Benzothiadiazole‐Containing Conjugated Polyelectrolytes for Biological Sensing and Imaging

This article summarizes the recent advances of benzothiadiazole (BT)‐containing conjugated polyelectrolytes (CPEs) for biological sensing and imaging. After a brief introduction of the molecular design principles, the application of linear BT‐containing CPEs as multicolor or light‐up probes for visual sensing of biomolecules is reviewed. Then, linear, grafted, and hyperbranched BT‐containing CPEs that can self‐assemble into nanoparticles or have intrinsic 3D structures for in vitro and in vivo imaging are summarized. The future outlook of BT‐containing CPEs for biomedical applications is also discussed at the end.