Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. The theory of nuclear orientation via electron spin locking (NOVEL)
 
research article

The theory of nuclear orientation via electron spin locking (NOVEL)

Henstra, A.
•
Wenckebach, W. Th.
2008
Molecular Physics

Nuclear orientation via electron spin locking (NOVEL) is a technique to orient nuclear spins embedded in a solid. Like other methods of dynamic nuclear polarization (DNP) it employs a small amount of unpaired electron spins and uses a microwave field to transfer the polarization of these unpaired electron spins to the nuclear spins. Traditional DNP uses CW microwave fields, but NOVEL uses pulsed electron spin resonance (ESR) techniques: a 90 degree pulse-90 degree phase shift-locking pulse sequence is applied and during the locking pulse the polarization transfer is assured by satisfying the Hartmann-Hahn condition. The transfer is coherent and similar to coherence transfer between nuclear spins. However, NOVEL requires an extension of the existing theory to many, inequivalent nuclear spins and to arbitrary, i.e. high electron and nuclear spin polarization. In this paper both extensions are presented. The theory is applied to the system naphthalene doped with pentacene, where the proton spins are polarized using the photo-excited triplet states of the pentacene molecules and found to show excellent agreement with the experimentally observed evolution of the polarization transfer during the locking pulse.

  • Details
  • Metrics
Type
research article
DOI
10.1080/00268970801998262
Web of Science ID

WOS:000257148400003

Author(s)
Henstra, A.
Wenckebach, W. Th.
Date Issued

2008

Publisher

Taylor & Francis

Published in
Molecular Physics
Volume

106

Start page

859

End page

871

Subjects

dynamic nuclear polarization

•

photo-excited triplet states

•

electron spin locking

•

coherence transfer

•

photo-excited triplet states

•

Hartmann-Hahn Condition

•

Molecular Structure

•

Cross-Polarization

•

Double-Resonance

•

Rotating-Frame

•

Triplet-State

•

Pentacene

•

Naphthalene

•

Crystal

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SB  
Available on Infoscience
November 30, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/61258
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés