Circularly Polarized Room-Temperature Phosphorescence from Dye-Doped Cholesteric Liquid Crystalline Polymer Networks

IF 4.6 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2025-01-12 DOI:10.1021/acs.jpclett.4c03479

Wei Zhang, Peipei Guan, Jinghua Zhao, Yonggang Yang, Hongkun Li

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Abstract

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

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染料掺杂胆甾液晶聚合物网络的室温圆极化磷光

圆偏振发光材料因其在光学显示和化学/生物传感方面的潜在应用而受到越来越多的关注。然而，圆极化室温磷光（CPRTP）材料的构建仍然是一个重大的挑战。在这项工作中，通过含有不同量的市售染料的胆甾型液晶混合物的光聚合制备了四种具有RTP性能的液晶聚合物网络薄膜。薄膜呈现黄绿色结构色，增强RTP，蓝色CPL和绿色CPRTP，磷光不对称因子高达- 0.90，量子产率高达14.8%，发射寿命高达607 ms。此外，制备的薄膜图案在反射、荧光和磷光模式下呈现不同的颜色。这项工作不仅提供了对RTP和CPRTP的深刻理解，而且提供了一种简单的策略来制作用于装饰和防伪应用的薄膜图案。

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.