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  4. Magic Angle Spinning Solid-State 13C Photochemically Induced Dynamic Nuclear Polarization by a Synthetic Donor-Chromophore-Acceptor System at 9.4 T
 
research article

Magic Angle Spinning Solid-State 13C Photochemically Induced Dynamic Nuclear Polarization by a Synthetic Donor-Chromophore-Acceptor System at 9.4 T

De Biasi, Federico  
•
Hope, Michael Allan  
•
Qiu, Yunfan
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May 15, 2024
The Journal of Physical Chemistry Letters

Solid-state photochemically induced dynamic nuclear polarization (photo-CIDNP) is a nuclear magnetic resonance spectroscopy technique in which nuclear spin hyperpolarization is generated upon optical irradiation of an appropriate donor-acceptor system. Until now, solid-state photo-CIDNP at high magnetic fields has been observed only in photosynthetic reaction centers and flavoproteins. In the present work, we show that the effect is not limited to such biomolecular samples, and solid-state C-13 photo-CIDNP can be observed at 9.4 T under magic angle spinning using a frozen solution of a synthetic molecular system dissolved in an organic solvent. Signal enhancements for the source molecule larger than a factor of 2300 are obtained. In addition, we show that bulk 13C hyperpolarization of the solvent can be generated via spontaneous C-13-C-13 spin diffusion at natural abundance.

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Type
research article
DOI
10.1021/acs.jpclett.4c01121
Web of Science ID

WOS:001225789900001

Author(s)
De Biasi, Federico  
Hope, Michael Allan  
Qiu, Yunfan
Brown, Paige J.
Visegradi, Mate  
Ouari, Olivier
Wasielewski, Michael R.
Emsley, Lyndon  
Date Issued

2024-05-15

Publisher

Amer Chemical Soc

Published in
The Journal of Physical Chemistry Letters
Volume

15

Issue

20

Start page

5488

End page

5494

Subjects

Physical Sciences

•

Technology

•

Photosynthetic Reaction Centers

•

Correlated Radical Pairs

•

Photo-Cidnp

•

Electron-Donor

•

Charge Separation

•

Field-Dependence

•

Nmr-Spectroscopy

•

Triplet-State

•

Hyperpolarization

•

Mechanism

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LRM  
FunderGrant Number

Horizon 2020 Framework Programme

200020_212046

Swiss National Science Foundation

101008500

European Union

DE-SC0021314

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Available on Infoscience
June 5, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/208401
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