Dynamic Switching of the Circularly Polarized Luminescence of Disubstituted Polyacetylene by Selective Transmission through a Thermotropic Chiral Nematic Liquid Crystal

2014 ◽  
Vol 126 (40) ◽  
pp. 10817-10820 ◽  
Author(s):  
Benedict A. San Jose ◽  
Jialin Yan ◽  
Kazuo Akagi
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Circularly Polarized ◽  
Dynamic Switching ◽  
Chiral Nematic ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

scholarly journals Photon-upconverting chiral liquid crystal: significantly amplified upconverted circularly polarized luminescence

2019 ◽  
Vol 10 (1) ◽  
pp. 172-178 ◽  
Author(s):  
Xuefeng Yang ◽  
Jianlei Han ◽  
Yafei Wang ◽  
Pengfei Duan
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Circularly Polarized ◽  
Chiral Liquid Crystal ◽  
Chiral Nematic ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

By blending a chiral acceptor and a sensitizer into a nematic liquid crystal, a chiral nematic liquid crystal showing amplified upconverted circularly polarized luminescence could be obtained.

scholarly journals Sequentially amplified circularly polarized ultraviolet luminescence for enantioselective photopolymerization

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Dongxue Han ◽  
Xuefeng Yang ◽  
Jianlei Han ◽  
Jin Zhou ◽  
Tifeng Jiao ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Uv Light ◽  
Upconversion Emission ◽  
Delayed Fluorescence ◽  
Circularly Polarized ◽  
Thermally Activated ◽  
Chiral Nematic ◽  
Circularly Polarized Luminescence ◽  
Further Development

Abstract Chiral optical materials based on circularly polarized luminescence (CPL) have emerged rapidly due to their feasible applications in diverse fields of research. However, limited to the small luminescence dissymmetry factor (glum), real application examples have rarely been reported. Here, we present a complex system, which show intense circularly polarized ultraviolet luminescence (CPUVL) with large glum value, enabling a chiral UV light triggered enantioselective polymerization. By integrating sensitized triplet-triplet annihilation upconversion and CPL, both visible-to-UV upconversion emission and upconverted circularly polarized ultraviolet luminescence (UC-CPUVL) were obtained in the systems, built of chiral annihilator R(S)-4,12-biphenyl[2,2]paracyclophane (R-/S-TP), and a thermally activated delayed fluorescence (TADF) sensitizer. After dispersing this upconversion system into room-temperature nematic liquid crystal, induced chiral nematic liquid crystal could significantly amplify the glum value (0.19) of UC-CPUVL. Further, the UC-CPUVL emission has been used to trigger the enantioselective photopolymerization of diacetylene. This work paves the way for the further development of functional application of CPL active materials.

Circularly polarized luminescence in chiral nematic liquid crystals: generation and amplification

2021 ◽  
Author(s):  
Xuefeng Yang ◽  
Xue Jin ◽  
Tonghan Zhao ◽  
Pengfei Duan
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Excellent Performance ◽  
Circularly Polarized ◽  
Chiral Nematic ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Chiral nematic liquid crystals exhibit excellent performance in obtaining high luminescence dissymmetry factor of circularly polarized luminescence.

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