Proton NMR in nematic liquid crystalline solvents: The use of deuterium decoupling
- 1 June 1973
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 58 (11), 5089-5095
- https://doi.org/10.1063/1.1679098
Abstract
Nuclear magnetic resonance spectra of molecules dissolved in an oriented (nematic) solvent become exceedingly complex when the solute molecules contain more than about eight magnetic nuclei. In this paper a technique for greatly simplifying the proton spectra by partial deuterium substitution is described. The deuterium is decoupled by irradiation at a frequency corresponding to a double quantum deuteron transition. Experimental details are presented, as well as results obtained on partially deuterated cyclohexane. The behavior of the spectra as a function of deuterium irradiation intensity and frequency offset is shown in a series of experimental spectra, and compared with computer simulated spectra calculated with a theory presented in a companion paper. It is shown that the spectrum behavior under frequency offset of the irradiation can be a tool in the assignment of spectrum peaks.Keywords
This publication has 7 references indexed in Scilit:
- Theory of proton NMR with deuteron decoupling in nematic liquid crystalline solventsThe Journal of Chemical Physics, 1973
- Nuclear magnetic resonance spectra in liquid crystals and molecular structureAccounts of Chemical Research, 1971
- NMR Double Irradiation CircuitReview of Scientific Instruments, 1968
- Analysis of Nuclear Magnetic Resonance Spectra of Molecules in Liquid-Crystal SolventsThe Journal of Chemical Physics, 1965
- High-Resolution Nuclear Magnetic Resonance Spectra of Orientated MoleculesPhysical Review Letters, 1963
- Double-Quantum Transitions in Nuclear Magnetic Resonance Spectra of LiquidsPhysical Review B, 1957
- Nuclear Resonance Saturation Effects and Multiple-Quantum TransitionsPhysical Review B, 1956