Jaeckle, H.Haeberlen, UlrichSchweitzer, Dieter2011-07-062016-03-312011-07-062016-03-311971350272166http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-63642http://elib.uni-stuttgart.de/handle/11682/7547http://dx.doi.org/10.18419/opus-7530An apparatus suitable to measure 13C relaxation times T1 and T2 in liquids at 62 MHz is described. The required field of 58 kG is generated by a superconducting magnet. Results of T1 measurements on a variety of liquids, including benzene, derivatives of benzene, saturated rings, CS2, and others are reported. They are discussed in terms of dipole-dipole interactions, spin-rotation interactions and anisotropic chemical shifts, the latter of which turn out to play only a minor role. Intramolecular dipole-dipole interactions are found to provide by far the most important spin-lattice relaxation mechanism, whenever protons are bound directly to the carbons under investigation, even when the samples contain dissolved oxygen.eninfo:eu-repo/semantics/openAccessMagnetische Relaxation , NMR-Spektroskopie530article