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

Accounts of Chemical Research, Год журнала: 2022, Номер 55(8), С. 1160 - 1170

Опубликована: Апрель 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.

Язык: Английский

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Assembly and Applications of Macrocyclic-Confinement-Derived Supramolecular Organic Luminescent Emissions from Cucurbiturils

Chemical Reviews, Год журнала: 2022, Номер 122(9), С. 9032 - 9077

Опубликована: Март 21, 2022

Cucurbit[n]urils (Q[n]s or CB[n]s), as a classical of artificial organic macrocyclic hosts, were found to have excellent advantages in the fabricating tunable and smart luminescent materials aqueous media solid state with high emitting efficiency under rigid pumpkin-shaped structure-derived macrocyclic-confinement effect recent years. This review aims give systematically up-to-date overview Q[n]-based supramolecular emissions from confined spaces triggered host–guest complexes, including assembly fashions mechanisms macrocycle-based well their applications. Finally, challenges outlook are provided. Since this class emissions, which essentially derived cavity-dependent confinement resulting fashions, emerged only few years ago, we hope will provide valuable information for further development light-emitting other related research fields.

Язык: Английский

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Multicharged cyclodextrin supramolecular assemblies

Chemical Society Reviews, Год журнала: 2022, Номер 51(11), С. 4786 - 4827

Опубликована: Янв. 1, 2022

Multicharged cyclodextrin (CD) supramolecular assemblies, including those based on positively/negatively charged modified mono-6-deoxy-CDs, per-6-deoxy-CDs, and random 2,3,6-deoxy-CDs, as well parent CDs binding guests, have been extensively applied in chemistry, materials science, medicine, biological catalysis, other fields. In this review, we primarily focus summarizing the recent advances encapsulating especially construction process of assemblies their applications. Compared with uncharged CDs, multicharged display remarkably high antiviral antibacterial activity efficient protein fibrosis inhibition. Meanwhile, can interact oppositely dyes, drugs, polymers, biomacromolecules to achieve effective encapsulation aggregation. Consequently, CD show great advantages improving drug-delivery efficiency, luminescence properties materials, molecular recognition imaging, toughness hydrogels, addition enabling multistimuli-responsive assemblies. These features are anticipated not only promote development CD-based chemistry but also contribute rapid exploitation these diverse interdisciplinary

Язык: Английский

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Ultralong Organic Phosphorescence: From Material Design to Applications

Accounts of Chemical Research, Год журнала: 2022, Номер 55(23), С. 3445 - 3459

Опубликована: Ноя. 11, 2022

Organic phosphorescence is defined as a radiative transition between the different spin multiplicities of an organic molecule after excitation; here, we refer to photoexcitation. Unlike fluorescence, it shows long emission lifetime (∼μs), large Stokes shift, and rich excited state properties, attracting considerable attention in electronics during past years. Ultralong (UOP), type persistent luminescence phosphors, over 100 ms normally according resolution limit naked eye. According Jablonski energy diagram, two prerequisites are necessary for UOP generation enhancement. One promote intersystem crossing (ISC) excitons from singlet triplet states by enhancing spin-orbit coupling (SOC); other suppress nonradiative transitions states.In this Account, will give summary our research on ultralong phosphorescence, including design materials, manipulation fabrication nano/microstructures, function applications. First, brief introduction development. Then, discuss constructed methods materials inter/intramolecular interaction types, π-π interactions, intermolecular hydrogen bonds, halogen ionic covalent so on. These effective interactions can build rigid environment restrain molecular motions or external quenching oxygen, moisture, heat, thus enhance performance. Next, containing excitation wavelength, colors, lifetimes, quantum efficiency (QE), through crystal engineering be summarized. Recently, wavelengths regulated regions, such UV, visible light, X-ray; colors cover whole visible-light region, deep blue red; reach 2.5 s, achieved up 96.5%. Moreover, present micro/nanoscale preparation micro/nanostructure, optical performance, device fabrication. Afterward, review potential applications organic/bio-optoelectronics, information encryption, bioimaging, sensing, afterglow display, etc. Finally, outlook development proposed.

Язык: Английский

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Highly Efficient Blue Phosphorescence from Pillar‐Layer MOFs by Ligand Functionalization

Advanced Materials, Год журнала: 2021, Номер 34(5)

Опубликована: Ноя. 22, 2021

Room temperature phosphorescence (RTP) has been extensively researched in heavy-metal containing complexes and purely organic systems. Despite the rapid blossom of RTP materials, it is still a tremendous challenge to develop highly efficient blue materials with long-lived lifetimes. Taking metal-organic framework (MOF) as model, herein, feasible strategy ligand functionalization proposed, including two essential elements, high efficiency lifetimes simultaneously under ambient conditions. One isolation chromophores assistance another predefined co-ligands, other restriction chromophores' motions through coordination host-guest interactions. Remarkably, renders MOFs up 80.6% lifetime 169.7 ms Moreover, demo crown fabricated ink by 3D printing technique. The potential applications for anti-counterfeiting fingerprint visualization have also demonstrated. This finding not only outlines universal principle design synthesize but endows traditional fresh vitality applications.

Язык: Английский

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

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(15), С. 6946 - 6953

Опубликована: Март 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.

Язык: Английский

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Supramolecular assembly confined purely organic room temperature phosphorescence and its biological imaging

Chemical Science, Год журнала: 2022, Номер 13(27), С. 7976 - 7989

Опубликована: Янв. 1, 2022

Purely organic room temperature phosphorescence, especially in aqueous solution, is attracting increasing attention owing to its large Stokes shift, long lifetime, low preparation cost, toxicity, good processing performance advantages, and broad application value. This review mainly focuses on macrocyclic (cyclodextrin cucurbituril) hosts, nanoassembly, macromolecule (polyether) confinement-driven RTP. As an optical probe, the assembly two-stage strategy can realize confined purely RTP achieve energy transfer light-harvesting from fluorescence delayed or phosphorescence. supramolecular widely applied for luminescent materials, cell imaging, other fields because it effectively avoids oxygen quenching. In addition, near-infrared excitation, emission,

Язык: Английский

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Phosphorescence resonance energy transfer from purely organic supramolecular assembly

Nature Reviews Chemistry, Год журнала: 2023, Номер 7(12), С. 854 - 874

Опубликована: Ноя. 22, 2023

Язык: Английский

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Clusterization-Triggered Color-Tunable Room-Temperature Phosphorescence from 1,4-Dihydropyridine-Based Polymers

Journal of the American Chemical Society, Год журнала: 2021, Номер 144(3), С. 1361 - 1369

Опубликована: Дек. 23, 2021

A series of poly(1,4-dihydropyridine)s (PDHPs) were successfully synthesized via one-pot metal-free multicomponent polymerization diacetylenic esters, benzaldehyde, and aniline derivatives. These PDHPs without traditional luminescent units endowed with tunable triplet energy levels by through-space conjugation from the formation different cluster sizes. The large compact clusters can effectively extend phosphorescence wavelength. excitons be stabilized using benzophenone as a rigid matrix to achieve room-temperature phosphorescence. nonconjugated polymeric show emission up 645 nm. combination static dynamic laser light scattering was conducted for insight into structural information on formed in host melt. Moreover, both fluorescence easily tuned variation excitation wavelength, concentration, molecular weight guest polymers. This work provides unique designing host-guest systems new strategy development long wavelength materials.

Язык: Английский

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

Advanced Materials, Год журнала: 2022, Номер 34(31)

Опубликована: Июнь 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.

Язык: Английский

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