Temperature dependence of cross-effect dynamic nuclear polarization in rotating solids: advantages of elevated temperatures

2016 ◽  
Vol 18 (44) ◽  
pp. 30696-30704 ◽  
Author(s):  
Michel-Andreas Geiger ◽  
Marcella Orwick-Rydmark ◽  
Katharina Märker ◽  
W. Trent Franks ◽  
Dmitry Akhmetzyanov ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Elevated Temperatures ◽  
Cross Effect

DNP on proteins at 200 K.

Static 1H dynamic nuclear polarization with the biradical TOTAPOL: a transition between the solid effect and the cross effect

2014 ◽  
Vol 16 (14) ◽  
pp. 6687-6699 ◽  
Author(s):  
Daphna Shimon ◽  
Akiva Feintuch ◽  
Daniella Goldfarb ◽  
Shimon Vega
Keyword(s):  
High Temperatures ◽  
Dynamic Nuclear Polarization ◽  
Low Temperatures ◽  
Nuclear Polarization ◽  
Cross Effect ◽  
Solid Effect ◽  
The Cross

Static 1H-DNP with TOTAPOL: the solid effect (SE) dominant at low temperatures; the cross effect (CE) dominant at high temperatures; and DNP-buildup: Tbu(SE) < Tbu(CE).

scholarly journals Maximizing NMR signal per unit time by facilitating the e–e–n cross effect DNP rate

2018 ◽  
Vol 20 (43) ◽  
pp. 27646-27657 ◽  
Author(s):  
Alisa Leavesley ◽  
Sheetal Jain ◽  
Ilia Kamniker ◽  
Hui Zhang ◽  
Suchada Rajca ◽  
...  
Keyword(s):  
Spin Relaxation ◽  
Electron Spin ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Spin ◽  
Nuclear Polarization ◽  
Nuclear Spin Relaxation ◽  
Cross Effect ◽  
Spin Clusters

Dynamic nuclear polarization (DNP) efficiency is critically dependent on the properties of the radical, solvent, and solute, where electron spin clusters will shorten nuclear spin relaxation and enhance CE-DNP.

Bis-Gadolinium Complexes for Solid Effect and Cross Effect Dynamic Nuclear Polarization

2017 ◽  
Vol 129 (15) ◽  
pp. 4359-4363
Author(s):  
Monu Kaushik ◽  
Mian Qi ◽  
Adelheid Godt ◽  
Björn Corzilius
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Cross Effect ◽  
Gadolinium Complexes ◽  
Solid Effect

scholarly journals Optimizing nitroxide biradicals for cross-effect MAS-DNP: the role of g-tensors’ distance

2020 ◽  
Vol 22 (6) ◽  
pp. 3643-3652 ◽  
Author(s):  
Frédéric Mentink-Vigier
Keyword(s):  
Solid State ◽  
Dynamic Nuclear Polarization ◽  
Solid State Nmr ◽  
Nuclear Polarization ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Effect ◽  
Angle Spinning

Nitroxide biradicals are common polarizing agents used to enhance the sensitivity of solid-state NMR experiments via Magic Angle Spinning Dynamic Nuclear Polarization (MAS-DNP).

scholarly journals De novo prediction of cross-effect efficiency for magic angle spinning dynamic nuclear polarization

2019 ◽  
Vol 21 (4) ◽  
pp. 2166-2176 ◽  
Author(s):  
Frédéric Mentink-Vigier ◽  
Anne-Laure Barra ◽  
Johan van Tol ◽  
Sabine Hediger ◽  
Daniel Lee ◽  
...  
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
De Novo ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Effect ◽  
Angle Spinning

From the polarizing agent geometry and EPR properties to the prediction of magic angle spinning dynamic nuclear polarization efficiency.

scholarly journals Electron spin density matching for cross-effect dynamic nuclear polarization

2019 ◽  
Vol 55 (53) ◽  
pp. 7591-7594 ◽  
Author(s):  
Yuanxin Li ◽  
Asif Equbal ◽  
Kan Tagami ◽  
Songi Han
Keyword(s):  
Spin Density ◽  
Electron Spin ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Design Principle ◽  
Cross Effect ◽  
Electron Spin Density

A new design principle for a mixed broad (TEMPO) and narrow (Trityl) line radical to boost the dynamic nuclear polarization efficiency is electron spin density matching, suggesting a polarizing agent of one Trityl tethered to at least two TEMPO moieties.

Nuclear depolarization and absolute sensitivity in magic-angle spinning cross effect dynamic nuclear polarization

2015 ◽  
Vol 17 (34) ◽  
pp. 21824-21836 ◽  
Author(s):  
Frédéric Mentink-Vigier ◽  
Subhradip Paul ◽  
Daniel Lee ◽  
Akiva Feintuch ◽  
Sabine Hediger ◽  
...  
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Effect ◽  
Experimental Conditions ◽  
Absolute Sensitivity ◽  
Field Dependent ◽  
Angle Spinning

Biradicals' performance in MAS-DNP experiments should be revised to account for substantial field-dependent nuclear polarization losses that depend on experimental conditions and biradical properties.

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