Alexander Barnes – @MagnetXander
I have a dream. I dream of hundreds and thousands of 100 Tesla Pulsed Dynamic Nuclear Polarization NMR spectrometers sitting on bench-tops and equipped with magic angle spinning spheres spinning a million times a second. To make this dream a reality, talented, ambitious, and dedicated scientists at the ETH Zurich are developing new magnets, microwave technology, and MAS instrumentation. Let me tell you about it.
Venkata SubbaRao Redrouthu – @rvsubbarao
The coherent transfer of electron spin polarization to nuclei by means of a microwave pulse sequence is a promising new approach to enhancing the sensitivity of solid-state nuclear magnetic resonance (NMR). The development of pulse sequences for dynamic nuclear polarization (DNP) of bulk nuclei is far from complete, as is the understanding of what makes a good DNP sequence. In this context, we introduce a new sequence, termed Two-Pulse Phase Modulation (TPPM) DNP. We provide a general theoretical description for electron–proton polarization transfer by periodic DNP pulse sequences and find it in excellent agreement with numerical simulations.
Nesreen Elathram – @NesreenElathram
Chromatin is a complex biological polymer that packages DNA and regulates access to the genetic information in eukaryotic cells. Chromatin structural biology is hampered by the size, the heterogeneity and the presence of both dynamic and rigid components in the polymer. Here, we use DNP to enhance the ssNMR sensitivity of chromatin and investigate the effect of cryogenic temperatures on chromatin structure and spectral resolution.
Santiago Bussandri Mattia – @SantiBussandri
High-spin paramagnetic systems do not give rise to DNP effects by themselves, but in theory, this can be achieved by mixing these radicals with spin 1/2 radicals. In this work, we seek to demonstrate DNP using a mixture of spin 1/2 and higher spin radicals at high magnetic field.
Ravi Shankar Palani – @rshankarpalani
The Overhauser Effect DNP observed in insulating solids doped with BDPA radicals is investigated comprehensively for the role of individual 1H nuclear spins in hyperpolarizing the bulk, prompting us to selectively eliminate the 1H spins experiencing dominant DQ cross-relaxation, thereby obtaining improved bulk enhancements.
Asif Equbal – @asifequbal313
Dynamic nuclear polarization (DNP) is a technique for increasing the sensitivity of NMR by transferring the polarization from electron spins to nuclear spins. DNP has great potential, but experimental efficiencies are still far below the theoretical optimum, for reasons that are not well understood. In this poster, I will present some case studies showing how EPR can be used to measure electron spin dynamics and decipher the DNP mechanism.
Thomas Webber – @ThomasW35463255
Overhauser Dynamic Nuclear Polarization (ODNP) is a novel magnetic resonance tool which combines NMR and EPR to study local (within 1 nm) water dynamics near spin-labeled surfaces. I apply ODNP to study water diffusion in aqueous polymer systems, showing that polymer crowding slows molecular water significantly.
Ran Eitan Abutbul – @RanEitanAbutbul
This work demonstrates the endogenous DNP approach in nanoparticles where the polarizing agents are transition metal ions with unpaired electrons incorporated in the inorganic lattice. CdS:Mn nanoparticles were synthesized and characterized using TEM, EPR, and ICP-MS. Significant DNP enhancement for 113Cd nuclei surface and core moieties was observed.
Raj Chaklashiya – @RajChaklashiya
It is the NMR spectroscopist’s dream to perform Magic-Angle Spinning (MAS) NMR at temperatures below 100 K for significant Boltzmann polarization signal gains. Here we demonstrate this using NMR with stable MAS spinning at 24 – 100 K using a novel helium gas recirculation system developed in collaboration with JEOL.
Isha Yadav – @IshaYadav_1809
Battery is efficient and safer energy storage device . We will use advanced NMR instrumentation and pulse sequence (19 F – 7 Li correlation ) to study solid polymer electrolytes to establish ion conductivity – structural relationship , stability- structural relationship and through DNP we can deal with electrode-electrolyte interface.
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