Visualization of Biogenic Amines and In Vivo Ratiometric Mapping of Intestinal pH by AIE‐Active Polyheterocycles Synthesized by Metal‐Free Multicomponent Polymerizations

Acid‐base homeostasis is crucial for normal physiology, metabolism, and functions of living organisms. Thus, the development of effective techniques to monitor it either in vitro or in vivo is in great demand. Herein, a series of multifunctional oxazine‐containing polyheterocycles with aggregation‐induced emission characteristics are in situ generated by metal‐free one‐pot A 3 polymerizations of terminal diynes, dialdehydes, and ureas. Most of...