FIG. 7.

NOVEL experiments in BDPA/PS samples at 300 K using 150 ns mixing and 36 μs repetition time. (a) In a fully protonated sample, we obtained an enhancement of 100. (b) In a sample with mixed PS-d₈/d₅ (95:5), the ¹H concentration is diluted by a factor of 50, making it impossible to acquire the off signal in a reasonable amount of time. We, therefore, estimate the enhancement in the sample using the off signal of the fully protonated sample as the reference. Taking into account the dilution factor and the amount of sample, we obtained an enhancement of 323. The intensities were normalized to the μw off signal from protonated PS sample.