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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Advances in Polymer‐Based Organic Room‐Temperature Phosphorescence Materials

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(23)

Published: Jan. 28, 2024

Abstract Organic room‐temperature phosphorescence (RTP) materials are actively explored as attractive candidates for optoelectronic and bioelectronics applications given their unique long‐lived excited‐state features inherent merits of low‐cost, appreciable functionality, good biocompatibility. In recent years, many efforts in molecular design aggregation modulation devoted to achiev efficient RTP from organics, among which an emerging strategy focuses on confining chromophores within polymer matrices. Polymers possess intertwined chains making them a platform restrain the nonradiative decays quenching, allowing triplet excitons survive long time enough emission at room temperature. Progress relating polymer‐based organic is highlighted new creative subject field. This review outlines advancements materials. The fundamental mechanism first presented. Thereafter, considerations strategies construct summarized detail. Several promising progresses proposed use these materials, such encryption anti‐counterfeiting, sensors, bioimaging overviewed. Finally, challenges future perspectives discussed emphasize directions that deserve focus attention

Language: Английский

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Recent advances in multicolor organic room-temperature phosphorescence

Applied Physics Reviews, Journal Year: 2023, Volume and Issue: 10(2)

Published: May 31, 2023

Multicolor organic room temperature phosphorescence (RTP) has garnered wide research attention due to the long luminescence lifetime and tunable excited state properties, which show great potential in displays, anticounterfeiting, data encryption, sensing. However, because of sensitivity triplet excitons materials, emitting level compounds is hard manipulate. Therefore, realizing multicolor RTP materials still a huge challenge. In this review, we summarize recent advances including underlying mechanisms, design principles phosphorescence, detailed photophysical behaviors, their applications. The last part presents existing challenges future perspectives, such as expanding color gamut, enriching stimuli-responsive improving performance, exploring more advanced This review will provide inspiration guidelines for constructing applications electronics, bioelectronics, flexible so on.

Language: Английский

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Calcination temperature tuning of RTP and TADF with wide range of emission color from carbon dots confined in Al2O3

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 474, P. 145597 - 145597

Published: Aug. 23, 2023

Language: Английский

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Disorder‐Enhanced Charge‐Transfer‐Mediated Room‐Temperature Phosphorescence in Polymer Media

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(45)

Published: Sept. 21, 2023

Room-temperature phosphorescence (RTP) polymers have important applications for biological imaging, oxygen sensing, data encryption, and photodynamic therapy. Despite the many advantages polymeric materials offer such as great control over gas permeability processing flexibility, disorder is traditionally considered an intrinsic negative impact on efficiency embedded RTP luminophores, various allowed thermal motions could quench emitting states. However, we propose that disorder-enabled freedoms of microscopic can be beneficial charge-transfer-mediated RTP, which facilitated by molecular conformational changes among different electronic transition Using "classic" pyrene-aniline exciplex example, demonstrate mutual enhancement red/near-infrared green emissions from pyrene aniline moieties, respectively, upon doping polymer with trace derivatives. In comparison, a pyrene-doped crystal formed same structure exhibits only charge-transfer fluorescence no red or observed, suggesting order suppresses channels. The proposed polymerization strategy may used unified method to generate multi-emissive vast pool known unknown exciplexes complexes.

Language: Английский

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Endowing Carbon Dots with Long‐Lived Phosphorescence Emission in Aqueous Solutions

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

Published: Nov. 3, 2023

Abstract Room temperature phosphorescent carbon dots (RTP CDs) have received increasing attention in recent years due to their outstanding optical properties and potential applications. It is worth noting that RTP CDs aqueous solution inspired special interests because of low toxicity, long lifetime, ability avoid autofluorescence background fluorescence, exhibiting wide application prospects time‐resolved biological imaging sensing. However, achieving solutions remains a considerable challenge water molecules oxygen can cause the deactivation triplet‐state excitons, resulting phosphorescence quenching. Several strategies been proposed counter problem including encapsulated rigid matrix, hydrogen bonding, covalent bonding fixation. Consequently, more significant number materials with excellent stability, multicolor are successfully obtained. Herein, development as well corresponding fabricated luminescence mechanism detailly summarized reviewed. Furthermore, various applications water‐phase information security, sensing, bioimaging, light‐emitting diodes, fingerprinting also discussed. Finally, an outlook on proposed.

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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Time-dependent photo-activated aminoborane room-temperature phosphorescence materials with unprecedented properties: simple, versatile, multicolor-tuneable, water resistance, optical information writing/erasing, and multilevel data encryption

Chemical Science, Journal Year: 2023, Volume and Issue: 14(17), P. 4633 - 4640

Published: Jan. 1, 2023

Triarylboranes-based pure organic room-temperature phosphorescence (RTP) materials are rarely investigated because of their large steric hindrance and the electron defect boron atom. As a result, creating functional triarylborane RTP is difficult. Herein, we report first photo-activated with lifetimes/quantum yields ≤0.18 s/6.83% based on donor (D)-π-acceptor (A) from methylene carbazole-functionalized aminoborane (BN)-doped polymethyl methacrylate (BN-o-Met-Cz@PMMA) under 365 nm UV irradiation (30 s). Incredibly, BN-o-Met-Cz@PMMA films exhibited unprecedented dual-response properties (e.g., air + nm: τP = 0.18 s, ΦP 6.83%; N2 0.42 17.34%). Intriguingly, BN (D-π-A) system demonstrated good versatility for whether electron-donating group or electron-withdrawing was placed in ortho (meta)-position B series single-molecule multi-color emission, high quantum yields, ultra-long lifetimes can be prepared rapidly. BN-X@PMMA showed broad application prospects information encryption, data erasure, anti-counterfeiting, water resistance. Our method provides new strategies design, synthesis, materials, thereby enriching types facilitating further developments this area.

Language: Английский

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Excitation- & concentration-dependent color-tunable ultra-long phosphorescence of isophthalonitriles doped polymers

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 469, P. 143929 - 143929

Published: June 5, 2023

Language: Английский

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Mesoporous collapsing encapsulated carbon dots: Direct evidence for the effect of multiple-confined interactions of silica on efficient long-lived phosphorescence

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 486, P. 150436 - 150436

Published: March 16, 2024

Language: Английский

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