Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (2): 399-404.doi: 10.3866/PKU.WHXB201511272

• REVIEW • Previous Articles     Next Articles

The Solid-State Photo-CIDNP Effect

Xiao-Jie WANG1,*(),Smitha Surendran THAMARATH2,3,A. ALIA2,3,4,E. BODE Bela5,Jörg MATYSIK2,3,*()   

  1. 1 Department of Chemistry and Biology, College of Science, National University of Defense Technology, Changsha 410073, P. R. China
    2 Institut für Analytische Chemie, Universität Leipzig, Linnéstr. 3, 04103 Leipzig, Gemany
    3 Leiden Institute of Chemistry, Einsteinweg 55, 2300 RA Leiden, The Netherlands
    4 Institute of Medical Physics and Biophysics, University of Leipzig, D-04107 Leipzig, Germany
    5 EaStCHEM School of Chemistry and Biomedical Sciences Research Complex, University of St Andrews, St Andrews, KY16 9ST, Scotland
  • Received:2015-09-21 Published:2016-01-30
  • Contact: Xiao-Jie WANG,Jörg MATYSIK;
  • Supported by:
    the Netherlands Organization for Scientific Research (NWO)(713.012.001)


Photochemically induced dynamic nuclear polarization (photo-CIDNP) is an effect that produces non-Boltzmann nuclear spin polarization, which can be observed as a modification of signal intensity in nuclear magnetic resonance (NMR) spectroscopy. The effect is well known in liquid-state NMR, where it is explained most generally by the classical radical pair mechanism (RPM). In the solid-state, additional mechanisms are operative in the spin-dynamics of radical pairs, such as three-spin mixing (TSM), differential decay (DD) and differential relaxation (DR). The observed solid-state photo-CIDNP effect is strongly magnetic field dependent, and this field-dependence is well distinguished for the various nuclei. Here, we provide an account of the phenomenology, theory and properties of the magnetic field dependence of the solid-state photo-CIDNP effect.

Key words: Photo-CIDNP, Magic angle spinning, Nuclear magnetic resonance, Radical pair, Spin chemistry


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