Constants of motion in NMR spectroscopy |
| |
Authors: | Walls Jamie D Lin Yung-Ya |
| |
Affiliation: | Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA. jwalls@fas.harvard.edu |
| |
Abstract: | We present a general method for constructing a subset of the constants of motion in terms of products of spin operators. These operators are then used to give insight into the multi-spin orders comprising the quasi-equilibrium state formed under a Jeener-Broekaert sequence in small, dipolar-coupled, spin systems. We further show that constants of motion that represent single-quantum coherences are present due to the symmetry of the dipolar Hamiltonian under 180 degrees spin rotations, and that such coherences contribute a DC component to the FID which vanishes in the absence of the flip-flop terms and is only present for spin clusters with an odd number of spins. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|