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X-WR-CALNAME:Global NMR Discussion Meetings
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X-WR-CALDESC:Events for Global NMR Discussion Meetings
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DTSTART:20240101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20250325T150000
DTEND;TZID=UTC:20250325T160000
DTSTAMP:20260522T170140
CREATED:20250315T023926Z
LAST-MODIFIED:20250411T194434Z
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SUMMARY:Guinevere Mathies
DESCRIPTION:Pulsed dynamic nuclear polarization \nAll spectroscopic methods evolve from continuous-wave to pulsed. Magic-angle-spinning NMR in combination with dynamic nuclear polarization (MAS DNP) has\, so far\, been an exception. We try to change that by designing DNP pulse sequences. \nFor the time being\, pulsed DNP experiments are only possible at low magnetic fields. The basic reason is that suitable microwave sources are not available above 95 GHz. Nevertheless\, we learned a lot in recent years about designing DNP sequences. As a result\, there now exists a family of DNP sequences\, which appear\, based on their matching condition\, compatible with high-field MAS DNP.[1-4] \nThe theoretical description of a single transfer of polarization in a dipolar-coupled electron-nuclear spin system is under control. To build up DNP of bulk nuclei\, however\, many such transfers are needed. We recently found a numerically stable method to simulate pulsed DNP in the steady state\, which even predicts the optimal repetition rate of a sequence. In my talk I will get you up to speed \n.1. Tan et al. Sci. Adv. 5(1)\, eaav6909 (2019)\n2. Redrouthu and Mathies J. Am. Chem. Soc. 144(4)\, 1513–1516 (2022)\n3. Wili et al. Sci. Adv. 8(28)\, eabq0536 (2022)\n4. Redrouthu\, Kumar\, Mathies J. Chem. Phys. 159\, 014201 (2023) \n8:00 AM California or 11:00 AM Boston or 4:00 PM Paris or 8:30 PM Delhi
URL:https://www.globalnmr.org/upcoming-discussions/guinevere-mathies/
ATTACH;FMTTYPE=image/jpeg:https://www.globalnmr.org/wp-content/uploads/2025/03/csm_guinevere_june2017_border2_e0c4e02c99.jpg
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DTSTART;TZID=UTC:20250311T080000
DTEND;TZID=UTC:20250311T170000
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LAST-MODIFIED:20250411T185818Z
UID:544-1741680000-1741712400@www.globalnmr.org
SUMMARY:Chad Rienstra
DESCRIPTION:Tuesday\, March 11\, 2025 \n\n\n\n\n\n\n\nMagic-Angle Spinning Probes for High and Ultra-High Fields \nIn this talk\, I will describe recent progress in the development of custom-designed probes for magic-angle spinning solid-state NMR at 600\, 750\, 900 and 1100 MHz\, including versions with improved sensitivity for 13C and 1H detection and applications to biological macromolecules including microcrystals\, fibrils\, membrane proteins and RNAs. \n8:00 AM California or 11:00 AM Boston or 4:00 PM Paris or 8:30 PM Delhi
URL:https://www.globalnmr.org/upcoming-discussions/chad-rienstra/
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