Circularly polarized organic afterglow materials with unique chiroptical properties and sustained luminescence capabilities, exhibit significant potential for applications in 3D displays, information storage and encryption, and chiroptical devices. In this study, a series of chiral ionic liquid copolymers with circularly polarized afterglow properties were prepared and optimized by introducing axially chiral ionic liquid copolymerization with acrylamide. The experimental results show that the R-PAMVIm BNDHP-1% and S-PAMVIm BNDHP-1% films exhibit excellent circularly polarized luminescence performance, sustained green ultra-long afterglow (~6 s), phosphorescence lifetimes of 1.02 s and 1.20 s, and luminescence dissymmetry factors reaching 2.09×10-3 and -2.52×10-3, respectively. Based on their superior afterglow characteristics, these materials were successfully applied to enantiomer recognition studies. Under the irradiation of 302 nm UV lamp, the visual identification of D/L-histidine and D/L-phenyllactic acid could be achieved. This research successfully developed a simple and efficient chiral recognition material, and also provided design insights for creating new types of optical materials with multi-level information processing capabilities and chiral sensing properties.
ZinnaF, GiovanellaU, BariL D. Highly circularly polarized electroluminescence from a chiral europium complex[J]. Advanced Materials, 2015, 27(10): 1791-1795.
[2]
SangY, HanJ, ZhaoT, et al. Circularly Polarized luminescence in nanoassemblies: Generation, amplification, and application[J]. Advanced Materials, 2020, 32(41): 1900110.
[3]
BrandtJ R, WangX, YangY, et al. Circularly polarized phosphorescent electroluminescence with a high dissymmetry factor from PHOLEDs based on a platinahelicene[J]. Journal of the American Chemical Society, 2016, 138(31): 9743-9746.
[4]
HeffernM C, MatosziukL M, MeadeT J. Lanthanide probes for bioresponsive imaging[J]. Chemical Reviews, 2014, 114(8): 4496-4539.
[5]
LiuY, GaoX, ZhaoB, et al. Circularly polarized luminescence in quantum dot-based materials[J]. Nanoscale, 2024, 16(14): 6853-6875.
[6]
MacKenzieL E, PalR. Circularly polarized lanthanide luminescence for advanced security inks[J]. Nature Reviews Chemistry, 2021, 5(2): 109-124.
[7]
LiuJ, SongZ P, WeiJ, et al. Circularly polarized organic ultralong room-temperature phosphorescence with a high dissymmetry factor in chiral helical superstructures[J]. Advanced Materials, 2024, 36(7): 2306834.
[8]
HuangW, ZhuY, ZhouK, et al. Boosting circularly polarized luminescence from alkyl-locked axial chirality scaffold by restriction of molecular motions[J]. Chemistry-A European Journal, 2024, 30(14): e202303667.
[9]
WanS P, LuH Y, LiM, et al. Advances in circularly polarized luminescent materials based on axially chiral compounds[J]. Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 2022, 50: 100500.
[10]
Gu L, Ye W, Liang X, et al Circularly polarized organic room temperature phosphorescence from amorphous copolymers[J]. Journal of the American Chemical Society, 2021, 143(44): 18527-18535.
[11]
WeiL, GuoS, ZhangB, et al. Tuning circularly polarized afterglow color via modulation of energy and chirality transfer in Co-doped films[J]. Advanced Functional Materials, 2024, 34(51): 2409681.
[12]
ZhangJ, ZhangS, SunC, et al. Highly bright pure room temperature phosphorescence for circularly polarized organic hyperafterglow[J]. Advanced Materials, 2025: 2500953.
[13]
YangZ, XuC, LiW, et al. Boosting the quantum efficiency of ultralong organic phosphorescence up to 52% via intramolecular halogen bonding[J]. Angewandte Chemie International Edition, 2020, 59(40): 17451-17455.
[14]
ZhangS Y, ZhuangQ, ZhangM, et al. Poly(ionic liquid) composites[J]. Chemical Society Reviews, 2020, 49(6): 1726-1755.
[15]
QianW, TexterJ, YanF. Frontiers in poly(ionic liquid)s: Syntheses and applications[J]. Chemical Society Reviews, 2017, 46(4): 1124-1159.
[16]
ZhangZ Y, XuW W, XuW S, et al. A synergistic enhancement strategy for realizing ultralong and efficient room-temperature phosphorescence[J]. Angewandte Chemie International Edition, 2020, 59(42): 18748-18754.
[17]
WeiJ, LiuC, DuanJ, et al. Conformation-dependent dynamic organic phosphorescence through thermal energy driven molecular rotations[J]. Nature Communications, 2023, 14(1): 627.
[18]
ZengM, WangW, ZhangS, et al. Enabling robust blue circularly polarized organic afterglow through self-confining isolated chiral chromophore[J]. Nature Communications, 2024, 15(1): 3053.
[19]
JhunB H, ParkS Y, YouY. Molecular sensors producing circularly polarized luminescence responses[J]. Dyes and Pigments, 2023, 208: 110786.
[20]
HuM, FengH T, YuanY X, et al. Chiral AIEgens-Chiral recognition, CPL materials and other chiral applications[J]. Coordination Chemistry Reviews, 2020, 416: 213329.
[21]
BarmanK, IslamM M, DasK S, et al. Recent advances in enantiorecognition and enantioseparation techniques of chiral molecules in the pharmaceutical field[J]. Biomedical Chromatography, 2025, 39(2): e6073.