Switching of Circularly Polarised Luminescence in Perylene-Diimide-Based Chiral Liquid Crystals Induced by Electric Fields and Heating

IF 2.9 3区化学 Q3 CHEMISTRY, PHYSICAL

Physical Chemistry Chemical Physics Pub Date : 2025-06-04 DOI:10.1039/d5cp01592h

Daiya Suzuki, Seika Suzuki, Kosuke Kaneko, Tomonori Hanasaki, Motohiro Shizuma, Yoshitane Imai

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引用次数: 0

Abstract

Two pairs of chiral perylene-based luminescent materials, namely (R,R)/(S,S)-N,N’-bis(1-phenylethyl)perylene-3,4,9,10-tetracarboxylic diimide [(R,R)/(S,S)-BPP] and (R,R)/(S,S)-N,N’-bis(1-cyclohexylethyl)perylene-3,4,9,10-tetracarboxylic diimide [(R,R)/(S,S)-CPDI], were doped into a nematic liquid crystal with a low phase transition temperature, 4'-hexyl-4-biphenylcarbonitrile. The resultant luminescent chiral nematic liquid crystals (N*-LCs) exhibited a circularly polarised luminescence (CPL) stronger than that of chiral poly(methyl methacrylate)-based luminescent films containing BPP and CPDI. Both N*-LCs displayed reversible CPL property responses (CPL intensity and CPL sign inversion) upon the application of a direct-current (DC) electric field (due to a chiral nematic phase → nematic phase transition) and heating (due to a chiral nematic phase → isotropic phase transition). Thus, an on-off-on CPL system controlled by DC electric fields and thermal stimuli was constructed based on a transition from a uniformly aligned helical structure to another orientational arrangement. This work provides an effective strategy for the development of functional CPL devices based on CPL control via N*-LC exposure to DC electric fields or heat.

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电场和加热诱导苝-二亚胺基手性液晶圆偏振发光的开关

将两对手性苝基发光材料（R，R）/(S，S)-N,N '-双（1-苯基乙基）苝-3,4,9,10-四羧基二亚胺[(R，R)/(S，S)-BPP]和（R，R）/(S，S)-N,N '-双（1-环己基乙基）苝-3,4,9,10-四羧基二亚胺[(R，R)/(S，S)-CPDI]掺杂到低相变温度的向列相液晶4'-己基-4-联苯碳腈中。所制得的手性向列相发光液晶（N*- lc）表现出比含有BPP和CPDI的手性聚甲基丙烯酸甲酯基发光膜更强的圆极化发光（CPL）。两种N*- lc在施加直流（DC）电场（由于手性向列相→向列相转变）和加热（由于手性向列相→各向同性相变）时均表现出可逆的CPL特性响应（CPL强度和CPL符号反转）。因此，基于从均匀排列的螺旋结构到另一种取向排列的转变，构建了由直流电场和热刺激控制的开关CPL系统。这项工作为开发基于N*-LC暴露于直流电场或热下的CPL控制的功能性CPL器件提供了有效的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Chemistry Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

5.50

自引率

9.10%

发文量

2675

审稿时长

2.0 months

期刊介绍： Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.