Fig. 4. Plot of T 2′CPMG of Q3/4(29Si) sites as a function of the spinning frequency together with the free induction decays (FIDs) of 1H–29Si CP/CPMG experiments recorded at 10 and 40 kHz MAS frequency. SPNAL-64 decoupling at the 130 kHz RF field was applied during acquisition. The other experimental details were the same as those given in the caption of Fig. 3a.
