Measurement of spin-lattice relaxation times of 13C in organic solids

Jinyuan Zhou, Riqiang Fu, Jian Zhi Hu, Liyun Li, Chaohui Ye

Research output: Contribution to journalArticlepeer-review


A transient nuclear Overhauser effect (NOE) makes measurements of the 13C spin-lattice relaxation times in organic solids complicated. Extended Solomon equations are applied in order to describe 13C spin-lattice relaxation with 1H r.f. field irradiation. Spin-lattice relaxation under r.f. irradiation is shown to be generally a triple-exponential process, but it can be reduced to be single-exponential under stronger r.f. field irradiation as well as in the absence of 1H initial magnetizations. Based on numerical calculations, the difference between spin-lattice relaxation curves obeying TC1 < TH1 and those obeying TC1 > TH1 is clearly indicated. The methyl group resonances in solid-state L-valine are examined, and the experimental results agree well with the theoretical results.

Original languageEnglish (US)
Pages (from-to)291-299
Number of pages9
JournalSolid State Nuclear Magnetic Resonance
Issue number4
StatePublished - Feb 1997
Externally publishedYes


  • C spin-lattice relaxation
  • Extended Solomon equations
  • H r.f. Field irradiation
  • Transient nuclear Overhauser effect

ASJC Scopus subject areas

  • Radiation
  • Chemistry(all)
  • Nuclear and High Energy Physics
  • Instrumentation


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