Ultrastrong Host-Guest Recognition Driven Chiral Supramolecular Polymers with Circularly Polarized Luminescence in Water.

Chiral supramolecular polymers offer a versatile platform for constructing dynamic functional materials, yet their development in aqueous media remains challenging due to weak host-guest interactions and limited chiral macrocyclic systems. Herein, we report a water-soluble chiral luminescent supramolecular polymer assembled from a pair of chiral macrocycle ((R)-/(S)-C[4]B) and an achiral bis-thiazole orange guest. The ultrahigh binding affinity between the host and guest enables stable one-dimensional polymerization in water. Efficient chirality transfer from the macrocyclic host to the achiral luminophore gives rise to pronounced circular dichroism (CD) and circularly polarized luminescence (CPL). The resulting polymer exhibits red emission (625 nm) with a luminescence dissymmetry factor of 8.5 × 10-3. This work provides an effective strategy for the development of aqueous CPL-active supramolecular polymers through ultrastrong host-guest recognition.