Recent advances in the design of afterglow materials: mechanisms, structural regulation strategies and applications

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(22), P. 8005 - 8058

Published: Jan. 1, 2023

Afterglow materials have attracted widespread attention owing to their distinctive and long-lived optical emission properties which create exciting opportunities in various fields.

Language: Английский

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Carbon dots: mysterious past, vibrant present, and expansive future

Trends in Chemistry, Journal Year: 2022, Volume and Issue: 5(1), P. 76 - 87

Published: Nov. 10, 2022

Language: Английский

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Zero-Dimensional Carbon Nanomaterials for Fluorescent Sensing and Imaging

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(18), P. 11047 - 11136

Published: Sept. 7, 2023

Advances in nanotechnology and nanomaterials have attracted considerable interest play key roles scientific innovations diverse fields. In particular, increased attention has been focused on carbon-based exhibiting extended structures unique properties. Among these materials, zero-dimensional structures, including fullerenes, carbon nano-onions, nanodiamonds, dots, possess excellent bioaffinities superior fluorescence properties that make suitable for application to environmental biological sensing, imaging, therapeutics. This review provides a systematic overview of the classification structural properties, design principles preparation methods, optical sensing applications nanomaterials. Recent interesting breakthroughs sensitive selective imaging heavy metal pollutants, hazardous substances, bioactive molecules as well information encryption, super-resolution photoacoustic phototherapy nanomedicine delivery are main focus this review. Finally, future challenges prospects materials highlighted envisaged. presents comprehensive basis directions designing, developing, applying fascinating fluorescent sensors fabricated based specific requirements numerous research

Language: Английский

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A Molecular Engineering Strategy for Achieving Blue Phosphorescent Carbon Dots with Outstanding Efficiency above 50%

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(6)

Published: Nov. 22, 2022

Highly efficient emission has been a long-lasting pursuit for carbon dots (CDs) owing to their enormous potential in optoelectronic applications. Nevertheless, room-temperature phosphorescence (RTP) performance still largely lags behind outstanding fluorescence emission, especially the blue spectral region. Herein, high-efficiency RTP CDs have designed and constructed via simple molecular engineering strategy, enabling with an unprecedented quantum efficiency of 50.17% long lifetime 2.03 s. This treating route facilitates formation high-density (n, π*) configurations CD π-π conjugate system through introduction abundant functional groups, which can evoke strong spin-orbit coupling further promote intersystem crossing from singlet triplet excited states radiative recombination ground state. With phosphorescent as donors, green, red, white afterglow composites are successfully fabricated effective Förster resonance energy transfer. Importantly, color temperature be widely facilely tuned cool pure warm white. Moreover, advanced information encryption, light illumination, afterglow/dynamic visual display demonstrated when using these multicolor-emitting CD-based systems.

Language: Английский

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Solid‐state Fluorescence from Carbon Dots Widely Tunable from Blue to Deep Red through Surface Ligand Modulation

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(12)

Published: Dec. 20, 2022

Carbon dots (CDs) find widespread attention due to their remarkable fluorescent and electronic properties. However, aggregation-caused quenching currently limits the application of CDs in colored displays. The construction with color-tunable solid-state fluorescence (SSF) is rarely reported, since preparation SSF technically challenging. Herein, through surface ligand modulation, an emission-color span almost 300 nm (from blue deep red) were obtained. In-depth structure-property studies reveal that intra- inter-molecular hydrogen-bonding inside provokes emission properties aggregated state. Photodynamic characterizations demonstrate wavelengths can be switched smoothly by deliberately altering conjugation ability between substituent ligands core. Three-dimensional printing patterning used create a range emissive objects, demonstrating commercial potential for use optical lamps.

Language: Английский

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Thermally Enhanced and Long Lifetime Red TADF Carbon Dots via Multi‐Confinement and Phosphorescence Assisted Energy Transfer

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(20)

Published: March 9, 2023

Thermally activated delayed fluorescence (TADF) materials, which can harvest both singlet and triplet excitons for high-efficiency emission, have attracted widespread concern their enormous applications. Nevertheless, luminescence thermal quenching severely limits the efficiency operating stability in TADF materials devices at high temperature. Herein, a surface engineering strategy is adopted to obtain unique carbon dots (CDs)-based thermally enhanced with ≈250% enhancement from 273 343 K via incorporating seed CDs into ionic crystal network. The rigid network simultaneously boost reverse intersystem crossing process enhancing spin-orbit coupling between states suppressing non-radiative transition rate, contributing character. Benefiting efficient energy transfer of phosphorescence center CDs, emission ≈600 nm displays long lifetime up 109.6 ms, outperforming other red organic materials. Thanks variable decay rates centers, time temperature-dependent color has been first realized CDs-based time-/temperature-dependent one material system offer new opportunities information protection processing.

Language: Английский

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Evolution and fabrication of carbon dot-based room temperature phosphorescence materials

Chemical Science, Journal Year: 2023, Volume and Issue: 14(14), P. 3705 - 3729

Published: Jan. 1, 2023

Carbon dot-based room temperature phosphorescence materials are reported, mainly focusing on the outstanding contributions over years, emission, lifetime, preparation and application.

Language: Английский

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Room Temperature Phosphorescence Carbon Dots: Preparations, Regulations, and Applications

Small, Journal Year: 2023, Volume and Issue: 19(33)

Published: April 22, 2023

Abstract Room temperature phosphorescence (RTP) materials have drawn considerable attention by virtue of their outstanding features. Compared with organometallic complexes and pure organic compounds, carbon dots (CDs) emerged as a new type RTP materials, which show great advantages, such moderate reaction condition, low toxicity, cost, tunable optical properties. In this review, the important progress made in CDs is summarized, an emphasis on latest developments. The synthetic strategies will be comprehensively followed detailed introduction performance regulation potential applications anti‐counterfeiting, information encryption, sensing, light‐emitting diodes, biomedicine. Finally, remaining major challenges for are discussed opportunities future proposed.

Language: Английский

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Long‐Lived Dynamic Room Temperature Phosphorescence from Carbon Dots Based Materials

Small, Journal Year: 2023, Volume and Issue: 19(31)

Published: Jan. 6, 2023

Abstract As a type of room temperature phosphorescence (RTP) material, carbon dots (CDs) always show short lifetime and low efficiency. To counter these disadvantages, several strategies, such as embedding in rigid matrix, introducing heteroatom, crosslink‐enhanced emission, etc., are well developed. Consequently, lots CDs‐based RTP materials obtained. Doping CDs into various matrix is the dominant method for preparation long‐lived so far. The desired CDs@matrix composites display outstanding performances. Meanwhile, matrix‐free carbonized polymer dots‐based also widely Amounts possessing ultra‐long lived, multiple colored, dynamic emission successfully Herein, recent progress achieved corresponding efficient strategies mechanisms summarized reviewed detail. Due to possess excellent chemical stability, photostability biological toxicity, they exhibit great application potential fields anti‐counterfeiting, data encryption, monitoring. introduced this review. promising functional development long wavelength emitting with still challengeable, especially red near‐infrared materials.

Language: Английский

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Innovations in the Solid‐State Fluorescence of Carbon Dots: Strategies, Optical Manipulations, and Applications

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(41)

Published: June 13, 2023

Abstract Carbon dots (CDs)—carbon nanoparticles smaller than 10 nm—have attracted widespread attention owing to their excellent optical properties. However, high‐performing CDs often suffer from severe aggregation‐induced quenching in the solid state, which limits commercial applicability. Therefore, CD materials with efficient solid‐state luminescence are sought. As research on structure and photoluminescence mechanisms of has intensified recent years, strategies construct fluorescent tune emissions have broadened. This article reviews advances for attaining fluorescence CDs, describes specific ways properties this fluorescence, introduces latest applications resulting optoelectronics, biology, sensing, finally considers prospects future application current challenges facing development CDs.

Language: Английский

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