Circularly polarized room-temperature phosphorescence based on chiral co-assembled helical nanofiber from chiral co-assembled liquid crystal co-polymer

The design of excellent circularly polarized room -temperature phosphorescence (CP-RTP) materials remains a significant challenge. To date, there has been no report on inducing CP-RTP utilizing a chiral supramolecular coassembled strategy in liquid crystal media. This study designed and synthesized three achiral co -polymers ( P1 / P2 / P3 ) to co -assemble with chiral inducer R / S -I as ( R / S -I) m -(P1 / P2 / P3) n . Among them, P2 / P3 self -assembled into a nematic crystal (N-LCs) phase, while P1 was an amorphous co -polymer. All P1 / P2 / P3 solutions exhibited weak dual phosphorescence emission behavior at 77 K. Interestingly, co -polymers P1 / P2 exhibited strong phosphorescence emission in film under ambient conditions, which originated from the radical anions. Notably, the chiral co -assembled films ( R -I) m -(P1 / P2) n displayed rapid photochromic properties and stronger RTP triggered by photothermal synergy. After UV irradiation, the chiral co -assembled film ( R / S -I) 0.23 -(P 2 ) 0.77 -UV emitted stronger CP-RTP ( lambda em = 592 nm, g em = +/- 7.89 x 10 -2 , and Phi Phos = 12.00 %) due to the formation of helical nanofibers. The information protection and delivery capabilities were demonstrated through the establishment of Morse code.