Nonconventional luminophores: characteristics, advancements and perspectives

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(22), P. 12616 - 12655

Published: Jan. 1, 2021

Mechanisms, recent advancements and perspectives concerning nonconventional luminophores free of classic conjugates but with intrinsic photoluminescence are discussed.

Language: Английский

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Ultralow‐loss Optical Waveguides through Balancing Deep‐Blue TADF and Orange Room Temperature Phosphorescence in Hybrid Antimony Halide Microstructures

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(39)

Published: Aug. 14, 2023

Harnessing the potential of thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) is crucial for developing light-emitting diodes (LEDs), lasers, sensors, many others. However, effective strategies in this domain are still relatively scarce. This study presents a new approach to achieving highly efficient deep-blue TADF (with PLQY 25 %) low-energy orange RTP 90 through fabrication lead-free hybrid halides. class monomeric dimeric 0D antimony halides can be facilely synthesized using bottom-up solution process, requiring only few seconds minutes, which offer exceptional stability nontoxicity. By leveraging adaptable molecular arrangement crystal packing modes, demonstrate ability self-assemble into regular 1D microrod 2D microplate morphologies. self-assembly facilitated by multiple non-covalent interactions between inorganic cores organic shells. Notably, these microstructures exhibit outstanding polarized luminescence function as low-dimensional optical waveguides with remarkably low optical-loss coefficients. Therefore, work not pioneering demonstration halides, but also introduces micro/nanostructures that hold promising applications white LEDs photonic systems.

Language: Английский

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Pt(II)/Pd(II)‐Based Metallosupramolecular Architectures as Light Harvesting Systems and their Applications

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(18)

Published: Feb. 21, 2024

The development of artificial light-harvesting systems mimicking the natural photosynthesis method is an ever-growing field research. Numerous such as polymers, metal complexes, POFs, COFs, supramolecular frameworks etc. have been fabricated to accomplish more efficient energy transfer and storage. Among them, coordination complexes (SCCs) formed by non-covalent metal-ligand interaction, shown capacity not only undergo single multistep migration but also utilize harvested for a wide variety applications photocatalysis, tunable emissive systems, encrypted anti-counterfeiting materials, white light emitters This review sheds on behavior both 2D metallacycles 3D metallacages where design ingenuity has executed afford harvesting donor ligands well acceptors.

Language: Английский

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A Flexible Organic Single Crystal with Plastic‐Twisting and Elastic‐Bending Capabilities and Polarization‐Rotation Function

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 59(31), P. 12944 - 12950

Published: April 25, 2020

Flexible organic single crystals capable of plastic or elastic deformations have a variety potential applications. Although the integration plasticity and elasticity in crystal is theoretically possible it may cause rich complex which are highly demanded for applications, hard to realize practice. Here, we show that through utilizing different modes external forces influencing molecular packing crystallographic directions, helical twisting bending can both be achieved crystal, they even realized simultaneously. Detailed analyses contrast experiments disclose mechanisms behind these two kinds distinct their mutual compatibility. Based on plastically twistable nature new application field flexible crystals, namely polarization rotators, successfully opened up.

Language: Английский

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Ultra-fast single-crystal polymerization of large-sized covalent organic frameworks

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Aug. 23, 2021

In principle, polymerization tends to produce amorphous or poorly crystalline materials. Efficiently producing high-quality single crystals by in solvent remains as an unsolved issue chemistry, especially for covalent organic frameworks (COFs) with highly complex structures. To μm-sized crystals, the growth time is prolonged >15 days, far away from requirements practical applications. Here, we find supercritical CO2 (sc-CO2) accelerates single-crystal 10,000,000 folds, and produces two-dimensional (2D) COF size up 0.2 mm within 2~5 min. Although it fastest polymerization, sc-CO2 leads not only largest crystal of 2D COFs, but also higher quality improved photoconductivity performance. This work overcomes traditional concept on low efficiency holds great promise future applications owing its efficiency, industrial compatibility, environmental friendliness universality different structures linkage bonds.

Language: Английский

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Controlling Metallophilic Interactions in Chiral Gold(I) Double Salts towards Excitation Wavelength‐Tunable Circularly Polarized Luminescence

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 59(17), P. 6915 - 6922

Published: Jan. 28, 2020

Abstract Materials exhibiting excitation wavelength‐dependent photoluminescence (Ex‐De PL) in the visible region have potential applications bioimaging, optoelectronics and anti‐counterfeiting. Two multifunctional, chiral [Au(NHC) 2 ][Au(CN) ] (NHC=(4R,5R)/(4S,5S)‐1,3‐dimethyl‐4,5‐diphenyl‐4,5‐dihydro‐imidazolin‐2‐ylidene) complex double salts display Ex‐De circularly polarized luminescence (CPL) doped polymer films ground powder. Emission maxima can be dynamically tuned from 440 to 530 nm by changing wavelength. The continuously tunable is proposed originate multiple emissive excited states as a result of existence varied Au I ⋅⋅⋅Au distances state. steric properties NHC ligand are crucial tuning distances. An anti‐counterfeiting application using these two demonstrated.

Language: Английский

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Phosphorescent Cyclometalated Platinum(II) Enantiomers with Circularly Polarized Luminescence Properties and Their Assembly Behaviors

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(51), P. 21676 - 21684

Published: Dec. 15, 2021

Platinum(II) complexes as supramolecular luminescent materials have received considerable attention due to their unique planar structures and fascinating photophysical properties. However, the molecular design of platinum(II) with impressive circularly polarized luminescence properties still remains challenging rarely explored. Herein, we reported a series cyclometalated benzaldehyde its derived imine-containing alkynyl ligands investigate phosphorescent, chiroptical, self-assembly behaviors. An isodesmic growth mechanism is found for temperature-dependent process. The chiral sense enantiomers can be transferred from dipyridylbenzene N^C^N chromophore further amplified through assembly via intermolecular noncovalent interactions. Notably, distinctive phosphorescent nanostructured morphologies been 4R 4S. Their intriguing self-assembled nanostructures phosphorescence behaviors are supported by crystal structure determination, 1H NMR, emission, UV-vis absorption spectroscopy, scanning electron microscopy, X-ray powder diffraction studies.

Language: Английский

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Tetraphenylethene-Based Supramolecular Coordination Frameworks with Aggregation-Induced Emission for an Artificial Light-Harvesting System

ACS Applied Materials & Interfaces, Journal Year: 2020, Volume and Issue: 12(20), P. 22630 - 22639

Published: April 24, 2020

Supramolecular coordination is an efficient strategy to construct supramolecular frameworks with predesigned structures, assembled shapes, and specific function. In this work, we report the synthesis, structural characterization, photophysical property of two tetraphenylethene-based 1a 1b formed from 1,1,2,2-tetrakis(4-(pyridin-4-yl)phenyl)ethene (2a) or 1,1,2,2-tetrakis(4-((E)-2-(pyridin-4-yl)vinyl)phenyl)ethene (2b) a linear difunctional platinum(II) ligand (3a) via coordination-driven self-assembly. Controlled by angularity geometry tetraphenylethene (with 60° 120°) Pt(II) linker 180°), these possess well-defined two-dimensional (2D) rhombic network-type topology good periodicity porosity. Given aggregation-induced emission (AIE) units porosity frameworks, have been successfully used as fluorescent platforms energy donors fabricate artificial light-harvesting materials acceptors (Nile Red Sulforhodamine 101) noncovalent interactions in aqueous solution. Furthermore, applied for promoting cancer cell imaging full shift channels blue/green red channel. Thus, study provides effective approach functional developing more materials.

Language: Английский

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Functional flexible molecular crystals: intrinsic and mechanoresponsive properties

CrystEngComm, Journal Year: 2021, Volume and Issue: 23(34), P. 5686 - 5696

Published: Jan. 1, 2021

Flexible molecular crystals have attracted much attention to unique optoelectronic applications and stimuli-responsive chemistry, resulting in various functional for controlling photons, phonons, electrons, magnons.

Language: Английский

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Novel Strategy of Constructing Artificial Light-Harvesting System with Two-Step Sequential Energy Transfer for Efficient Photocatalysis in Water

ACS Applied Materials & Interfaces, Journal Year: 2022, Volume and Issue: 14(40), P. 45734 - 45741

Published: Sept. 27, 2022

An efficient artificial light-harvesting system with a two-step sequential energy transfer was fabricated in the aqueous solution based on host-guest interactions between cyano-substituted p-phenylenevinylene derivative (PPTA) and water-soluble pillar[5]arene (WP5). PPTA-WP5 complex could self-assemble into nanoparticles, two fluorescent dyes eosin Y (EY) Nile Red (NIR) are employed as acceptors to realize transfer. The PPTA-WP5-EY-NIR achieve process from EY then NIR (67% for first step 66% second step). Moreover, make full use of harvested energy, hydrophobic microenvironment assembled nanoparticles is used promote aerobic cross-dehydrogenative coupling (CDC) reaction medium 88% yield after 12 h irradiation. To our knowledge, this example LHS catalyze CDC medium. This work directly mimics function photosynthesis nature converting solar chemical solution.

Language: Английский

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