Relaxation effects in weakly-coupled three spin systems by double resonance |
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| Authors: | N.R. Krishna B.D. Nageswara Rao |
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| Affiliation: | 1. Department of Physics , Indian Institute of Technology , Kanpur, U.P., India;2. School of Chemistry, Georgia Institute of Technology , Atlanta, Georgia, 30332;3. Department of Physics , Indian Institute of Technology , Kanpur, U.P., India |
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| Abstract: | ![]()
Nuclear magnetic double-resonance spectra of weakly-coupled spin systems exhibit several interesting features. The effect of relaxation on the symmetry properties of double resonance spectra of weakly-coupled spin systems is investigated using spin inversion operators. The double-resonance spectra of the AX2 type systems formed by the protons in (I) 1,1,2-trichloroethane and in (II) 2,2-dichloroethanol (excluding the hydroxyl proton) exhibit these symmetry effects. In both these molecules relaxation is contributed by several mechanisms. In sample II the effect of the exchanging proton in the hydroxyl group is also considered and the exchange time is estimated. |
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