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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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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Phosphorescence resonance energy transfer from purely organic supramolecular assembly

Nature Reviews Chemistry, Journal Year: 2023, Volume and Issue: 7(12), P. 854 - 874

Published: Nov. 22, 2023

Language: Английский

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Macroscopic Assembly of Chiral Hydrogen‐bonded Metal‐free Supramolecular Glasses for Enhanced Color‐tunable Ultralong Room Temperature Phosphorescence

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(28)

Published: May 12, 2023

Glassy materials, with desirable mechanical rigidity, shaping ability, high transparency, are attracting great interest in diverse fields. However, optically bulk molecule-based glasses still rare, mainly due to limited monomeric species and harsh preparation conditions. Herein, we report a facile bottom-up solution fabrication process obtain metal-free supramolecular (SMGs) at the macroscopic scale using L-Histidine hexamethylenetetramine as building blocks. The chiral SMGs possess color-tunable ultralong room temperature phosphorescence (decay lifetime up 141.2 ms) circular polarized luminescence (g factor 8.7×10-3 ). strong hydrogen bonds effectively drive formation of SMGs, provide rigid microenvironment boost triplet exciton generation. By virtue excitation- temperature-dependent applications including multicolored displays, visual UV detection, persistently luminescent thermometer demonstrated.

Language: Английский

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Multicolor hyperafterglow from isolated fluorescence chromophores

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Jan. 30, 2023

High-efficiency narrowband emission is always in the central role of organic optoelectronic display applications. However, development afterglow materials with sufficient color purity and high quantum efficiency for hyperafterglow still great challenging due to large structural relaxation severe non-radiative decay triplet excitons. Here we demonstrate a simple yet efficient strategy achieve through sensitizing stabilizing isolated fluorescence chromophores by integrating multi-resonance into host single-component copolymer. Bright multicolor maximum photoluminescent efficiencies 88.9%, minimum full-width at half-maximums (FWHMs) 38 nm ultralong lifetimes 1.64 s under ambient conditions are achieved. With this facilely designed polymer, large-area panel was fabricated. By virtue narrow band luminescent efficiency, presents significant technological advance developing highly extends domain new

Language: Английский

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Macrocyclic Supramolecular Assemblies Based on Hyaluronic Acid and Their Biological Applications

Accounts of Chemical Research, Journal Year: 2022, Volume and Issue: 55(23), P. 3417 - 3429

Published: Nov. 16, 2022

ConspectusHyaluronic acid (HA), which contains multiple carboxyl, hydroxyl, and acetylamino groups is an agent that targets tumors, has drawn great attention in supramolecular diagnosis treatment research. It can not only assemble directly with macrocyclic host–guest complexes through hydrogen bonding electrostatic interactions but also be modified compounds or functional guest molecules by amidation reaction used for further assembly. Macrocycles play a main role the construction of drug carriers, targeted imaging agents, hydrogels, such as cyclodextrins cucurbit[n]urils, encapsulate photosensitizers, drugs, other via interactions. Therefore, formed assemblies respond to various stimuli, enzymes, light, electricity, magnetism controlled delivery, enhance luminescence intensity assembly, improve loading capacity. In addition, nanosupramolecular assembly HA biocompatibility reduce toxicity side effects, cell permeability; thus, extensive application value biomedical This Account mainly focuses on based HA, especially their biological applications progress field, these include (i) guest-modified pyridinium-, adamantane-, peptide-, functional-group-modified along cyclodextrin cucurbit[n]uril assemblies; (ii) macrocycle-modified derivatives guests; (iii) direct between unmodified cyclodextrin- cucurbit[n]uril-based complexes. Particularly, we discussed important HA-based roles included improving water solubility efficacy hydrophobic enhancing luminescent assemblies, inducing room temperature phosphorescence providing energy transfer systems, constructing multi-stimulus-responsive situ formation hydrogels. Additionally, believe obtaining in-depth knowledge encompasses many challenges regarding wound healing, soft materials would certainly contribute rapid development treatment.

Language: Английский

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Polymer–Structure‐Induced Room‐Temperature Phosphorescence of Carbon Dot Materials

Small Structures, Journal Year: 2023, Volume and Issue: 4(5)

Published: Feb. 2, 2023

As emerging carbon‐based nanomaterials, carbon dots (CDs) are widely studied with regard to their luminescent properties. CDs obtained by the bottom‐up method exhibit polymeric characteristics after crosslinking, polymerization, and incomplete carbonization processes, herein referred as carbonized polymer (CPDs). In recent years, large progress has been achieved on room‐temperature phosphorescence (RTP) properties of CPDs. The developments synthesis strategies for RTP CPD materials reviewed. However, less attention devoted influence structures materials. Polymer a common feature extensive key factors facilitating Herein, effects emission self‐protective matrix‐assisted discussed. It is considered that can effectively immobilize subluminophores protect triplet excited states facilitate crosslink‐enhanced (CEE) effect proposed further explain materials, which provide an effective strategy Benefiting from CEE effect, efficient be applications then briefly summarized.

Language: Английский

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Recent progress with the application of organic room-temperature phosphorescent materials

Industrial Chemistry and Materials, Journal Year: 2023, Volume and Issue: 1(4), P. 582 - 594

Published: Jan. 1, 2023

A summary of recent progress with the application organic room-temperature phosphorescent materials in luminescence and display, environmental detection bioimaging.

Language: Английский

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Substrate-Responsive Pillar[5]arene-Based Organic Room-Temperature Phosphorescence

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(20), P. 11130 - 11139

Published: May 8, 2023

Room-temperature phosphorescence (RTP) is a photophysical phenomenon typically associated with long-lived emission that can be detected by the unaided eye. Several natural proteins display RTP, as do certain artificial polymers. In both cases, RTP ascribed to effective intramolecular through-space electronic communication. However, small molecules internal communication enable are relatively rare. Herein, we describe an alkyl halide-responsive system consisting of meta-formylphenyl-bearing pillar[5]arene derivative supports charge transfer (TSCT) within pillararene cavity. Treatment bromoethane, heavy atom-containing guest for host, serves enhance emission. An isomeric para-formylphenyl-bearing proved ineffective in producing effect. Quantum chemical calculations based on single-crystal X-ray diffraction analyses provided insights into structural determinants governing TSCT between 1,4-dimethoxybenzene donor units and formylphenyl groups pillar[5]arene, well energy gaps intersystem crossing channels. We believe present mechanistic analysis provide foundation design new molecule tunable features.

Language: Английский

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Application of room-temperature phosphorescent carbon dots in information encryption and anti-counterfeiting

Nano Today, Journal Year: 2024, Volume and Issue: 55, P. 102200 - 102200

Published: Feb. 13, 2024

Language: Английский

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