Circularly Polarized Luminescence in Cellulose‐Based Assemblies: Synthesis, Regulation, and Application

Small, Год журнала: 2024, Номер unknown

Опубликована: Дек. 23, 2024

Abstract Currently, circularly polarized luminescence (CPL) has drawn wide interest in 3D display, information storage, and optical sensing. However, traditional synthetic paths are often accompanied by low chiral intensity complex processes. Cellulose nanocrystals (CNCs), with the properties of liquid crystals, can spontaneously arrange into left‐handed layered nanofilm, which enables them candidates construction CPL materials. Following this approach, work reviews synthesis cellulose‐based luminescent The co‐assembly technique, situ intercalation strategy, defect destruction design efficient encapsulating luminophores CNC organization. Next, various strategies on regulation, including matching photonic bandgap, pathway design, tailored helical structure, summarized. These offer new sights control, mainly focusing amplification inversion signals. Multimodal convertible chiroptical signals enable films practical values anti‐counterfeit, sensing, handedness induction. Overall, timely overview summarizes synthesis, application materials, aims to inspire development

Язык: Английский

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Synthesis and Properties of Mesogen-Jacketed Liquid Crystal Copolymers with Long-Lived Circularly Polarized Room-Temperature Phosphorescence

ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(16), С. 9582 - 9592

Опубликована: Авг. 3, 2024

Circularly polarized phosphorescence (CPP) materials, integrating the advantages of with circularly luminescence, show wide applications in many fields. However, designing and preparing pure organic CPP materials remain challenging, as ensuring stability triplet excitons at room temperature while achieving chiral transfer from structures to achiral chromophores is difficult. Herein, we propose a strategy harness structural features mesogen-jacketed liquid crystal polymers (MJLCPs) for material construction. A monomer MJ0Chol phosphorescent MJ0DFM are polymerized prepare homopolymers PMJ0Chol PMJ0DFM copolymers DFM(x)-Chol(y). The lifetime effectively enhanced by "jacketing" effect MJLCPs, luminescence activated through construction helical columnar phase. With content component increasing, gradually improves. Meanwhile, |glum| values samples exhibit an initial increase followed decrease increasing cholesterol content. DFM(0.6)-Chol(0.4) shows highest glum both fluorescence phosphorescence, reaching −4.4 × 10–3 −7.1 10–3, respectively. can be achieved 252 ms.

Язык: Английский

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A Universal Strategy for Multi-Color Organic Circularly Polarized Afterglow Materials with High Dissymmetry Factor

Опубликована: Авг. 28, 2024

Materials with pure organic circularly polarized afterglow (CPA) are notable for their multi-dimensional optical characteristics due to time-dependent and polarization properties. These attributes endow them exceptional appeal value in the realms of information storage anti-counterfeiting measures. Currently, there limited studies on multi-color CPA materials both high dissymmetry factor (glum) values long lifetimes. Here, we propose a universal strategy prepare spanning from blue red, an ultralong emission lifetime over 6 s glum up 100 (the highest was 1.90). This leverages mechanism radiative energy transfer selective reflection cholesteric liquid crystals. Through multi-layered assembly, our method offers simple means constructing encryption.

Язык: Английский

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Highly transparent cellulose-based phosphorescent materials with tunable afterglow colors and white emission

Carbohydrate Polymers, Год журнала: 2024, Номер 341, С. 122309 - 122309

Опубликована: Май 22, 2024

Язык: Английский

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Optically active persistent luminescence in supramolecular nanoassemblies constructed from entirely achiral building blocks

Nano Today, Год журнала: 2024, Номер 59, С. 102516 - 102516

Опубликована: Окт. 3, 2024

Язык: Английский

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