Chiral Nanostructures from Artificial Helical Polymers: Recent Advances in Synthesis, Regulation, and Functions

ACS Nano, Год журнала: 2025, Номер 19(1), С. 229 - 280

Опубликована: Янв. 4, 2025

Helical structures such as right-handed double helix for DNA and left-handed α-helix proteins in biological systems are inherently chiral. Importantly, chirality at the nanoscopic level plays a vital role their macroscopic chiral functionalities. In order to mimic functions of natural nanoarchitectures, variety nanostructures obtained from artificial helical polymers prepared, which can be directly observed by atomic force microscopy (AFM), scanning tunneling (STM), electron (SEM), transmission (TEM). This review mainly focuses on formation morphology regulation triggered polymer chain length, concentration, solvent, temperature, photoirradiation, chemical additives. addition, distinct including recognition, circularly polarized luminescence, drug release, cell imaging, antibiosis also discussed.

Язык: Английский

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Chiral Co‐Assembly with Narrowband Multi‐Resonance Characteristics for High‐Performance Circularly Polarized Organic Light‐Emitting Diodes

Advanced Materials, Год журнала: 2024, Номер 36(38)

Опубликована: Июль 25, 2024

A promising kind of ternary chiral co-assemblies with high PLQY, large dissymmetry factor (g

Язык: Английский

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Circularly Polarized Phosphorescence Energy Transfer Combined with Chirality‐Selective Absorption for Modulating Full‐Color and White Circularly Polarized Long Afterglow

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Июль 11, 2024

Circularly polarized long afterglow (CPLA) attracts great interests in multi-disciplinary fields with significant potentials optical multiplexing applications, but achieving full-color and white CPLA is still challenging. The present contribution reports the first success utilizing circularly phosphorescence energy transfer (CPP-ET) combined chirality-selective absorption (CSA) to construct materials. Blue luminescence dissymmetry factor (g

Язык: Английский

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A Dynamic H‐Bonding Network Enables Stimuli‐Responsive Color‐Tunable Chiral Afterglow Polymer for 4D Encryption

Advanced Materials, Год журнала: 2024, Номер 36(47)

Опубликована: Окт. 6, 2024

Abstract The development of stimuli‐responsive and color‐tunable chiral organic afterglow materials has attracted great attention but remains a daunting challenge. Here, simple yet effective strategy through the construction dynamic H‐bonding network is proposed to explore multi‐color by doping self‐designed phosphorescent chromophore into polyvinyl alcohol matrix. A deep blue system with lifetime up 3.35 s, quantum yield 25.0%, luminescent dissymmetry factor 0.05 achieved reversible formation breakdown upon thermal‐heating water‐fumigating. Moreover, can be obtained energy transfer, allowing establishment information displays high‐level 4D encryption. This work not only offers facile platform develop advanced also opens new avenue for developing next‐generation optical technology enhanced functionality responsiveness.

Язык: Английский

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Endowing single-crystal polymers with circularly polarized luminescence

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 2, 2025

The preparation of single-crystal polymers with circularly polarized luminesce (CPL) remains a challenging task in chemistry and materials science. Herein, we present the single-crystal-to-single-crystal topochemical photopolymerization chiral organic salt to achieve this goal. in-situ reaction 1,4-bis((E)-2-(pyridin-4-yl)vinyl)benzene (1) (+)- or (−)-camphorsulfonic acid (CSA) gives monomer crystal 1[( + )/( − )-CSA]2 showing yellow CPL high luminescent dissymmetry factor |glum| 0.035 emission quantum yield Φ 49.7%. Upon photo-induced [2 2] polymerization, polyionic poly-1[( are obtained. (SCSC) is revealed by situ powder X-ray diffraction, X-ray, optical microscopy, infrared, circular dichroism, spectroscopic analyzes. Interestingly, photopolymer crystals show blue handedness-inverted 0.011 (Φ = 14.2%), respect crystal. Furthermore, patterned circularly-polarized photonic heterojunctions alternate sub-blocks prepared mask-assisted method. Our findings provide vision for fabricating high-performance CPL-active crystalline polymer materials, paving way further development photo-response systems. Single-crystal luminescence interesting but prepare. Here, authors report photopolymerisation form luminescence.

Язык: Английский

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Solvent‐Free Supramolecular Polymerization for Feather‐Like Nanostructured Chiral Fluorescent Polyurethanes with Multimodal Chiroptical Stimuli Responsiveness

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

Abstract Chiral supramolecular polymers with stimuli‐responsive circularly polarized luminescence (CPL) are highly desirable for smart flexible optoelectronic devices, but remain rarely reported. Here, a simple solvent‐free polymerization preparing chiral polyurethanes is presented by in situ induced self‐assembly strategy, using cellulose nanocrystals (CNCs)‐based isocyanate prepolymers and macromolecular polyols as precursors, achieving precise control over polymer chain assembly spot‐like arrangement. More importantly, further incorporating π‐conjugated luminescent dihydroxynaphthalene molecule, CPL‐active polyurethane films feather‐like nanostructures constructed, which promote the ordered arrangement of CNCs‐based segments due to increased spatial resistance. The π─H bond network between CNCs urethane‐linked benzene rings drives self‐assembly, enabling higher‐level amplification enhanced fluorescence. Interestingly, prepared fluorescent display multimodal chiroptical stimuli responsiveness under various stimuli, such temperature, solvent polarity, pH, light, sensitivity network. This work offers new insights into designing significant potentials.

Язык: Английский

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Near‐Infrared Circularly Polarized Electroluminescence with Switchable Handedness in Organic LEDs

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 28, 2025

Abstract In this study, the development of first fully‐organic circularly polarized near‐infrared organic light–emitting diode (CP‐NIR‐OLED) is presented. The devices are made by using a co‐assembled active layer consisting commercially available NIR‐emitting indacenodithienothiophene‐based molecule (ITIC) and chiral inducer. Here, ITIC, which traditionally utilized as non‐fullerene acceptor in photovoltaics for its superior characteristics, demonstrated to act an effective NIR emitter solution‐processed OLEDs. By incorporating additive into layer, emission successfully polarized, achieving CP‐NIR‐OLEDs with dissymmetry values up 0.074 maximum radiance 1.65 Wsr −1 m −2 . Additionally, study shows that manipulating position radiative exciton recombination zone within circular polarization sign can be switched, while maintaining even enhancing device performance. This also exhibit remarkable operational stability, indicating their potential short‐term applications. work provides significant step forward CP‐OLEDs opens new avenues use advanced optoelectronic devices.

Язык: Английский

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Self‐Assembled Chiral Polymers Exhibiting Amplified Circularly Polarized Electroluminescence

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Июль 16, 2024

Circularly polarized electroluminescence (CPEL) is highly promising in realm of 3D display and optical data storage. However, designing a groundbreaking chiral material with high comprehensive CPEL performance remains formidable challenge. In this work, pair polymers self-assembled behavior designed by integrating BN-moiety into polyfluorene backbone, named R-PBN S-PBN, respectively. The show narrowband emission centered at 490 nm full-width half maximum (FWHM) 29 photoluminescence quantum yield (PLQY) 79 %. After thermal annealing treatment, the undergo self-assembly, exhibiting amplified circularly luminescence (CPL) asymmetry factor (|g

Язык: Английский

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Chiral Co‐assembly Based on a Stimuli‐Responsive Polymer towards Amplified Full‐Color Circularly Polarized Luminescence

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Окт. 10, 2024

Abstract Stimuli‐responsive circularly polarized luminescence (CPL) materials have been attaching wide attention in the field of optical information storage and encryption, while still facing challenge realization high dissymmetry factors ( g lum ). This work presents a pair stimuli‐responsive chiral co‐assemblies P7R3 P7S3 by combining polymer PFIQ containing iso ‐quinoline units with inducers. The obtained can reversibly undergo significant modification CPL behavior under trifluoroacetic acid (TFA) fumigation annealing treatment, |g | values exhibiting reversible shift between 0.2 0.3. Moreover, before TFA fumigating effectively induce achiral emitters to generate intense full‐color signals through energy transfer (CPL‐ET), corresponding larger than 0.2. encryption decryption as well multi‐level logic gates application are achieved leveraging activity co‐assembly. provides new perspective for construction luminescent large activation emitters.

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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