期刊
JOURNAL OF MAGNETIC RESONANCE
卷 272, 期 -, 页码 108-113出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2016.09.016
关键词
RIDME; Q band; Electron spin envelope modulation suppression; EPR; Paramagnetic metal ions; Gadolinium
资金
- Swiss National Science Foundation [SNF 200020_14441, 200020_157034/1]
- Deutsche Forschungsgemeinschaft [SPP1601, GO 555/6-2]
- Swiss National Science Foundation (SNF) [200020_157034] Funding Source: Swiss National Science Foundation (SNF)
The presence of artefacts due to Electron Spin Echo Envelope Modulation (ESEEM) complicates the analysis of dipolar evolution data in Relaxation Induced Dipolar Modulation Enhancement (RIDME) experiments. Here we demonstrate that averaging over the two delay times in the refocused RIDME experiment allows for nearly quantitative removal of the ESEEM artefacts, resulting in potentially much better performance than the so far used methods. The analytical equations are presented and analyzed for the case of electron and nuclear spins S = 1/2, I = 1/2. The presented analysis is also relevant for Double Electron Electron Resonance (DEER) and Chirp-Induced Dipolar Modulation Enhancement (CIDME) techniques. The applicability of the ESEEM averaging approach is demonstrated on a Gd(III)-Gd(III) rigid ruler compound in deuterated frozen solution at Q band (35 GHz). (C) 2016 Elsevier Inc. All rights reserved.
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