Chiral-based optical and electrochemical biosensors: Synthesis, classification, mechanisms, nanostructures, and applications

Chemical Engineering Journal, Год журнала: 2024, Номер 497, С. 155562 - 155562

Опубликована: Сен. 10, 2024

Язык: Английский

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Circularly Polarized Organic Ultralong Room‐Temperature Phosphorescence: Generation, Enhancement, and Application

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 16, 2024

Abstract Circularly polarized luminescent (CPL) materials have garnered tremendous attention owing to their expanded optical properties beyond emission wavelength and intensity. Among these, the emerging circularly organic ultralong room‐temperature phosphorescence (CP‐OURTP) materialsdemonstrating elegant distinct features are of significant importance for extended lifetime, which represent a novel frontier in research with promising scientific technological applications across diverse fields. This review systematically outlines traditional strategies achieve CP‐OURTP including crystals, copolymerization, host–guest doping, combination copolymerization spinning twisting technology, supramolecular polymer assembly. Importantly, recent progress chiral soft materials, such as liquid crystals (LCs) involving lyotropic LCs (cellulose nanocrystals, CNCs) thermotropic (cholesteric LC elastomers), is showcased. Finally, practical summarized, concludes perspectives on current challenges future opportunities materials. aims inspire further innovations fabrication advanced enrich applications.

Язык: Английский

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Generation, Inversion, and Amplification of Intrinsic Circularly Polarized Room Temperature Phosphorescence in Chiral Carbon Dots

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 20, 2024

Abstract Chiral carbon dots (C‐dots) with circularly polarized luminescence emission have attracted tremendous attention, but achieving room temperature phosphorescence (CPRTP) C‐dots is still challenging. The present contribution reports the success in constructing intrinsic CPRTP property through an eco‐friendly solvent‐free pyrolysis method using urea and (R/S)‐1,1′‐binaphthyl‐2,2′‐diamine as precursors. obtained exhibit fluorescence (CPF) dual dissymmetric factors of 10 −3 , accompanied by long lifetime up to 400 ms. Detailed experimental characterizations theoretical calculations show that presence carbonyl groups nitrogen atoms well charge transfer excitation within crucial for RTP emission. More importantly, upon incorporation achiral helical polyacetylene, chirality from nanoscale chains effectively occurs during film formation process, resulting amplified chiroptical performance. Significantly, based on synergistic interaction “circularly excitation” “re‐polarization” mechanisms, inversion amplification CPF/CPRTP emissions large 2.0 × −2 /2.2 are observed C‐dots/polyacetylene composite films. This work provides a platform construction novel materials significant potentials.

Язык: Английский

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

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер unknown, С. 725 - 730

Опубликована: Янв. 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.

Язык: Английский

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Enhanced Photoactivated Circularly Polarized Afterglow with High Dissymmetry Factor and Tunable Emission

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 5, 2025

Abstract Photoactivated circularly polarized afterglow (CPA) exhibits broad application prospects in various optoelectronic areas due to its multidimensional emission characteristics, including wavelengths, lifetimes, and chirality. Achieving photoactivated CPA with extremely high dissymmetry factor ( g lum ) values is highly desired but considerably challenging. This work reports a bilayer assembly (R/S‐CLC‐TPB) integrating TPB@PMMA thin film the selective reflection of cholesteric liquid crystals. Initially, R/S‐CLC‐TPB no emission, while following 1 min UV irradiation, it achieves an noticeable long lifetime 125 ms value up 1.6. enhancement can be attributed oxygen consumption properties under subsequently minimizing loss triplet exciton. Furthermore, by employing triplet‐singlet Förster resonance energy transfer (TS‐FRET) strategy from organic persistent room‐temperature phosphorescence donor fluorescent dye acceptor, color successfully modulated green orange. Ultimately, these materials demonstrate promising capabilities for advanced multi‐level information encryption utilizing their tunable color, create multiple layers that selectively accessed decoded based on photoactivation chiroptical properties.

Язык: Английский

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Tunable circularly polarized electroluminescence behaviors from chiral co-assembled conjugated liquid crystal polymers

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 678, С. 1213 - 1222

Опубликована: Сен. 24, 2024

Язык: Английский

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Variable Energy Transfer in One-Dimensional Chiral Mn/Cd-Based Halides and the Strong Stereo-Selective Fluorescence for Chiral Recognition

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

One-dimensional luminescent chiral metal halides with variable energy transfer were designed, thus contributing to strong stereo-selective fluorescence.

Язык: Английский

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