Recent Advances of Pure Organic Room Temperature Phosphorescence Based on Functional Polymers

Accounts of Materials Research, Journal Year: 2023, Volume and Issue: 4(10), P. 827 - 838

Published: Aug. 26, 2023

ConspectusThe phosphorescence is produced by the radiative transition of excited triplet state which generated intersystem crossing (ISC) from singlet state. Compared with fluorescence, it has a longer luminescence lifetime and larger Stokes shift, so phosphorescent materials have great application value in fields such as displays, anticounterfeiting, imaging. But due to low ISC rate organic molecules, slow state, large nonradiative energy loss caused molecular vibration, pure room temperature (RTP) usually difficult obtain. Among most widely used strategies including crystal assembly, polymerization, host–guest encapsulation, polymerization strategy based on rigid polymers achieved success widespread attention their easy processing excellent performance.The main function fix luminophore into matrix suppress transitions oxygen quenching. That is, provide microenvironment necessary for RTP, although some are flexible stretchable. Conventional limited interaction luminophores do not promoting states. Therefore, high RTP quantum yield depends more structural design luminophores. By modification structure, functionalized can be endowed ability regulate levels luminophores, enhance ISC, increase RTP. The selection also enriches diverse properties materials.This Account summarizes latest research progress field polymer-based enhancement polymers. Luminophores construct systems doping, covalent linking, or supramolecular interactions PAA, PMMA, PVA, PAM. To further strengthen polymer rigidity, secondary been successfully employed synergistically nonradioactivation performance, hydrogen bonding bridges, cross-linking. no suppressing but includes enhancing states generating special phenomena. A few specially designed utilize external heavy atom effects, dipole–dipole interactions, electrostatic diffusion promote rate. Due diversification functionalization polymers, were developed various phenomena photoactivation, excitation wavelength dependence, photochromism, circularly polarized stimulus-response. We hope summarized functions development trends helpful guidance designing high-performance materials.

Language: Английский

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Synergetic Conformational Regulations in Ground and Excited States for Realizing Stimulus-Responsive and Wide-Tuning Room-Temperature Phosphorescence

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(30), P. 16748 - 16759

Published: July 20, 2023

Understanding the changes of molecular conformations is crucial for realizing multiple emissive triplet states in room-temperature phosphorescence (RTP) materials. In this work, we report two molecules, 4,4'-dimethylbenzil (DMBZ) and 4,4'-di-tert-butylbenzil (DBBZ) with conformation-dependent luminescence, demonstrate that stimulus-responsive wide-tuning RTP emissions can be realized via synergetic conformational regulations ground excited states. Due to changes, DMBZ DBBZ show abundant variations upon external stimuli, including light, force, heat, fumigation. Notably, exhibits both states, which endow unique behaviors. presents phase transitions between supercooled liquid state different solid accompanied by transitions, excited-state are effectively regulated. Moreover, wide-range (between cyan, green, yellow) single component host-guest systems DBBZ, showing potential applications temperature sensing, multicolor dynamic displays, information encryption. These results may provide new visions understanding complicated aggregated state, as well insights into relationship conformations, emissions, stimulus responsiveness.

Language: Английский

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Tailored Fabrication of Full‐Color Ultrastable Room‐Temperature Phosphorescence Carbon Dots Composites with Unexpected Thermally Activated Delayed Fluorescence

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(27)

Published: April 23, 2024

Abstract The development of single‐system materials that exhibit both multicolor room‐temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) with tunable after glow colors channels is challenging. In this study, four metal‐free carbon dots (CDs) are developed through structural tailoring, panchromatic high‐brightness RTP achieved via strong chemical encapsulation in urea. maximum lifetime quantum yield reaches 2141 ms 56.55%, respectively. Moreover, CDs‐IV@urea, prepared coreshell interaction engineering, exhibits a dual afterglow red green TADF. degree conjugation functional groups precursors affects the binding interactions nitrogen cladding on CDs, which turn stabilizes triplet energy levels gap between S 1 T (Δ E ST ) to induce RTP. enhanced wrapping lowers Δ , promoting reverse intersystem crossing, leads This fully state, thus stabilizing material water, even extreme environments such as acids oxidants. These tested multicolor, time, temperature multiencryption well vivo bioimaging. Hence, these have promising practical applications information security biomedical diagnosis treatment.

Language: Английский

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Multi‐stimulus Room Temperature Phosphorescent Polymers Sensitive to Light and Acid cyclically with Energy Transfer

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(44)

Published: Aug. 19, 2023

Abstract The stimulus‐responsive room temperature phosphorescent (RTP) materials have endowed wide potential applications. In this work, by introducing naphthalene and spiropyran (SP) into polyacrylamide as the energy donor acceptor respectively, a new kind of brilliant dynamic color‐tunable amorphous copolymers were prepared with good stability processibility, afterglow emissions from green to orange in response stimulus photo or acid, thanks multi‐responsibility SP transfer between SP. addition deeply exploring inherent mechanism, these been successfully applied dynamically controllable applications information protection delivery.

Language: Английский

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Biobased and biodegradable films exhibiting circularly polarized room temperature phosphorescence

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

Published: March 15, 2024

Abstract There is interest in developing sustainable materials displaying circularly polarized room-temperature phosphorescence, which have been scarcely reported. Here, we introduce biobased thin films exhibiting luminescence with simultaneous phosphorescence. For this purpose, phosphorescence-active lignosulfonate biomolecules are co-assembled cellulose nanocrystals a chiral construct. The shown to capture the chirality generated by within films, emitting phosphorescence 0.21 dissymmetry factor and 103 ms lifetime. By contrast most organic materials, chiral-phosphorescent system possesses stability, no significant recession under extreme chemical environments. Meanwhile, luminescent resist water humid environments but fully biodegradable (16 days) soil conditions. introduced bio-based, environmentally-friendly expected open many opportunities, as demonstrated here for information processing anti-counterfeiting.

Language: Английский

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Achieving Efficient Dark Blue Room‐Temperature Phosphorescence with Ultra‐Wide Range Tunable‐Lifetime

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)

Published: March 26, 2024

Abstract Tunable‐lifetime room‐temperature phosphorescence (RTP) materials have been widely studied due to their broad applications. However, only few reports achieved wide‐range lifetime modulation. In this work, ultra‐wide range tunable‐lifetime efficient dark blue RTP were realized by doping methyl benzoate derivatives into polyvinyl alcohol (PVA) matrix. The lifetimes of the doped films can be increased from 32.8 ms 1925.8 ms. Such wide modulation is extremely rare in current reports. Moreover, emission 4‐hydroxybenzoate‐doped film located region and quantum yield reaches as high 15.4 %, which broadens applications organic optoelectronic information. Further studies demonstrated that reason for tunable was magnitude electron‐donating ability substituent group modulates HOMO–LUMO singlet‐triplet energy gap derivatives, well non‐covalent interactions with PVA. potential luminescent displays optical anti‐counterfeiting these high‐performance conducted.

Language: Английский

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Modulation of Deep-Red to Near-Infrared Room-Temperature Charge-Transfer Phosphorescence of Crystalline “Pyrene Box” Cages by Coupled Ion/Guest Structural Self-Assembly

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(4), P. 2484 - 2493

Published: Jan. 17, 2024

Organic cocrystals obtained from multicomponent self-assembly have garnered considerable attention due to their distinct phosphorescence properties and broad applications. Yet, there been limited reports on cocrystal systems that showcase efficient deep-red near-infrared (NIR) charge-transfer (CT) phosphorescence. Furthermore, effective strategies modulate the emission pathways of both fluorescence remain underexplored. In this work, we dedicated our work four self-assembled called "pyrene box" cages using 1,3,6,8-pyrenetetrasulfonate anions (PTS4–), 4-iodoaniline (1), guanidinium (G+), diaminoguanidinium (A2G+), hydrated K+ countercations. The binding such cations PTS4– platforms adaptively modulates supramolecular stacking with guest molecules 1, allowing steer pathways. Notably, confinement molecule 1 within PTSK{1} PTSG{1} leads an NIR CT emission. addition fuming gases like triethylamine HCl allows reversible pH modulations binding, which in turn induce a transition cage between states. This capability was further illustrated through proof-of-concept demonstration shrimp freshness detection. Our findings not only lay foundation for future designs leveraging weak intermolecular host–guest interactions engineer excited states interacting chromophores but also broaden prospective applications room-temperature materials food safety

Language: Английский

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Multi‐Functional Integration of Phosphor, Initiator, and Crosslinker for the Photo‐Polymerization of Flexible Phosphorescent Polymer Gels

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

Published: March 8, 2024

A general approach to constructing room temperature phosphorescence (RTP) materials involves the incorporation of a phosphorescent emitter into rigid host or polymers with high glass transition temperature. However, these often suffer from poor processability and suboptimal mechanical properties, limiting their practical applications. In this work, we developed benzothiadiazole-based dialkene (BTD-HEA), multifunctional remarkable yield intersystem crossing (Φ

Language: Английский

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High‐Performance Organic Ultralong Room Temperature Phosphorescence Based on Biomass Macrocycle

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Abstract The pursuit of sustainable, high‐performance organic ultralong room temperature phosphorescence (OURTP) materials with stimulus‐responsive properties presents a significant and enticing yet formidable challenge. Herein, an efficient strategy to confining boric acid‐based compounds into biomass macrocycle γ‐cyclodextrin through multiple interactions is developed, enabling the construction multicolor OURTP doped systems. synergistic effects strong hydrogen bonding, C─O─B covalent cross‐linking, host–guest encapsulation significantly suppress non‐radiative transition, culminating in extraordinary lifetime excellent quantum yield 4.65 s 32.8%, respectively, which are far superior reported RTP materials. Additionally, merging phosphors contributes stimulus responses, overcoming inherent limitations degradation recycling compounds, dynamically modulating signals multiple‐stimulus achieving integration multifunctional dynamic data processing techniques. This work will provide direction for new environmentally friendly potentially commercially available

Language: Английский

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Multi‐Color Pure Organic Room Temperature Phosphorescent Materials with Long Lifetime and High Efficiency

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(7)

Published: Nov. 3, 2023

Abstract Organic room temperature phosphorescent (ORTP) materials have garnered significant interest in the fields of anti‐counterfeiting, optical display, and bio‐imaging owing to their distinctive properties. However, a major drawback most existing ORTP is short phosphorescence lifetime low quantum yields (QYs), which greatly limit applicability across multiple fields. In this paper, covalently assisted host‐guest doping strategy that involves embedding three aminobenzoic acids with different carboxylate substitution positions into cyanuric acid (CA) matrix through covalent bonding using microwave heating proposed. All prepared exhibit long exceeding 600 ms high (PhQYs) surpassing 20%. Among them, composite 2‐aminoterephthalic (2‐A) anuric stands out its unique blue phosphorescence, boasting an exceptional absolute photoluminescence yield (PLQY) 98.95% remarkable (PhQY) 76.42%, along 800 ms. Importantly, these high‐performance been successfully utilized anti‐counterfeiting display applications.

Language: Английский

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