Exploring the limits of electron-nuclear polarization transfer efficiency in three-spin systems

2010 ◽  
Vol 12 (22) ◽  
pp. 5791 ◽  
Author(s):  
Nikolas Pomplun ◽  
Steffen J. Glaser
Keyword(s):  
Nuclear Polarization ◽  
Polarization Transfer ◽  
Spin Systems ◽  
Transfer Efficiency

Exploring the limits of polarization transfer efficiency in homonuclear three spin systems

2006 ◽  
Vol 181 (1) ◽  
pp. 126-134 ◽  
Author(s):  
Jorge L. Neves ◽  
Björn Heitmann ◽  
Timo O. Reiss ◽  
Heloiza H.R. Schor ◽  
Navin Khaneja ◽  
...  
Keyword(s):  
Polarization Transfer ◽  
Spin Systems ◽  
Transfer Efficiency

Production of nuclear polarization of unstable nuclei via polarization transfer reactions

2012 ◽  
pp. 71-77
Author(s):  
Y. Ishibashi ◽  
D. Nagae ◽  
Y. Abe ◽  
T. Nagatomo ◽  
A. Ozawa ◽  
...  
Keyword(s):  
Nuclear Polarization ◽  
Polarization Transfer ◽  
Transfer Reactions ◽  
Unstable Nuclei

Production of nuclear polarization of unstable nuclei via polarization transfer reactions

2013 ◽  
Vol 220 (1-3) ◽  
pp. 71-77 ◽  
Author(s):  
Y. Ishibashi ◽  
D. Nagae ◽  
Y. Abe ◽  
T. Nagatomo ◽  
A. Ozawa ◽  
...  
Keyword(s):  
Nuclear Polarization ◽  
Polarization Transfer ◽  
Transfer Reactions ◽  
Unstable Nuclei

Analysis of parahydrogen polarized spin system in low magnetic fields

2014 ◽  
Vol 16 (29) ◽  
pp. 15411-15421 ◽  
Author(s):  
P. Türschmann ◽  
J. Colell ◽  
T. Theis ◽  
B. Blümich ◽  
S. Appelt
Keyword(s):  
Magnetic Fields ◽  
Spin System ◽  
Structure Determination ◽  
Polarization Transfer ◽  
Spin Systems

Parahydrogen polarized spin systems allow for structure determination even in low magnetic fields of a few millitesla and enable efficient polarization transfer to rare heteronuclei.

scholarly journals Boosting Dissolution-Dynamic Nuclear Polarization by Multiple-Step Dipolar Order Mediated 1H->13C Cross-Polarization

2021 ◽  
Author(s):  
Stuart J. Elliott ◽  
Olivier Cala ◽  
Quentin Chappuis ◽  
Samuel Cousin ◽  
Morgan Ceillier ◽  
...  
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Pulse Sequence ◽  
Polarization Transfer ◽  
Cross Polarization ◽  
Spin Order ◽  
Sample Dissolution ◽  
Dipolar Order ◽  
Multiple Step ◽  
Dissolution Dynamic Nuclear Polarization

<p>Dissolution-dynamic nuclear polarization can be boosted by employing multiplecontact cross-polarization techniques to transfer polarization from 1H to 13C spins. The method is efficient and significantly reduces polarization build-up times, however, it involves high-power radiofrequency pulses in a superfluid helium environment which limit its implementation and applicability and prevent a significant scaling-up of the sample size.</p> <p>We propose to overcome this limitation by a stepwise transfer of polarization using a lowenergy and low-peak power radiofrequency pulse sequence where the 1H®13C polarization transfer is mediated by a dipolar spin order reservoir. An experimental demonstration is presented for [1-13C]sodium acetate. A solid-state 13C polarization of ~43.5% was achieved using this method with a build-up time constant of ~5.1 minutes, leading to a ~28.5% 13C polarization in the liquidstate after sample dissolution. The low-power multiple-step polarization transfer efficiency with respect to the most advanced and highest-power multiple-contact cross-polarization approach was found to be ~0.69.</p>

scholarly journals Boosting Dissolution-Dynamic Nuclear Polarization by Multiple-Step Dipolar Order Mediated 1H->13C Cross-Polarization

2021 ◽  
Author(s):  
Stuart J. Elliott ◽  
Olivier Cala ◽  
Quentin Chappuis ◽  
Samuel Cousin ◽  
Morgan Ceillier ◽  
...  
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Pulse Sequence ◽  
Polarization Transfer ◽  
Cross Polarization ◽  
Spin Order ◽  
Sample Dissolution ◽  
Dipolar Order ◽  
Multiple Step ◽  
Dissolution Dynamic Nuclear Polarization

<p>Dissolution-dynamic nuclear polarization can be boosted by employing multiplecontact cross-polarization techniques to transfer polarization from 1H to 13C spins. The method is efficient and significantly reduces polarization build-up times, however, it involves high-power radiofrequency pulses in a superfluid helium environment which limit its implementation and applicability and prevent a significant scaling-up of the sample size.</p> <p>We propose to overcome this limitation by a stepwise transfer of polarization using a lowenergy and low-peak power radiofrequency pulse sequence where the 1H®13C polarization transfer is mediated by a dipolar spin order reservoir. An experimental demonstration is presented for [1-13C]sodium acetate. A solid-state 13C polarization of ~43.5% was achieved using this method with a build-up time constant of ~5.1 minutes, leading to a ~28.5% 13C polarization in the liquidstate after sample dissolution. The low-power multiple-step polarization transfer efficiency with respect to the most advanced and highest-power multiple-contact cross-polarization approach was found to be ~0.69.</p>

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