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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Recent Progress in Inorganic Afterglow Materials: Mechanisms, Persistent Luminescent Properties, Modulating Methods, and Bioimaging Applications

Advanced Optical Materials, Journal Year: 2023, Volume and Issue: 11(11)

Published: Jan. 8, 2023

Abstract Persistent luminescence (PL) is a distinctive optical phenomenon with long‐lasting afterglow emissions after the cessation of excitation, thus emerging huge prospects in applications anti‐counterfeiting, information or data storage, photocatalysis, sensing, and bioimaging. In this regard, it great importance to optimize PL performance. Recently, no comprehensive literature review on inorganic persistent phosphors reported aid researchers focusing systematic adjustment properties based progress made recent ten years. Accordingly, motivation work that are interest for dopant host selection criteria, intensity, multi‐color modulating methods, from perspectives composition optimization, defect engineering, coordination environment hosts. Then, X‐ray, light emitting diode (LED), ultraviolet (UV), near‐infrared (NIR) excited imaging multimodal introduced. Finally, summary, challenge, outlook, future development direction field provided. With profound influence materials, believed will be guideline design, synthesis, performance optimization materials future.

Language: Английский

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Photo‐Induced Dynamic Room Temperature Phosphorescence Based on Triphenyl Phosphonium Containing Polymers

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(18)

Published: Jan. 20, 2022

Abstract Long‐lived room temperature phosphorescence (RTP) systems have become a research focus in the field of functional materials due to their fascinating luminescence properties. However, it is still an enormous challenge realize RTP under ambient conditions, since can be quenched easily by molecular oxygen. Herein, two polymer acceptors containing triphenyl phosphonium bromide salt are designed and synthesized successfully. They then doped into poly(methyl methacrylate) matrix with donor molecules form flexible films long‐lived RTP. Interestingly, performance highly dependent on grafting rate polymers. Upon increasing rate, aggregation degree increases, further inhibiting movement aggregates reducing nonradiative vibration deactivation triplet excitons for achieving green Meanwhile, visualization real information complete pattern after 365 nm UV irradiation demonstrated based these systems, presenting application potential toward dynamic multilevel encryption display devices. This work provides innovative principle activation polymeric conditions.

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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Organic room-temperature phosphorescence materials for bioimaging

Chemical Communications, Journal Year: 2023, Volume and Issue: 59(36), P. 5329 - 5342

Published: Jan. 1, 2023

Organic room-temperature phosphorescence (RTP) materials are currently the focus of research in field bioimaging. In comparison with conventional imaging modalities based on organic fluorescent dyes, RTP long lifetime enable time-resolved to improve resolution by avoiding autofluorescence. this review, we will start summarizing strategies for achieving high performance bioimaging, including development RTP-compounds, host-guest doping materials, and supramolecular assemblies. We then discuss optimization nanonization processes obtain nanoparticles controllable size, dispersibility, improved stability. The differences between top-down bottom-up approaches further described. Finally, briefly introduce emerging methods preparing

Language: Английский

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Stimulus-Responsive Organic Phosphorescence Materials Based on Small Molecular Host–Guest Doped Systems

The Journal of Physical Chemistry Letters, Journal Year: 2023, Volume and Issue: 14(7), P. 1794 - 1807

Published: Feb. 10, 2023

Small molecular host–guest doped materials exhibit superiority toward high-efficiency room-temperature phosphorescence (RTP) due to their structural design diversity and ease of preparation. Dynamic RTP display excellent characteristics, such as good reversibility, quick response, tunable luminescence ability, making them applicable various cutting-edge technologies. Herein, we summarize the advances in dynamic that respond external internal stimuli present some insights into strategies underlying mechanisms. Subsequently, specific viewpoints are described regarding this promising field for development materials. This Perspective is highly beneficial future intelligent applications systems.

Language: Английский

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Twofold rigidity activates ultralong organic high-temperature phosphorescence

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Feb. 10, 2024

Abstract A strategy is pioneered for achieving high-temperature phosphorescence using planar rigid molecules as guests and polymers host matrix. The configuration can resist the thermal vibration of guest at high temperatures, rigidity matrix further enhances resistance guest. doped materials exhibit an afterglow 40 s 293 K, 20 373 6 413 a 1 433 K. experimental results indicate that rotational ability groups connected to gradually increases, performance decreases. In addition, utilizing property emit temperatures in smoke, attempt made use organic identify rescue workers trapped personnel fires.

Language: Английский

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Phosphine‐Manipulated p‐π and π‐π Synergy Enables Efficient Ultralong Organic Room‐Temperature Phosphorescence

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)

Published: March 21, 2023

Organic room temperature phosphorescence (RTP) attracts extensive attentions, but still faces the challenge of achieving both high RTP efficiencies (ηRTP ) and long lifetimes (τRTP ), due to intrinsic contradiction between triplet radiation stabilization. In this work, we developed three carbazole-triphenylphosphine hybrids named xCzTPP, in which phosphine groups provide nonbonding electrons steric hindrance modulate intermolecular p-π π-π interactions. With rational orientations spatial positions functional groups, para-substituted pCzTPP achieves ηRTP over 10 % more than twofold increased τRTP (>600 ms), compared ortho- meta- isomers. Theoretical simulation photophysical investigation indicate that strongest electronic interplays harmonize transition probability 3 pπ state stability ππ state, reflecting synergy process.

Language: Английский

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Observation of Chiral-selective room-temperature phosphorescence enhancement via chirality-dependent energy transfer

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

Published: March 18, 2023

Pure organic room-temperature phosphorescence (RTP), particularly from guest-host doped systems, has seen exponential growth in the last several years due to their high modulation flexibility, and yet challenges remain with respect mechanistic elucidations advantageous applications. Here we show that by constructing RTP systems chiral components, namely, amino compound-modified phthalimide hosts naphthalimide guests, a chiral-selective enhancement phenomenon can be observed. For example, R-enantiomeric guests produce strong red afterglow while no appreciable could observed S-R counterpart. An unprecedented intensity difference > 102 folds ability distinguish an enantiomeric excess of 98% achieved. Temperature-dependent measurements suggest chirality-dependent energy transfer process may involved phenomenon, which harnessed extend application recognition compounds, such as alcohols.

Language: Английский

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