• Media type: E-Article
  • Title: 14N NQR Spectroscopy of Some Amino Acids and Nucleic Bases via Double Resonance in the Laboratory Frame
  • Contributor: Blinc, R.; Mali, M.; Osredkar, R.; Prelesnik, A.; Seliger, J.; Zupančič, I.; Ehrenberg, L.
  • Published: AIP Publishing, 1972
  • Published in: The Journal of Chemical Physics, 57 (1972) 12, Seite 5087-5093
  • Language: English
  • DOI: 10.1063/1.1678193
  • ISSN: 0021-9606; 1089-7690
  • Keywords: Physical and Theoretical Chemistry ; General Physics and Astronomy
  • Origination:
  • Footnote:
  • Description: The 14N nuclear quadrupole resonance spectra and spin-lattice relaxation times of the amino acids histidine, methionine, cystine, cysteine, and tyrosine as well as of the nucleic bases uracil, thymine, cytosine, and guanine have been determined by a 14N-proton double resonance technique in the laboratory frame. The experiments were performed on polycrystalline samples at 77°K or above this temperature. A theoretical estimate of the sensitivity of this method for a variety of experimental conditions is as well presented. It is shown that in contrast to usual double resonance techniques the method works even in the case of a short proton spin-lattice relaxation time if only the nitrogen relaxation time is long.