Michael Coumans – @Mike_coumans13
Biochemical structures and 2-dimensional materials are not easily studied using Electron Paramagnetic Resonance at high magnetic fields using conventional resonators. Surface resonators, like our Double Split-Ring Resonator for 115 GHz, improve the microwave coupling by up to 80X, providing scientists the capability to study these materials with ~ns temporal resolution!
Amit Israelstam, Eyal Laster, Orit Nir-Arad – @DNP_EPR
EPR and DNP-enhanced 13C NMR measurements on our home-built dual DNP/EPR spectrometer reveal unknown properties of substitutional nitrogen centers in diamond, which are used to interpret their DNP spectra. High field EPR data is shown indispensable for both diamond defect spin system characterization and DNP spectral analysis.
Ilia B. Moroz – @IliaMoroz92
Host-guest interactions in MOFs are key to their performance in various applications. Solid-state NMR can probe these interactions, however, with limited sensitivity. I will demonstrate how endogenous metal-ion DNP can tackle this challenge, keeping MOF pores empty for guests, and discuss the effect of MOFs mobility and molecular O2 on the DNP efficacy.
Shebha Anandhi Jegadeesan – @AnandhiJ61993
We use quantum optimal control algorithm to improve XiX DNP. The optimized DNP sequences with initial pulse lengths of 12 and 20 ns gave enhancements 2.4 and 1.6 times greater than XiX DNP, respectively. The challenges and anomaly between the numerical simulations and experiments will be addressed in the poster.
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.
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.
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