Developments on 1H-13C DIPSHIFT recoupled variants are discussed as tools for characterizing intermediate-regime motions. Experimental results, spin dynamics simulations and Anderson-Weiss (AW) analytical treatments show the possibility of extracting motional rates (k) in an almost model free fashion. Based on the CHn dipolar pattern decomposition, a multi-gaussian approach that improves the AW treatment to CH2 and CH3 groups is proposed, see figure. The techniques were applied to study molecular motions in semiconducting polymers and find correlations with their optoelectronic properties.

Separated-local field NMR methods as tools for characterizing intermediate-regime motions in polymers

245th National Meeting (2013)

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