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In situ high-pressure nuclear magnetic resonance crystallography in one and two dimensions

Matter and Radiation at Extremes 2021年第6期6卷 94-103页

作者： Thomas Meier Alena Aslandukova florian trybel Dominique Laniel Takayuki Ishii Saiana Khandarkhaeva Natalia Dubrovinskaia Leonid Dubrovinsky Center for High Pressure Science and Technology Advanced Research BeijingChina Bayerisches Geoinstitut University of BayreuthBayreuthGermany Department of Physics Chemistry and Biology(IFM)Linkoping UniversitySE-58183 LinkopingSweden Material Physics and Technology at Extreme Conditions Laboratory of CrystallographyUniversity of BayreuthBayreuthGermany

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 ***,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 ***,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 *** this technique,spectral resolutions of the order of 1 ppm and below have been achieved,enabling high-pressure structural *** examples are presented that demonstrate the wide applicability of this method for extreme conditions research.

关键词： NMR extreme dimensions

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Direct hydrogen quantification in high-pressure metal hydrides

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Matter and Radiation at Extremes 2023年第1期8卷 63-69页

作者： Thomas Meier Dominique Laniel florian trybel Center for High Pressure Science and Technology Advance Research BeijingChina Center for Science at Extreme Conditions University of EdinburghEdinburghUnited Kingdom Department of Physics Chemistry and Biology(IFM)Linkoping UniversityLinkopingSweden

compounds showing phonon mediated near room-temperature ***,severe limitations in determining the chemical formula of the reaction products,especially with regards to their hydrogen content,impedes a deep understanding of the synthesized phases and can lead to significantly erroneous ***,we present a way to directly access the hydrogen content of MH solids synthesized at high pressures in(laser-heated)diamond anvil cells using nuclear magnetic resonance *** show that this method can be used to investigate MH compounds with a wide range of hydrogen content,from MH_(x) with x=0.15(CuH_(0.15))to x■6.4(H_(6±0.4)S_(5)).

关键词： spectroscopy hydrogen content

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