Journal
CHEMICAL REVIEWS
Volume 122, Issue 10, Pages 9571-9642Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemrev.1c00708
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Funding
- Chinese Scholarship Council (CSC) [201506870013]
- Australian Research Council [FL170100019, CE200100012, DE190100015, DP200100348]
- Australian Research Council [DE190100015] Funding Source: Australian Research Council
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Paramagnetic chemical probes have been widely used in EPR and NMR spectroscopy, especially in the study of biological macromolecules. Recent developments include an increase in the variety of paramagnetic probes, the development of lanthanoid probes for protein studies, and the development of isotropic paramagnetic probes for NMR and EPR measurements.
Paramagnetic chemical probes have been used in electron paramagnetic resonance (EPR) and nuclear magnetic resonance (NMR) spectroscopy for more than four decades. Recent years witnessed a great increase in the variety of probes for the study of biological macromolecules (proteins, nucleic acids, and oligosaccharides). This Review aims to provide a comprehensive overview of the existing paramagnetic chemical probes, including chemical synthetic approaches, functional properties, and selected applications. Recent developments have seen, in particular, a rapid expansion of the range of lanthanoid probes with anisotropic magnetic susceptibilities for the generation of structural restraints based on residual dipolar couplings and pseudocontact shifts in solution and solid state NMR spectroscopy, mostly for protein studies. Also many new isotropic paramagnetic probes, suitable for NMR measurements of paramagnetic relaxation enhancements, as well as EPR spectroscopic studies (in particular double resonance techniques) have been developed and employed to investigate biological macromolecules. Notwithstanding the large number of reported probes, only few have found broad application and further development of probes for dedicated applications is foreseen.
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