Inside Cover: Click‐Functionalization of a Poly(Tetrazine‐co‐Fluorene)‐Conjugated Polymer with a Series of trans‐Cyclooctene Derivatives (Angew. Chem. Int. Ed. 6/2021)

The ability to post‐synthetically functionalize conjugated polymers by “plugging” various structures into the polymer backbone is demonstrated in the Research Article on page 2980 by Alex Adronov and co‐workers using inverse‐electron‐demand Diels–Alder (IEDDA) chemistry on a poly(tetrazine) polymer backbone. A small library of polymers was rapidly prepared by reacting a series of trans‐cyclooctyne derivatives with the poly(tetrazine).