Copper ESEEM and HYSCORE through ultra-wideband chirp EPR spectroscopy
- ETH Zurich, Laboratory of Physical Chemistry, Vladimir-Prelog-Weg 2, CH-8093 Zurich (Switzerland)
The main limitation of pulse electron paramagnetic resonance (EPR) spectroscopy is its narrow excitation bandwidth. Ultra-wideband (UWB) excitation with frequency-swept chirp pulses over several hundreds of megahertz overcomes this drawback. This allows to excite electron spin echo envelope modulation (ESEEM) from paramagnetic copper centers in crystals, whereas up to now, only ESEEM of ligand nuclei like protons or nitrogens at lower frequencies could be detected. ESEEM spectra are recorded as two-dimensional correlation experiments, since the full digitization of the electron spin echo provides an additional Fourier transform EPR dimension. Thus, UWB hyperfine-sublevel correlation experiments generate a novel three-dimensional EPR-correlated nuclear modulation spectrum.
- OSTI ID:
- 22493453
- Journal Information:
- Journal of Chemical Physics, Vol. 143, Issue 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
ACOUSTIC ESR
COPPER
CORRELATIONS
CRYSTALS
EXCITATION
FOURIER TRANSFORMATION
FREQUENCY DEPENDENCE
HYPERFINE STRUCTURE
LIGANDS
MODULATION
NITROGEN
PARAMAGNETISM
PROTONS
THREE-DIMENSIONAL LATTICES
TWO-DIMENSIONAL SYSTEMS