Sample: ca. 3 wt% regio-random P3HT in CDCl3.

Red spectrum is regular 13C. experiment time = 28 min.

Blue spectrum is DEPT135. experiment time =18 min. S/N is about 3 times better, with about 1/2 of experiment time compared to regular 13C. Also clarifies assignment of protonated vs non-protonated carbon peaks.

It is straightforward to setup and run the DEPT experiment. Refer to the “Training Materials” section of this blog to find out.