Long-Lived Organic Room-Temperature Phosphorescence from Amorphous Polymer Systems

Accounts of Chemical Research, Journal Year: 2022, Volume and Issue: 55(8), P. 1160 - 1170

Published: April 8, 2022

Long-lived organic room-temperature phosphorescence (RTP) materials have recently drawn extensive attention because of their promising applications in information security, biological imaging, optoelectronic devices, and intelligent sensors. In contrast to conventional fluorescence, the RTP phenomenon originates from slow radiative transition triplet excitons. Thus, enhancing intersystem crossing (ISC) rate lowest excited singlet state (S1) suppressing nonradiative relaxation channels (T1) are reasonable methods for realizing highly efficient purely materials. Over past few decades, many strategies been designed on basis above two crucial factors. The introduction heavy atoms, aromatic carbonyl groups, other heteroatoms with abundant lone-pair electrons has demonstrated strengthen spin-orbit coupling, thereby successfully facilitating ISC process. Furthermore, rigid environment is commonly constructed through crystal engineering restrict intramolecular motions intermolecular collisions decrease excited-state energy dissipation. However, most crystal-based suffer poor processability, flexibility, reproducibility, becoming a thorny obstacle practical application.Amorphous polymers long-lived characteristics more competitive science. intertwined structures long chains not only ensure multiple interactions but also protect excitons surroundings, which conducive ultralong bright emission. Exploring fabrication strategies, intrinsic mechanisms, desirable remains formidable challenge. particular, polymer systems that capable dynamically responding external stimuli (e.g., light, temperature, oxygen, humidity) rarely reported. To develop multifunctional expand potential applications, great amount effort expended.This Account gives summary significant advances amorphous systems, especially smart stimulus-responsive ones, focusing construction suppress deactivation by inter/intramolecular interactions. typical mainly include hydrogen bonding, ionic covalent can change molecular electronic affect dissipation states. An in-depth understanding mechanisms an exploration excitation-dependent color-tunable, ultraviolet (UV) irradiation-activated, temperature-dependent, water-responsive, circularly polarized distinctly illustrated this Account. we propose some detailed perspectives terms design, mechanism exploration, application hope provide helpful guidance future development polymers.

Language: Английский

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Photoprogrammable circularly polarized phosphorescence switching of chiral helical polyacetylene thin films

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Dec. 21, 2022

The developments of pure organic room-temperature phosphorescence (RTP) materials with circularly polarized luminescence (CPL) have significantly facilitated the future integration and systemization luminescent material in fundamental science technological applications. Here, a type photoinduced RTP are constructed by homogeneously dispersing phosphorescent chiral helical substituted polyacetylenes into processable poly(methyl methacrylate) (PMMA) matrix. These play vital roles propagation CPL present prominently optical characteristics high absorption dissymmetric factors up to 0.029 (gabs) 0.019 (glum). oxygen consumption properties films under UV light irradiation endow dynamic chiro-optical functionality, which can leverage precisely control manipulate remarkable advantages being contactless, wireless fatigue-resistant. Significantly, distinct be used as anti-counterfeiting involving photoprogrammability.

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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Dynamic organic room-temperature phosphorescent systems

Chem, Journal Year: 2023, Volume and Issue: 9(9), P. 2446 - 2480

Published: June 20, 2023

Language: Английский

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Room temperature charge-transfer phosphorescence from organic donor–acceptor Co-crystals

Chemical Science, Journal Year: 2022, Volume and Issue: 13(34), P. 10011 - 10019

Published: Jan. 1, 2022

Engineering the electronic excited state manifolds of organic molecules can give rise to various functional outcomes, including ambient triplet harvesting, that has received prodigious attention in recent past. Herein, we introduce a modular, non-covalent approach bias entire landscape an molecule using tunable 'through-space charge-transfer' interactions with appropriate donors. Although charge-transfer (CT) donor-acceptor complexes have been extensively explored as and supramolecular motifs realm soft materials, they could not imprint their potentiality field luminescent it still remains challenge. Thus, present study, investigate modulation emission characteristics simple pyromellitic diimide derivative on complexation donor varying demonstrate selective harvesting from its locally (LE) CT singlet states. Remarkably, co-crystallization heavy-atom substituted electron-rich aromatic donors leads unprecedented phosphorescence impressive efficiency notable lifetime. Further, gradual minimizing electron-donating strength 1,4-diiodo-2,3,5,6-tetramethylbenzene (or 1,2-diiodo-3,4,5,6-tetramethylbenzene) 1,2-diiodo-4,5-dimethylbenzene 1-bromo-4-iodobenzene modulates source 3CT 3LE state. Through comprehensive spectroscopic, theoretical studies, single-crystal analyses, elucidate unparalleled role intermolecular toggle between emissive states stabilize excitons. We envisage study will be able provide new innovative dimensions existing molecular designs employed for harvesting.

Language: Английский

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Full-color persistent room temperature phosphorescent elastomers with robust optical properties

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

Published: Aug. 10, 2023

Abstract Persistent room temperature phosphorescent materials with unique mechanical properties and robust optical have great potential in flexible electronics photonics. However, developing such remains a formidable challenge. Here, we present highly stretchable, lightweight, multicolored persistent luminescence elastomers, produced by incorporating ionic polymers polyvinyl alcohol into polydimethylsiloxane matrix. These prepared elastomers exhibit high transparency daylight emit bright after the removal of 365 nm excitation. The homogeneous distribution within matrix has been confirmed confocal fluorescence microscopy, scanning electron atomic force microscopy. Mechanical property investigations revealed that possess satisfactory stretchability. Impressively, these maintain even under extensive repeated deformations, characteristic previously unprecedented. fantastic features make ideal candidates for applications wearable devices, displays, anti-counterfeiting.

Language: Английский

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Phosphorescent carbon dots: Intermolecular interactions, properties, and applications

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 503, P. 215642 - 215642

Published: Jan. 2, 2024

Language: Английский

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Visible‐Light Manipulated Reversible and Ultralong Phosphorescence of Carbon Dots Through Dynamic Cross‐Linking

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(45)

Published: May 29, 2024

Abstract Dynamic organic room‐temperature phosphorescence (RTP) materials are highly promising for various applications. However, developing photo‐responsive RTP systems with simple fabrication, high reversibility, and visible‐light responsiveness presents a significant challenge. Herein, in situ embedding of boron‐doped carbon dots (B‐CDs) amorphous polymer (pPBA) is achieved by two‐step polymerization carbonization process. Impressively, the B‐CDs@pPBA composite exhibits visible‐light‐activated ultralong full reversibility lifetime on–off ratio exceeding 280. By correlating photophysical properties structural characterization results, it concluded that photoinduced intensifying crosslinking between B‐CDs pPBA responsible dynamic RTP. More interestingly, film found to display bending actuation reversible deformable behavior upon light exposure. Finally, potential applications such programmable information storage encryption demonstrated. This research may pave new way development nanomaterials promote their use wide range

Language: Английский

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