A Photopatternable Conjugated Polymer with Thermal‐Annealing‐Promoted Interchain Stacking for Highly Stable Anti‐Counterfeiting Materials

Advanced Materials, Год журнала: 2023, Номер 35(36)

Опубликована: Май 31, 2023

Photoresponsive polymers can be conveniently used to fabricate anti-counterfeiting materials through photopatterning. However, an unsolved problem is that ambient light and heat damage patterns on photoresponsive polymers. Herein, photo- thermostable are developed by photopatterning thermal annealing of a conjugated polymer (MC-Azo). MC-Azo contains alternating azobenzene fluorene units in the backbone. To prepare material, film irradiated with polarized blue photomask, then thermally annealed under pressure photonic stamp. This strategy generates highly secure material dual patterns, which stable sunlight over 200 °C. A key for stability promotes interchain stacking, converts photostable material. Another structure endows desirable properties. study shows design photopatternable thermal-annealing-promoted stacking provides new development materials.

Язык: Английский

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Functional Polymeric Micromaterials Based on Aggregation‐Induced Emission Luminogens

Advanced Functional Materials, Год журнала: 2023, Номер 33(51)

Опубликована: Сен. 8, 2023

Abstract Aggregate materials have attracted tremendous attention because of their modified or totally different properties compared with molecular counterparts. Among various mesoscopic aggregate materials, polymeric micromaterials possess the advantages diverse structures and flexible manufacturing, enabling them to serve as excellent carriers for aggregation‐induced emission luminogens (AIEgens) good platforms research science. In recent years, constructed from AIEgens witnessed rapid development show great application potential in fields, such environmental sensing, multicolor displaying, energy conversion. This review summarizes progress on design, preparation, structure, applications AIEgen‐based micromaterials. According structure features, are divided into three categories, including microsphere, microfiber, other‐shaped microparticles. The most representative examples each category highlighted by focusing subdivision solid porous microcapsule, microfiber doped‐ coated AIEgens, core–shell microfiber. Finally, challenges prospects this field also discussed. It is hoped that can provide readers an overall view boost further research.

Язык: Английский

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Main-Chain Cationic Polyelectrolytes: Design, Synthesis, and Applications

Langmuir, Год журнала: 2024, Номер 40(5), С. 2417 - 2438

Опубликована: Янв. 22, 2024

Polyelectrolytes have attracted a lot of attention spanning across disciplines, including polymer chemistry, materials chemical biology, engineering, as well device physics, result their widespread applications in sensing, biomedicine, food industry, wastewater treatment, optoelectronic devices, and renewable energy. In this review, we focus on the crucial synthetic strategies structurally different classes main-chain cationic polyelectrolytes. As presence charged moieties main polymeric backbone, solubility photophysical properties can be easily tuned. Main-chain polyelectrolytes provide various unique characteristics, aqueous organic solvents, easy processability, ease film formation, ionic interaction, main-chain-directed charge transport, high conductivity, aggregation. These make polyelectrolyte potential candidate for numerous ranging from chemo- biosensing, antibacterial activity, optoelectronics, electrocatalysis, water splitting, ion conduction, to dye-sensitized solar cells.

Язык: Английский

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Chameleon-like Photoluminescent Janus Nanoparticles as Full-Color Multicomponent Organic Nanoinks: Combination of Förster Resonance Energy Transfer and Photochromism for Encryption and Anticounterfeiting with Multilevel Authentication

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер unknown

Опубликована: Ноя. 30, 2023

Increasing the security by multilevel authentication mechanism was most significant challenge in recent years for development of anticounterfeiting inks based on photoluminescent nanomaterials. For this purpose, greatest strategy is use multicomponent organic materials and a combination Förster resonance energy transfer (FRET) with intelligent behavior photochromic compounds like spiropyran. Here, hydroxyl-functionalized polymer nanoparticles were synthesized emulsion copolymerization methyl methacrylate (MMA) 2-hydroxyethyl (HEMA) different compositions (0-30 wt % HEMA). Results illustrated that size changed from 64 to 204 nm, morphology evolution spherical Janus shape observed increasing concentration HEMA. Photoluminescent red, green, blue (RGB) fluorescence emissions prepared modification containing 15 HEMA spiropyran, fluorescein, coumarin, respectively. To develop dual-color multicolor display static dynamic emission, RGB latex samples mixed together ratios printed cellulosic paper. emission developed can be photoswitched between statuses, including white blue, green red/orange, purple pink, utilizing FRET phenomenon, photochromism, both phenomena. Samples spiropyran displayed color changes orange, pink depending composition. Hence, used printing tags also painting some hand-drawn artworks, which obtained results indicating high printability, maximum intensity, resolution, fast responsivity upon UV-light irradiations 254 nm (for mode) 365 mode). In addition, under irradiation change observed, resulting inks. Actually, are efficient candidates developing new category chameleon-like high-security have tunable optical properties complex mechanisms.

Язык: Английский

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Efficient Conversion of Inert Nitriles to Multifunctional Poly(5-amino-1,2,3-triazole)s via Regioselective Click Polymerization with Azide Monomers under Ambient Conditions

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(10), С. 6652 - 6664

Опубликована: Фев. 29, 2024

Nitrile compounds are abundant, stable, cheap, and readily available natural chemical industrial sources. However, the efficient conversion of nitrile monomers to functional polymers is mostly limited due their inert reactivity, developing polymerizations based on under very mild conditions still a big challenge. In this work, facile powerful base-catalyzed acetonitrile-azide click polymerization was successfully established ambient conditions. This also enjoys merits short reaction time (15 min), 100% atom economy, transition-metal-free catalyst system, regioselectivity. A series poly(5-amino-1,2,3-triazole)s (PATAs) with high weight-average molecular weights (Mw, up 204,000) were produced in excellent yields (up 99%). The PATAs containing tetraphenylethene (TPE) moieties exhibit unique aggregation-induced emission (AIE) characteristics, which could be used sensitively detect Fe(III) ions low limit detection (1.205 × 10–7 M) specifically image lysosomes living cells. Notably, facilely post-modified primary amino groups polymer chains even through one-pot tandem reaction. Thus, work not only establishes new convert stable nitriles but generates versatile properties for diverse applications.

Язык: Английский

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Construction of Rings via Metal‐Catalyzed C−H Annulation with Unsymmetrical Internal Alkynes: Selectivity and Applications

ChemCatChem, Год журнала: 2023, Номер 15(21)

Опубликована: Авг. 19, 2023

Abstract Selective and concise construction of ring systems that are ubiquitous skeletons across chemistry, drugs materials, is indispensable for human life. Of note, directed C−H annulation with alkynes the expedient delivery holds great importance, featuring step‐ atom‐economy, mild conditions, broad substrate scope. However, regioselectivity issues remained when using unsymmetrical annulation. Herein, we summarized recent achievements towards solving this problem by developing directing groups, metal catalysts, versatile traceless functionality ensure overall regioselectivity, enantioselectivity, efficiency, synthetic application. We hope concept will promote further development precise functional molecules alkynes.

Язык: Английский

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Ethynyl-Directed Dual C(sp³)–H Activation Polymerization to Construct Regio- and Stereoregular C(sp³)–C(sp³) Bond Polymers

Macromolecules, Год журнала: 2023, Номер 57(1), С. 122 - 131

Опубликована: Дек. 20, 2023

The establishment of facile, efficient, and precise synthetic approaches to selectively convert stable C–H bonds functional polymers has great significance in both chemistry material science especially by C(sp3)–H activation. Here, an efficient dual activation polymerization alkynes activated methylenes catalyzed Pd(PPh3)4/benzoic acid was successfully established with a 100% atom economy excellent regio- stereoselectivity. A series high-weight-average molecular-weight (Mw approximately 66,500) poly(aryl butene)s (PABs) sole E configuration were generated remarkable yields (approximately 99%). PABs exhibit good thermal stability, solubility, film-forming ability. In addition, the thin PAB films display high refractive indices (RI) up 1.7126 at 589 nm. Because this strong group tolerance, luminophores can be readily constructed into main chain empower multicolored luminescence various states. Notably, containing tetraphenylethene (TPE) moiety feature unique aggregation-induced emission (AIE) peculiarities, which could specifically sensitively detect Fe(III) ions low limit detection (LOD) 1.585 × 10–6 M.

Язык: Английский

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Targeted and Long-Term Fluorescence Imaging of Plant Cytomembranes Using Main-Chain Charged Polyelectrolytes with Aggregation-Induced Emission

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер unknown

Опубликована: Фев. 13, 2024

Fluorescent polyelectrolytes have attracted tremendous attention due to their unique properties and wide applications. However, current research objects of fluorescent mainly focus on side-chain charged polyelectrolytes, the applications in plant cytomembrane imaging with long time high specificity still remain challenging. Herein, long-time targeted fluorescence cytomembranes was achieved for first using main-chain (MCCPs) aggregation-induced emission (AIE). A series MCCPs were designed synthesized, among which red-emissive AIE-active MCCP a triphenylamine linker cyano group around cationic ring-fused heterocyclic core showed best performance cells. Unlike other its neutral form polymer, this cyano-substituted conjugated polyelectrolyte can specifically target cells within short staining many advantages, including wash-free staining, photostability integrity, excellent durability (at least 12 h), low biotoxicity. In addition onion epidermal cells, AIE probe also shows good capabilities kinds such as Glycine max Vigna radiata. Such an MCCP-based system provides effective design strategy develop probes long-term ability toward plasma membranes.

Язык: Английский

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Asymmetric non-fused ring acceptor with low energy loss for efficient organic solar cells

Chemical Engineering Journal, Год журнала: 2024, Номер 491, С. 151806 - 151806

Опубликована: Апрель 30, 2024

Язык: Английский

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Cobalt-Catalyzed Cascade C–H Activation/Annulation Polymerizations toward Diversified and Multifunctional Sulfur-Containing Fused Heterocyclic Polymers

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(25), С. 17270 - 17284

Опубликована: Июнь 12, 2024

Transition-metal-catalyzed C–H activation has greatly benefited the synthesis and development of functional polymer materials, construction multifunctional fused (hetero)cyclic polymers via novel activation-based polyannulations emerged as a charming but challenging area in recent years. Herein, we report first cobalt(III)-catalyzed cascade activation/annulation polymerization (CAAP) approach that can efficiently transform readily available aryl thioamides internal diynes into sulfur-containing heterocyclic (SFH) polymers. Within merely 3 h, series SFH bearing complex multisubstituted S,N-doped polycyclic units are facilely produced with high molecular weights (absolute Mn up to 220400) excellent yields (up 99%), which hard achieve by traditional methods. The intermediate-terminated be used reactive macromonomer controllably extend or modify main chains. structural diversity further enriched through facile S-oxidation N-methylation reactions Benefiting from unique structures, obtained exhibit solution processability, thermal morphological stability, efficient tunable aggregate-state fluorescence, stimuli-responsive properties, UV-modulatable refractive indices 1.8464 at 632.8 nm. These properties allow potentially applied diverse fields, including metal ion detection, photodynamic killing cancer cells, fluorescent photopatterning, gradient-index optical materials.

Язык: Английский

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