摘要
Recent developments in in situ nuclear magnetic resonance(NMR)spectroscopy under extreme conditions have led to the observation of a wide variety of physical phenomena that are not accessible with standard high-pressure experimental probes.However,inherent di-or quadrupolar line broadening in diamond anvil cell(DAC)-based NMR experiments often limits detailed investigation of local atomic structures,especially if different phases or local environments coexist.Here,we describe our progress in the development of high-resolutionNMRexperiments in DACs using one-and two-dimensional homonuclear decoupling experiments at pressures up to the megabar regime.Using this technique,spectral resolutions of the order of 1 ppm and below have been achieved,enabling high-pressure structural analysis.Several examples are presented that demonstrate the wide applicability of this method for extreme conditions research.
基金
We thank the German Research Foundation(Deutsche Forschungsgemeinschaft,DFG,Project Nos.DU954/11-1,DU393/13-1,DU393/9-2,andME5206/3-1)
the Federal Ministry of Education and Research,Germany(BMBF,Grant No.05K19WC1)for financial support.T.M.thanks the Center for High Pressure Science and Technology Advanced Research for financial support.F.T.thanks the Swedish Research Council(VR)(Grant No.2019-05600)
D.L.thanks the Alexander von Humboldt Foundation for financial support.N.D.thanks the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University(Faculty Grant SFO-Mat-LiU No.200900971).
