Chatterjee Satyaki, Scott Faith J, Sigurdsson Snorri Th, Venkatesh Amrit, Mentink-Vigier Frédéric
Department of Chemistry, Science Institute, University of Iceland, Dunhaga 3, 107 Reykjavik, Iceland.
National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Dr, Tallahassee, Florida 32310, United States.
J Phys Chem Lett. 2025 Jan 16;16(2):635-641. doi: 10.1021/acs.jpclett.4c03254. Epub 2025 Jan 9.
The contribution of protons in or near biradical polarizing agents in Dynamic Nuclear Polarization (DNP) has recently been under scrutiny. Results from selective deuteration and simulations have previously suggested that the role of protons in the biradical molecule depends on the strength of the electron-electron coupling. Here we use the cross effect DNP mechanism to identify and acquire H solid-state NMR spectra of the protons that contribute to propagation of the hyperpolarization, via an experimental approach dubbed Nuclear-Nuclear Double Resonance (NUDOR).
动态核极化（DNP）中双自由基极化剂内部或附近质子的贡献最近受到了审查。选择性氘代和模拟的结果此前表明，双自由基分子中质子的作用取决于电子-电子耦合的强度。在这里，我们使用交叉效应DNP机制，通过一种称为核-核双共振（NUDOR）的实验方法，来识别并获取对超极化传播有贡献的质子的固体核磁共振谱。
