REDOR dephasing by multiple spins in the presence of molecular motion.


Closed-form, numerical algorithms are presented for calculating REDOR dephasing for three general cases: (i) collections of isolated I-S spin pairs; (ii) many S spins coupled to an I spin; and (iii) an I-S spin pair in relative motion. For the case when more than one S spin is dipolar coupled to an I spin, the calculation assumes that the S-S homonuclear interaction does not affect REDOR dephasing. Full numerical simulations show that this assumption is true if the S-spin lineshapes are inhomogeneously broadened, the S-spin chemical shifts are far from rotational resonance, and a version of REDOR is used which minimizes the number of S-spin pi pulses. For the rapidly rotating -CF3 group of poly(trifluoroethyl methacrylate), the formalisms of (ii) and (iii) are combined to calculate the dephasing. The experimentally measured dephasing matches theory when the wiggling motion of the -OCH2CF3 moiety of the polymer is taken into account.


Citations per Year

196 Citations

Semantic Scholar estimates that this publication has 196 citations based on the available data.

See our FAQ for additional information.

Cite this paper

@article{Goetz1997REDORDB, title={REDOR dephasing by multiple spins in the presence of molecular motion.}, author={Jon M. Goetz and Jacob Schaefer}, journal={Journal of magnetic resonance}, year={1997}, volume={127 2}, pages={147-54} }