-nuclear double resonance EPR = Electron paramagnetic resonance ESEEM = Electron-spin echo envelop modulation ETF = Electron transferring flavoprotein EXAFS = Extended x-ray absorption fine structure FAD = Flavin adenine dinucleotide Fd = Ferredoxin FMN = Flavin mononucleotide FNR = Fumarate-nitrate reduction FTIR =... [Pg.2298]

Knowledge of the solid-state chemistry of catalysts is invaluable to an understanding of their catalytic behaviour. Characterisation of this type of mixed oxide presents a major problem and is notoriously difficult. No single technique can yield anything but a very small amoimt of infonnation, and a complete picture can only be gained by using a combination of methods. We report data obtained from a number of techniques including gas adsorption, FT-Raman, EPR and ESEEM (electron spin echo envelope modulation), XRD, and electron microscopy and electron diffraction. [Pg.488]