| Autor: |
Ahn, Sangdoo, Lisitza, Natalia, Warren, Warren S. |
| Zdroj: |
Journal of Magnetic Resonance; August 1998, Vol. 133 Issue: 2 p266-272, 7p |
| Abstrakt: |
Intermolecular zero-quantum coherences (iZQC) induced by the dipolar demagnetizing field can give bothP- andN-type cross peaks. This paper shows that the relative intensities of the two types of iZQC peaks follow a simple relation, tan2(θ/2), from both the quantum (spin density matrix) and classical (modified Bloch equation) calculations. The experimental data and numerical simulations agree well with the prediction. In addition, higher-order iZQCs are experimentally examined for the first time and are explained by the quantum picture in which dipolar couplings convert four-spin operators into observable magnetization. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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