This manuscript is dedicated to Professor Mitsuo Sawamoto's outstanding achievements in polymer chemistry and recognizes his recent retirement from 40 years of exceptional service to Kyoto University.To address this challenge and provide insight into photo-CRP processes, a recently developed in situ NMR spectroscopy method is utilized to evaluate temporal control for a selection of widely studied photo-CRP processes (see Fig. 1 and Supplementary Information Figure S1 for a Additional supporting information may be found in the online version of this article.

The use of methylhydroquinones enables the preparation of block copolymers having phenylene rings with precisely 2, 3 or 4 quaternary ammonium groups. Membrane properties show the importance of controlling the local ionic distribution to reach high anion conductivity.

Aromatic polyimides containing different ratios of ortho-hydroxy to ortho-allyloxy units were prepared and thermally rearranged.