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Dynamic Nuclear Polarization Efficiency Increased by Very Fast Magic Angle Spinning

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  • معلومة اضافية
    • Contributors:
      Solid-State NMR Methods for Materials - Méthodes de RMN à l'état solide pour les matériaux; Institut des Sciences Analytiques (ISA); Université Claude Bernard Lyon 1 (UCBL); Université de Lyon-Université de Lyon-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL); Université de Lyon-Université de Lyon-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS); Institut des sciences et ingénierie chimiques (ISIC); Ecole Polytechnique Fédérale de Lausanne (EPFL); Institut de Chimie Radicalaire (ICR); Aix Marseille Université (AMU)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS); Bruker BioSpin GmbH; affiliation inconnue; Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich); Center for Magnetic Resonance; Università degli Studi di Firenze = University of Florence = Université de Florence (UniFI); ANR-10-EQPX-0047,SENS,RMN de Surface Exalté par Polarisation Dynamique Nucléaire(2010); ANR-15-CE29-0022,VHF-DNP-NMR,PDN/RMN du solide à trés haut champ(2015); European Project: 320860,NHMRC::Programs(2005)
    • بيانات النشر:
      HAL CCSD
      American Chemical Society
    • الموضوع:
      2017
    • Collection:
      Aix-Marseille Université: HAL
    • نبذة مختصرة :
      International audience ; Dynamic Nuclear Polarization has recently emerged as a tool to enhance the sensitivity of solid-state NMR experiments. However, so far high enhancements (>100) are limited to relatively low magnetic fields, and DNP at fields higher than 9.4 T significantly drops in efficiency. Here we report solid-state Overhauser effect DNP enhancements of over 100 at 18.8 T. This is achieved through the unexpected discovery that enhancements increase rapidly with increasing magic angle spinning rates. The measurements are made using 1,3-bisdiphenylene-2-phenylallyl (BDPA) dissolved in ortho-terphenyl (OTP) at 40 kHz MAS. We introduce a source-sink diffusion model for polarization transfer which is capable of explaining the experimental observations. The advantage of this approach is demonstrated on mesoporous alumina with the acquisition of well-resolved DNP surface enhanced 27Al CP spectra.
    • Relation:
      info:eu-repo/semantics/altIdentifier/pmid/28692804; info:eu-repo/grantAgreement/NHMRC//320860/EU/Health Outcomes Monitoring and Evaluation: Learning about Activity, Nutrition, Diet and Social Factors/; hal-01576023; https://hal.science/hal-01576023; https://hal.science/hal-01576023/document; https://hal.science/hal-01576023/file/jacs.7b05194.pdf; PUBMED: 28692804
    • الرقم المعرف:
      10.1021/jacs.7b05194
    • الدخول الالكتروني :
      https://hal.science/hal-01576023
      https://hal.science/hal-01576023/document
      https://hal.science/hal-01576023/file/jacs.7b05194.pdf
      https://doi.org/10.1021/jacs.7b05194
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • الرقم المعرف:
      edsbas.A284CC5B