“Matching Rule” for Generation, Modulation and Amplification of Circularly Polarized Luminescence

Accounts of Chemical Research, Год журнала: 2024, Номер 57(8), С. 1188 - 1201

Опубликована: Апрель 5, 2024

ConspectusCircularly polarized luminescence (CPL) generated by chiral luminescent systems has sparked enormous attention in multidisciplinary field as it brings infinite potential for applications, such 3D optical displays, biological probes, and chiroptical sensors. Satisfying both the conditions of chirality (including fluorescence or phosphorescence) is a prerequisite constructing CPL materials. In this regard, whether organic, inorganic, hybrid systems, components generally involve effective coupling through covalent noncovalent bonds. For interactions, copolymerization monomers, although bonds provide high stability system, they inevitably tedious preparation procedures that connect together. bonds, take supramolecular assembly an example, elements achiral light-emitting units are transferred intermolecular their advantages include diversity building blocks, stimuli responsiveness brought well amplification signals coassembly. However, system may be poor, performance morphology difficult to predict. Gratifyingly, matching rule do not rely on together with interactions allows effortless construction, modulation, systems.In Account, we overview different strategies based rule, including fluorescence-selective absorption, circularly reflection, energy transfer (CPF-ET). Examples these illustrated focus helical polymers light appealing structures wide uses. instance, can convert racemic into one specific handedness simply overlapping polymer's circular dichroism (CD) spectra luminophore's emission spectra. employing selective reflection certain handedness's light, twisting power (HTP) polymer cholesteric liquid crystals (N*-LCs) gives glum. Additionally, CPF-ET, only spectrum donor absorption (or excitation) acceptor required overlap, no between two required. An outlook materials related which will avail optimization extension intriguing approach concludes Account. We hope Account offer insightful inspiration flourishing progress present exciting opportunities.

Язык: Английский

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Enabling robust blue circularly polarized organic afterglow through self-confining isolated chiral chromophore

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Апрель 9, 2024

Abstract Creating circularly polarized organic afterglow system with elevated triplet energy levels, suppressed non-radiative transitions, and effective chirality, which are three critical prerequisites for achieving blue afterglow, has posed a formidable challenge. Herein, straightforward approach is unveiled to attain materials by covalently self-confining isolated chiral chromophore within polymer matrix. The formation of robust hydrogen bonds the matrix confers distinctly stabilized molecular state chromophores, endowing emission band at 414 nm, lifetime 3.0 s, luminescent dissymmetry factor ~ 10 −2 . Utilizing synergistic chirality transfer, full-color systems endowed doping colorful fluorescent molecules into designed polymers, empowering versatile applications. This work paves way streamlined design materials, expanding horizons various domains.

Язык: Английский

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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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Biomimetic Chiral Nanomaterials with Selective Catalysis Activity

Advanced Science, Год журнала: 2024, Номер 11(23)

Опубликована: Апрель 1, 2024

Abstract Chiral nanomaterials with unique chiral configurations and biocompatible ligands have been booming over the past decade for their interesting chiroptical effect, catalytical activity, related bioapplications. The catalytic activity selectivity of emerged as important topics, that can be potentially controlled optimized by rational biochemical design nanomaterials. In this review, synthesis, composition, performances different biohybrid are discussed. construction multiscale geometries along underlying principles enhancing responses highlighted. Various approaches to regulate biocatalysis also summarized. Furthermore, attention is paid specific ligands, materials compositions, structure characteristics, so on introducing selective activities representative nanomaterials, emphasis substrates including small molecules, biological macromolecule, in‐site catalysis in living systems. Promising progress has emphasized featuring structural versatility improved gave rise unprecedented chances utilize light biocatalytic applications. summary, challenges, future trends, prospects associated comprehensively proposed.

Язык: Английский

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Supramolecular Polymer Frameworks with Controlled and Uniform Pore Apertures

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

Опубликована: Июнь 27, 2024

Porous frameworks with controlled pore structure and tunable aperture are greatly demanded. However, precise synthesis of this kind materials is a formidable challenge. Herein, we report the fabrication two-dimensional (2D) supramolecular polymer using precisely synthesized rod-like helical polyisocyanide as link. Four three-arm star-shaped polyisocyanides degree polymerization 10, 20, 30 40, having 2-ureido-4[1H]-pyrimidinone (UPy) terminals were synthesized. 2D-Crystalline apertures 5.3, 10.1, 13.9, 19.1 nm respectively obtained through intermolecular hydrogen bonding interaction between terminal Upy units. The dependent on length backbone. Thus, well-defined uniform hexagonal pores obtained, proved by small-angle X-ray scattering (synchrotron radiation facility), atomic force microscopy, Brunauer-Emmett-Teller analyses. large used to purify nanomaterials immobilize biomacromolecules. For instance, membranes could size-fractionation silver nanoparticles into very low dispersity. facilitated inclusion myoglobin enhanced stability catalytic activity.

Язык: Английский

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One-Step/One-Pot Crystallization-Driven Co-Self-Assembly Strategy toward Controlled Preparation of π-Conjugated-Polymer-Containing Three-Dimensional Nanostructures

Macromolecules, Год журнала: 2025, Номер unknown

Опубликована: Янв. 10, 2025

Three-dimensional (3-D) π-conjugated-polymer-containing nanostructures of well-controlled composition/dimension exhibit promising applications in fields from nanomedicine to microelectronics. However, it remains a great challenge easily and efficiently prepare hierarchical 3-D controlled manner. In this work, we develop one-step/one-pot strategy generate flower-like containing core numerous uniform nanofibers protruding the central by crystallization-driven co-self-assembly OPE9-b-P2VP56 [OPE = oligo(p-phenylene ethynylene); P2VP poly(2-vinylpyridine); subscript represents degree polymerization] poly(styrene sulfonic acid) (PSS) with direct heating–cooling protocol. It is disclosed that hydrogen bonding interactions between pyridyls −SO3H units PSS not only accelerated aggregation unimers but also led intermicellar initially formed micelles driven solvophobic effect complexes P2VP/PSS domains upon cooling. Subsequently, continued deposit exposed ends give nanostructures. By variation content mass ratio OPE9-b-P2VP56, length number can be regulated. More importantly, remained active toward unimer deposition for further micellar elongation afford segmented diblock nanofibers. addition, surface coated Ag nanoparticles hybrid taking advantage coordinating capacity chains. Given excellent applicability CDSA on diverse π-conjugated polymers, work opens new avenue create π-conjugated-polymer-based way.

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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Efficient and Selective Removal of Iodine in Aqueous Media Using Morphology-Controlled Porous Hyper-Cross-Linked Polymers

ACS Applied Polymer Materials, Год журнала: 2025, Номер 7(3), С. 1639 - 1650

Опубликована: Янв. 30, 2025

Hyper-cross-linked polymers (HCPs) have demonstrated great potential for capture, catalysis, drug delivery, and energy storage attracted extensive research interest. Nevertheless, tuning their nanoscale morphology remains a challenge. Herein, we constructed series of HCPs (HCP[HaPb]) with various morphologies (nanospheres, nanorod-like, flower-like nanostructures) by controlling the molar ratios monomers hexakis(benzylthio)benzene quality. In addition, HCP[H200P3] rich nitrogen sulfur atoms showed fast adsorption rate high capacity I3– in aqueous media. The reached 98% within 5 min at liquid/solid ratio 1 mL mg–1, saturated 1.388 g g–1 was obtained 30 mg–1. Additionally, flow-through experiments revealed that an impressive removal flow 1.0 min–1. More importantly, could selectively capture presence competing anions. This work proved adsorbent highly selective has good prospects practical application I3–.

Язык: Английский

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Living Direct Arylation Polymerization via C–H Activation for the Precision Synthesis of Polythiophenes and Their Block Copolymers

Macromolecules, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Язык: Английский

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Polymer Network Film with Double Reflection Bands Prepared Using a Thermochromic Cholesteric Liquid Crystal Mixture

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(14), С. 18001 - 18007

Опубликована: Март 26, 2024

Cholesteric liquid crystal polymer network (CLCN) films with a single reflection band have found applications for decoration and anticounterfeiting. The CLCN double bands were more suitable these applications. Herein, they prepared by using thermochromic cholesteric crystals (CLCs) through two-step photopolymerization approach. At the first step, due to oxygen inhibition, CLC monomers near substrate surface polymerized at certain temperature. second those air another wavelengths of two film dominated polymerization temperatures. Based on this approach, patterns composite colors prepared, which suitably applied decoration. Moreover, double-layered broad was that could potentially be displays.

Язык: Английский

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