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Published on: June 2, 2017
Ultrastrong Host-Guest Recognition Driven Chiral Supramolecular Polymers with Circularly Polarized Luminescence in
Ya-Ping Chen1, Si-Dan Guo1, Jinlei Zhou1
1State Key Laboratory of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, China.
Abstract:
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.
