Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161969 - 161969
Published: March 1, 2025
Language: Английский
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
Citations
34
Chemical Science, Journal Year: 2024, Volume and Issue: 15(12), P. 4222 - 4237
Published: Jan. 1, 2024
In this perspective, the progress in ion-regulated organic RTP materials and described roles of ions, including ion–π interactions, electrostatic coordinate have been summarized.
Language: Английский
Citations
21
Advanced Science, Journal Year: 2024, Volume and Issue: 11(28)
Published: May 17, 2024
Abstract Organic near‐infrared (NIR) room temperature phosphorescence (RTP) materials become a hot topic in bioimaging and biosensing for the large penetration depth high signal‐to‐background ratio (SBR). However, it is challenging to achieve persistent NIR severe nonradiative transitions by energy‐gap law. Herein, universal system with RTP built visible (host) (guest) materials, which can efficiently suppress rigid environment of crystalline host good matching, further promote emission additional resonance energy transfer (≈100%) between them. The ten‐folds enhancement lifetimes, compared those guest luminogens, be achieved modulation aggregated structures host–guest systems. This work provides convenient way largely prolong lifetimes various promoting their application afterglow imaging deeper higher SBRs.
Language: Английский
Citations
16
Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 25, 2025
Abstract Pure organic stimuli‐responsive phosphorescent materials with multi‐color afterglows, good reversibility, and ease manipulation are highly appealing for dynamic anti‐counterfeiting applications, but remain challenging to achieve. In this work, a soft organogel is rationally designed by introducing functional carbonyl (benzoyl or acetyl) units into dibenzofuran skeleton promote the intersystem crossing (ISC), screening potential organogelators through predicting self‐assembly process aid of all‐atom molecular simulation (AMDS). AMDS indicates that gelator candidates ( DBF‐Me DBF‐Ph ) can self‐assemble in mixture DMSO/H 2 O balanced π‐π intermolecular interactions between neighboring molecules, thus promoting gelation. Notably, fiber gel exhibits yellow afterglow at room temperature (298 K) lifetime 235.1 ms, which be switched off 358 K restored after cooling temperature. Furthermore, turn green 208 blue 77 K, due slight change conformation packing as revealed analysis temperature‐dependent single crystal structures. This single‐component gel, capable achieving color‐tunable “on‐off”‐switchable response, offers significant developing ultralong RTP multi‐level features.
Language: Английский
Citations
1
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 21, 2025
Abstract Organic materials with red persistent phosphorescence hold immense promise for biotechnology due to their excellent tissue permeability and high signal‐to‐background ratios. However, inefficient spin‐orbit coupling, triplet susceptibility, narrow energy gapspromoted nonradiative deactivations, pose a formidable obstacle achieving efficient phosphorescence. This study addresses these challenges by introducing xanthone (Xan)‐based host–guest systems. Utilizing polyaromatic hydrocarbons (PAHs) as guests, near‐infrared (NIR) phosphorescent ultralong lifetimes quantum yields of up 821 ms 2.32%, respectively, are successfully developed. Ultrafast spectroscopy theoretical studies reveal that Dexter transfer (DET) is the dominant mechanism responsible DET process between Xan PAHs not only effectively utilizes dark state host but also significantly enhances generation PAH transforming them into potent luminophores. Furthermore, inherent rigidity endows resulting performance, even at elevated temperatures (e.g., 423 K). strategy, proven be general, paves way designing red/NIR through mechanism, enabling applications in molecular imaging advanced high‐temperature encryption.
Language: Английский
Citations
1
Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 28, 2025
Abstract In recent years, organic room‐temperature phosphorescence (RTP) materials have garnered significant research interest. However, the design and synthesis of novel polymeric RTP systems continue to pose substantial challenges. By leveraging cyclotriphosphazene functionalization, four phosphors are successfully developed. The presence numerous heteroatoms (O, N, P) within this structure significantly enhances molecular spin‐orbit coupling (SOC). Initially, incorporation these into a polyvinyl alcohol (PVA) matrix yielded only weak emissions. Remarkably, thermal annealing transformed long‐lived cross‐linked polymer films. Specifically, representative luminescent film (THMD@PVA) exhibits enhancements in intensity, lifetime, afterglow brightness, quantum yield by factors 8, 4, 18, 6, respectively. With superior mechanical luminescence properties, well‐suited for creating flexible reconfigurable 3D objects. Furthermore, dual fluorescent phosphorescent emissions expands their applicability, including fingerprint recording, thereby broadening application scope materials.
Language: Английский
Citations
1
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(46)
Published: July 9, 2024
Abstract In recent years, there is a growing interest in developing ultralong organic room‐temperature phosphorescence (ORTP) with lifetimes the range of seconds. As one important three primary colors, blue ORTP an indispensable core component RTP regulation and application, however, large Stokes shift characteristics pose certain challenges ORTP. Here, new family phosphors are synthesized realized through crystal assembly water phase. Remarkably, compared to materials obtained phases, enabled long‐lived up 2.3 s quantum yield reached as high 29.27%. addition efficient green form, such dark possessed thermal stability flexible tunability. Moreover, superiority selected components demonstrated by comparing them polymer proposed show great potential programmable information encryption/anti‐counterfeiting.
Language: Английский
Citations
7
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 492, P. 152419 - 152419
Published: May 20, 2024
Language: Английский
Citations
5
Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(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
Citations
4
Chemical Science, Journal Year: 2024, Volume and Issue: 15(21), P. 8052 - 8061
Published: Jan. 1, 2024
Room temperature phosphorescence (RTP) materials are increasingly recognized for their superior luminescent properties, which pivotal in applications such as anti-counterfeiting, information storage, and optoelectronics. Despite this, the sensitivity of most RTP systems to humidity presents a significant challenge achieving durable performance aqueous environments. This study proposes strategy enhance organic room-temperature through racemization. By incorporating external racemates various chiral phosphors-NDBD-Ph, NDBD-Ph-Ph, NDBD-CH3, NDBD-O-CH3-into polyacrylonitrile (PAN) matrix, we significantly properties (quantum yield, lifetime, afterglow-time) resultant films. enhancement can be attributed increased density racemic molecules matrix spin-orbit coupling (SOC), facilitating development long-lasting polymer system water. Notably, rac-NDBD-Ph@PAN film exhibits persistent bright turquoise afterglow, even after immersion water month. Furthermore, first time, achieved an enhanced green cyan response pH variations under both acidic alkaline conditions (pH = 2-12), with maximum emission intensity increasing up threefold. The remarkable stability, reversible characteristics, this offer promising potential dynamic encryption
Language: Английский
Citations
4