A novel achiral polymer P‐1 is synthesized by the polymerization of (2,5‐bis(octyloxy)‐1,4‐phenylene)diboronic acid ( M‐1 ) with pyridine‐2,6‐diylbis(methanylylidene)bis(4‐iodoaniline) ( M‐2 ) via Pd‐catalyzed Suzuki coupling reaction. The tridentate ligand in the main chain backbone can further coordinate with Cu2+ to afford the corresponding achiral copper‐containing polymer complex P‐2 , which selectively responds to L‐/D‐histidine with significant fluorescence enhancement over other amino acids. Interestingly, P‐2 exhibits obvious CD response toward L‐ or D‐histidine compared with its model compound MC , indicating that this kind Cu(II)‐containing polymer complex sensor can be used as an effective chemosensor for enantioselective recognition of histidine enantiomers by means of CD spectroscopy.
