Videos
Understanding DNP : Insights from Average Hamiltonian Theory
During the 90th session of the Global NMR Discussion Meetings held on October 22nd, 2024 via Zoom, Prof. Sheetal Kumar Jain from the Indian Institute of Science, Bengaluru, India, gave a talk on the topic "Understanding Dynamic Nuclear Polarization: Insights from Average Hamiltonian Theory". The recording serves as a tutorial.
Abstract: Average Hamiltonian Theory (AHT) effectively explains the mechanisms, efficiencies, and optimal conditions for solid-state NMR pulse sequences. In Dynamic Nuclear Polarization (DNP), AHT describes how electron-nuclear spin couplings drive polarization transfer under microwave irradiation. By simplifying spin dynamics, AHT offers insights into polarization mechanisms like the solid effect, cross effect, and pulsed DNP, helping predict conditions to maximize nuclear spin polarization and enhance NMR signal sensitivity.
Find out more about Prof. Sheetal Kumar Jain's research: https://sscu.iisc.ac.in/sheetal-kumar-jain/
Advances in the Computation of NMR Interactions in Materials
During the 81st session of the Global NMR Discussion Meetings held on February 27th, 2024 via Zoom, Dr. Sean T. Holmes from the Florida State University, United States, gave a talk on the topic "Advances in the computation of NMR interactions in materials". The recording serves as a tutorial.
Abstract: This lecture will discuss recent advances in the computation of NMR interactions in materials using density functional theory methods. These include methods for accounting for intermolecular interactions, the role of relativistic effects (especially for heavy atoms), and the choice of density functional approximation. Applications to elements from across the Periodic Table will be presented.
Why Is DOSY So Different From COSY?
During the 80th session of the Global NMR Discussion Meetings held on February 13th, 2024 via Zoom, Prof. Gareth Morris from the University of Manchester, United Kingdom, gave a talk on the topic "Why is DOSY so different from COSY?". The recording serves as a tutorial.
Abstract:
Peaks in COSY, NOESY, ROESY and HSQC 2D spectra either appear where they should, or not at all. In DOSY spectra, it is all too common to see peaks at incorrect positions in the diffusion domain. This tutorial will explore why this happens, what we can do about it, and how to avoid being misled by DOSY spectra.
Prof. Gareth Morris' research group website and bio: https://nmr.chemistry.manchester.ac.uk/?q=node%2F13
Inside an NMR Spectrometer
During the 73rd session of the Global NMR Discussion Meetings held on October 24th, 2023 via Zoom, Prof. Kazuyuki Takeda from Kyoto University in Japan, gave a talk on the topic "Inside an NMR Spectrometer". The recording serves as a tutorial.
Abstract: Let us take a brief look at what is happening inside an NMR spectrometer when we operate it, running pulse sequences and acquiring NMR signals. In particular, I will focus on open-resource, home-built NMR spectrometers we routinely use in our lab, and show how we apply them in the conventional and unconventional NMR experiments.
Website: http://kuchem.kyoto-u.ac.jp/bun/indiv/takezo/index_en.html http://www.kuchem.kyoto-u.ac.jp/organization/member/bk_200710/takezo_e.html
Explorations in NMR Relaxation
During the 72nd session of the Global NMR Discussion Meetings held on October 10th, 2023 via Zoom, Prof. Alexej Jerschow gave a talk on the topic "Explorations in NMR Relaxation by Experiments and MD/Ab Initio Computation". The recording serves as a tutorial.
Prof. Alexej Jerschow is a Professor of Chemistry at New York University, USA.
Website: https://wp.nyu.edu/jerschow/
Google scholar: https://scholar.google.com/citations?...
X (previously Twitter): https://twitter.com/ajerschow
NMR Pulse Sequence Basics and Design Principles
During the 71st session of the Global NMR Discussion Meetings held on September 26th, 2023 via Zoom, Prof. Tairan Yuwen gave a talk on the topic "NMR pulse sequence basics and design principles". The recording serves as a tutorial.
Prof. Tairan Yuwen is an Assistant Professor at Peking University, China
Abstract: NMR is commonly used for studying structure and dynamics of molecules, and many NMR experiments have been developed for different purposes. In each NMR experiment it is necessary to choose the most suitable NMR pulse sequence to obtain optimal results, which requires understanding about the basic theory. During NMR pulse sequence the studied system is evolved under different types of interactions, which can be represented by density matrix or product operator. The basic syntax for NMR pulse sequence programming will be briefly introduced together with several examples, which helps to understand how NMR pulse sequences work and make further optimization.
Heteronuclear Spin Decoupling in Static & Rotating Samples
During the 45th session of the Global NMR Discussion Meetings held on March 22nd, 2022 via Zoom, Prof. Matthias Ernst from ETH Zürich gave a talk on the topic "Heteronuclear Spin Decoupling in Static and Rotating Samples". The recording serves as a tutorial.
Abstract: I will discuss the fundamentals of heteronuclear decoupling with an emphasis on the differences between static and rotating samples. The talk will highlight the importance of the interaction-frame transformation in both cases and the new aspects that come up in rotating solids. In the end, I will give qualitative recommendations which sequences to use.
Speaker's biography:
1993: Ph.D, ETH Zürich (with Richard Ernst)
1994-1996: Postdoc, UC Berkeley (with Alex Pines)
1996-1998: Scientist, University of Nijmegen
1998-2011: Senior Scientist and Professor, ETH Zürich
Social Media:
Twitter: @maer
Website: https://www.nmr.ethz.ch/~maer/
Google Scholar: https://scholar.google.com/citations?...
What goes on inside the nucleus?
During the 39th session of the Global NMR Discussion Meetings held on November 23rd, 2021 via Zoom, Prof. Ilya Kuprov gave a talk on "What goes on inside the nucleus: origins of nuclear magnetogyric ratio and quadrupole moment". The recording serves as a tutorial.
Prof. Kuprov is a world renowned magnetic resonance spectroscopy and imaging specialist with a particular focus on large-scale computer simulation of magnetic processes in chemical and biological systems; this includes quantum optimal control and machine learning methods.
2005: DPhil, Chemistry, University of Oxford (with Prof. Peter Hore)
2005-2010: Fellow by Examination, Magdalen College, Oxford
2007-2009: Lecturer in Chemistry, University of Durham
2009-2011: EPSRC Early Career Fellow, University of Oxford
2011-present: Associate Professor of Chemical Physics at the University of Southampton
2018-present: Associate Editor, Science Advances.
Website: https://spindynamics.org
Google Scholar: https://scholar.google.com/citations?...
Brief Principles of Symmetry-Based Recoupling in Solid-State NMR
In session 28 held on 25th May 2021, Prof. Malcolm Levitt gave a talk on the principles of symmetry-based recoupling in solid-state nuclear magnetic resonance (NMR) spectroscopy, via Zoom. The video was recorded live during the presentation and serves as an educative lecture.
Prof. Levitt obtained his PhD from Oxford University in 1981, under the supervision of Prof. Ray Freeman. He performed postdoctoral research with Profs. Shimon Vega in Israel and Richard Ernst at the ETH in Zürich (who received the Nobel Prize in Chemistry in 1991). He was then on the research staff at the Francis Bitter Magnet Laboratory at MIT, Boston, USA, for 4 years. He moved back to England as a Royal Society Research Fellow at the Centre for Superconductivity in Cambridge, before becoming a lecturer at the University of Stockholm, Sweden, where he was made a full professor in 1997. He moved back to England to take up a Professorship in Physical Chemistry at the University of Southampton in April 2001.
Website: https://www.southampton.ac.uk/chemist...
Google scholar: https://scholar.google.co.uk/citation...
Abstract:
- high-resolution solid-state NMR requires removal of anisotropic spin interactions; useful information is conveyed by anisotropic spin interactions; having the cake while eating it.
- rotational symmetries of the spin interactions; space, spin and field signatures
- magic-angle spinning and spatial averaging
- multiple-pulse NMR and spin averaging
- combined spin/spatial/time symmetries
- symmetry-based selection rules and space/spin selection diagrams
- C-sequences
- R-sequences
- some examples
Some references:
https://doi.org/10.1002/9780470034590...
https://doi.org/10.1021/ja052306h
https://doi.org/10.1016/S0009-2614(00)00340-7
https://doi.org/10.1016/0009-2614(95)00741-L
These articles can be downloaded from Dropbox: https://www.dropbox.com/sh/lxlw381wa7...