Enhancing Circularly Polarized Luminescence in Chiral Fluorescent Dyes via Cholesteric Liquid Crystal Polymer Networks DOI
Jiaojiao Liu,

Li-Ting Xu,

Ning Yang

et al.

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Materials with circularly polarized luminescence have garnered significant attention due to their applications in anticounterfeiting and displays. In this work, we synthesized a pair of AIEgens, designated as D- L-TA-TPE, dopants by utilizing tartaric acid tetraphenylethylene. These AIEgens were incorporated into nematic liquid crystal polymer network films. The resulting films exhibited |glum| values about 7.0 × 10–3, which can be attributed the chiral conformations these two AIEgens. For AIEgen-doped cholesteric (CLCN) films, selective Bragg reflection CLCN reached 0.7. When composite incorporating both fluorescent layers examined, 1.6. value increased increasing film thickness. patterns prepared using photomask or through screen printing. Based on handedness CPL, distinct images observed left- right-handed circular polarizers. Therefore, are potentially applied for decoration anticounterfeiting.

Language: Английский

Circularly Polarized Room-Temperature Phosphorescence from Dye-Doped Cholesteric Liquid Crystalline Polymer Networks DOI
Wei Zhang,

Peipei Guan,

Jinghua Zhao

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 725 - 730

Published: Jan. 12, 2025

Circularly polarized luminescence (CPL) materials have drawn increasing attention for their potential applications in optical displays and chemo/biosensing. Nevertheless, the construction of circularly room-temperature phosphorescence (CPRTP) is still a significant challenge. In this work, four liquid crystalline polymer network films with RTP properties been fabricated via photopolymerization cholesteric liquid-crystalline mixtures containing different amounts commercially available dyes. The show yellow-green structural color, enhanced RTP, blue CPL, green CPRTP dissymmetry factors up to -0.90, quantum yields 14.8%, emission lifetimes 607 ms. Furthermore, prepared film pattern presents colors reflective, fluorescent, phosphorescent modes. This work not only provides deep understanding CPRTP, but also facile strategy fabricate patterns decoration anticounterfeiting applications.

Language: Английский

Citations

0
Enhancing Circularly Polarized Luminescence in Chiral Fluorescent Dyes via Cholesteric Liquid Crystal Polymer Networks DOI
Jiaojiao Liu,

Li-Ting Xu,

Ning Yang

et al.

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Materials with circularly polarized luminescence have garnered significant attention due to their applications in anticounterfeiting and displays. In this work, we synthesized a pair of AIEgens, designated as D- L-TA-TPE, dopants by utilizing tartaric acid tetraphenylethylene. These AIEgens were incorporated into nematic liquid crystal polymer network films. The resulting films exhibited |glum| values about 7.0 × 10–3, which can be attributed the chiral conformations these two AIEgens. For AIEgen-doped cholesteric (CLCN) films, selective Bragg reflection CLCN reached 0.7. When composite incorporating both fluorescent layers examined, 1.6. value increased increasing film thickness. patterns prepared using photomask or through screen printing. Based on handedness CPL, distinct images observed left- right-handed circular polarizers. Therefore, are potentially applied for decoration anticounterfeiting.

Language: Английский

Citations

0