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Pulsed-high field/high-frequency epr spectroscopy.
| Content Provider | CiteSeerX |
|---|---|
| Author | Fuhs, Michael |
| Abstract | Abstract. Pulsed high-field/high-frequency electron paramagnetic resonance (EPR) spectroscopy is used to disentangle many kinds of different effects often obscured in con-tinuous wave (cw) EPR spectra at lower magnetic fields/microwave frequencies. While the high magnetic field increases the resolution of G tensors and of nuclear Larmor fre-quencies, the high frequencies allow for higher time resolution for molecular dynamics as well as for transient paramagnetic intermediates studied with time-resolved EPR. Pulsed EPR methods are used for example for relaxation-time studies, and pulsed Electron Nuclear DOuble Resonance (ENDOR) is used to resolve unresolved hyperfine structure hidden in inhomogeneous linewidths. In the present article we introduce the basic concepts and selected applications to structure and mobility studies on electron transfer systems, reaction centers of photosynthesis as well as biomimetic models. The article concludes with an introduction to stochastic EPR which makes use of another concept for investigating resonance systems in order to increase the excitation band-width of pulsed EPR. The limited excitation bandwidth of pulses at high frequency is one of the main limitations which, so far, made Fourier transform methods hardly feasible. 1 |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Pulsed-high Field High-frequency Epr Spectroscopy High Frequency Inhomogeneous Linewidths Time Resolution Unresolved Hyperfine Structure Basic Concept Time-resolved Epr Present Article Epr Spectrum Mobility Study Pulsed Epr Different Effect High-field High-frequency Electron Paramagnetic Resonance High Magnetic Field Biomimetic Model Stochastic Epr Electron Nuclear Double Resonance Relaxation-time Study Epr Method Nuclear Larmor Fre-quencies Molecular Dynamic Con-tinuous Wave Many Kind Resonance System Magnetic Field Limited Excitation Bandwidth Excitation Band-width Electron Transfer System Transient Paramagnetic Intermediate Main Limitation Reaction Center |
| Content Type | Text |
| Resource Type | Article |