作者
Daniella Goldfarb, Yaakov Lipkin, Alexey Potapov, Yehoshua Gorodetsky, Boris Epel, Arnold M Raitsimring, Marina Radoul, Ilia Kaminker
发表日期
2008/9/1
期刊
Journal of magnetic resonance
卷号
194
期号
1
页码范围
8-15
出版商
Academic Press
简介
The set-up of a new microwave bridge for a 95GHz pulse EPR spectrometer is described. The virtues of the bridge are its simple and flexible design and its relatively high output power (0.7W) that generates π pulses of 25ns and a microwave field, B1=0.71 mT. Such a high B1 enhances considerably the sensitivity of high field double electron-electron resonance (DEER) measurements for distance determination, as we demonstrate on a nitroxide biradical with an interspin distance of 3.6nm. Moreover, it allowed us to carry out HYSCORE (hyperfine sublevel-correlation) experiments at 95GHz, observing nuclear modulation frequencies of 14N and 17O as high as 40MHz. This opens a new window for the observation of relatively large hyperfine couplings, yet not resolved in the EPR spectrum, that are difficult to observe with HYSCORE carried out at conventional X-band frequencies. The correlations provided by the …
引用总数
2008200920102011201220132014201520162017201820192020202120222023202417917913109513101075644
学术搜索中的文章
D Goldfarb, Y Lipkin, A Potapov, Y Gorodetsky, B Epel… - Journal of magnetic resonance, 2008