Conjugated [5]Cumulene Polymers from Propargylic Monomers

Key words

[5]cumulene - conjugated polymers - propargylic alcohol - step-growth polymerization

Significance

Due to the challenging syntheses and instability of high cumulenes, their functional explorations are limited. Here, a step-growth poly­merization method is reported for achieving conjugated high polymers featuring [5]cumulene as a repeat­ unit.

Comment

To tackle the stability issue, substituents are introduced at the ortho-position of the aryl side groups, providing steric protection by adjusting the torsion angles with respect to the main chain. Improved stability, as well as backbone planarity, is observed with the polymers.

Publication History

Article published online:
16 January 2024