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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Achieving Color‐Tunable and Time‐Dependent Organic Long Persistent Luminescence via Phosphorescence Energy Transfer for Advanced Anti‐Counterfeiting

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(1)

Published: Oct. 30, 2022

Abstract Organic ultralong room‐temperature phosphorescence (RTP) materials have promising applications in anti‐counterfeiting. To improve the encryption level, exploration of organic with tunable solid‐state long persistent luminescence is urgent need. Herein, a series RTP polymeric systems are prepared by doping versatile indolocarbazole isomers into poly(vinyl alcohol) (PVA) matrix. Notably, film 11,12‐ICz@PVA exhibits excellent property an lifetime 2.04 s and high quantum yield 44.1%. Theoretical calculations reveal that this can be attributed to strong electrostatic attraction resulting from synergistic double hydrogen‐bond between isomer 11,12‐ICz PVA More impressively, color‐tunable time‐dependent successfully achieved through efficient energy transfer blue emissions commercially available fluorescent dyes emission colors ranging green red doped Besides, diversified patterns fabricated demonstrate these water‐soluble advanced anti‐counterfeiting technology.

Language: Английский

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Efficient room-temperature phosphorescence of covalent organic frameworks through covalent halogen doping

Nature Chemistry, Journal Year: 2022, Volume and Issue: 15(1), P. 83 - 90

Published: Oct. 27, 2022

Language: Английский

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Efficient and Color‐Tunable Dual‐Mode Afterglow from Large‐Area and Flexible Polymer‐Based Transparent Films for Anti‐Counterfeiting and Information Encryption

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(23)

Published: March 22, 2022

It remains a great challenge to develop polymer-based materials with efficient and color-tunable organic afterglow. Two indolocarbazole derivatives IaCzA IbCzA have been synthesized doped into poly(vinyl alcohol) (PVA) matrices. is found that the resulting films can produce unique dual-mode afterglow, which composed of persistent thermally activated delayed fluorescence ultralong phosphorescence. Besides, IbCzA-doped PVA film exhibits intense blue afterglow Φafterglow τafterglow up 19.8 % 1.81 s, respectively, representing state-of-the-art performance. Moreover, our reported has high flexibility, excellent transparency, large-area producibility; color be linearly tuned by temperature. Inspired these distinctive properties, was employed as temperature-sensitive security ink for anti-counterfeiting information encryption.

Language: Английский

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Resonance-Induced Stimuli-Responsive Capacity Modulation of Organic Ultralong Room Temperature Phosphorescence

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(15), P. 6946 - 6953

Published: March 22, 2022

Organic ultralong room temperature phosphorescence (OURTP) materials having stimuli-responsive attributes have attracted great attention due to their potential in a wide variety of advanced applications. It is fundamental importance but challengeable develop OURTP materials, especially such with modulated optoelectronic properties controlled manner probably the lack an authentic construction approach. Here, we propose effective strategy for controllably regulated by engineering resonance linkage between flexible chain and phosphor units. A quantitative parameter demonstrate capacity also established responsivity rate constant. The designed efficient photoactivated lifetimes up 724 ms tunable constants ranging from 0.132 0.308 min–1 upon continuous UV irradiation. Moreover, applications been illustrated rewritable paper snapshot Morse code multiple information encryption. Our works, which enable accomplishment capable on-demand manipulated optical properties, viable design explore smart giving deep insights into dynamically process.

Language: Английский

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Poly(arylene piperidine) Quaternary Ammonium Salts Promoting Stable Long‐Lived Room‐Temperature Phosphorescence in Aqueous Environment

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(34)

Published: June 22, 2022

Room-temperature phosphorescence (RTP) materials have garnered considerable research attention owing to their excellent luminescence properties and potential application prospects in anti-counterfeiting, information storage, optoelectronics. However, several RTP systems are extremely sensitive humidity, consequently, the realization of long-lived water remains a formidable challenge. Herein, feasible effective strategy is presented achieve polymeric systems, even an aqueous environment, through doping synthesized phosphor PBHDB into poly(methyl methacrylate) (PMMA) matrix. Compared precursor polymer PBN organic molecule HDBP, more rigid microenvironment electrostatic interaction formed between PMMA matrix PBHDB, which effectively reduce nonradiative decay rate triplet excitons dramatically increase intensity. Specifically, lifetime PBHDB@PMMA film (1258.62 ms) much longer than those PBN@PMMA (674.20 HDBP@PMMA (1.06 ms). Most importantly, bright-green afterglow can be observed after soaking for month. The resistance reversible response endow these with promising dynamic encryption water.

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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Accessing Excitation‐ and Time‐Responsive Afterglows from Aqueous Processable Amorphous Polymer Films through Doping and Energy Transfer

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(31)

Published: June 10, 2022

Abstract Smart afterglow materials in response to excitation and delay time, including crystals, polymeric films, carbon dots, have attracted considerable attention on account of their fundamental value photophysics promising applications optoelectronics. However, the fabrication amorphous flexible polymer films with fine control remains underexplored. Herein, new doped based sodium alginate aromatic carboxylates are developed, which demonstrate following advantages: (i) easy fast through aqueous solution process, (ii) flexible, transparent, re‐dissolvable characteristics, (iii) multi‐tunable colors from blue red even white control. Specifically, better controllability can be achieved co‐doping triplet‐to‐singlet Förster resonance energy transfer (TS‐FRET). Multimode advanced anti‐counterfeiting these is demonstrated using excitation‐ time‐dependent as well TS‐FRET‐mediated colors.

Language: Английский

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Noncovalent Polymerization‐Activated Ultrastrong Near‐Infrared Room‐Temperature Phosphorescence Energy Transfer Assembly in Aqueous Solution

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(38)

Published: June 30, 2022

Noncovalent macrocycle-confined supramolecular purely organic room-temperature phosphorescence (RTP) is a current research hotspot. Herein, high-efficiency noncovalent polymerization-activated near-infrared (NIR)-emissive RTP-harvesting system in aqueous solution based on the stepwise confinement of cucurbit[7]uril (CB[7]) and β-cyclodextrin-grafted hyaluronic acid (HACD), reported. Compared with dodecyl-chain-bridged 6-bromoisoquinoline derivative (G), dumbbell-shaped assembly G⊂CB[7] presents an appeared complexation-induced RTP signal at 540 nm via first CB[7]. Subsequently, benefitting from encapsulation β-cyclodextrin cavity, subsequent polymerization binary enabled by HACD can contribute to further-enhanced emission intensity approximately eight times addition increased lifetime 59.0 µs 0.581 ms. Moreover, upon doping small amount two types dyes, Nile blue or tetrakis(4-sulfophenyl)porphyrin as acceptor into @ HACD, efficient energy transfer occurs accompanied long-lived NIR-emitting performance (680 710 nm) high donor/acceptor ratio. Intriguingly, prepared successfully applied for targeted NIR imaging living tumor cells utilizing targeting ability acid, which provides new strategy create advanced water-soluble phosphorescent materials.

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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