Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Journal Year: 2024, Volume and Issue: 325, P. 124986 - 124986
Published: Aug. 14, 2024
Language: Английский
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
Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: June 11, 2024
Comprehensive Summary Room‐temperature phosphorescence (RTP) materials have experienced rapid development due to their potential in organic light‐ emitting diode, information security, bioimaging, etc . However, the design of chiral phosphors with circularly polarized RTP (CPP) property remains a formidable challenge. Here, we introduce perturbation approach using combination binaphthol and phenoselenazine derivative achieve CPP. The photoactivated CPP polystyrene (PS) film demonstrates luminescence dissymmetry factor ( g lum ), emission efficiency, lifetime up 9.32 × 10 –3 , 27.0%, 40.0 ms, respectively. remarkable sensitivity PS oxygen temperature enables adjustable colors, ranging from green offwhite blue under varying conditions. doping systems, utilizing hosts triphenylphosphine 9‐phenylcarbazole, demonstrate an extended 85.9 ms exhibit persistent mechanoluminescence low pressure response threshold as 0.15 N. security provided by this material was attained via diverse colors afterglow generated distinct UV irradiation times host materials. Alternately, it can also be achieved observing different patterns R ‐ L ‐polarizer. research has presented reliable for producing high efficiency
Language: Английский
Citations
6
Science China Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 4, 2024
Language: Английский
Citations
5
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 25, 2024
Abstract Single luminophore enabling stimuli‐responsive dual‐emission characteristic has received considerable interest in recent years due to its special advantages advanced optical events. A large number of reports around the globe have involved dynamic or adjustable phenomenon (e.g., dual emission intensity ratio) single‐emitter based systems. However, a systematic overview summarizing underlying mechanisms, behaviors, and applications this topic is, so far, missing. To further promote development extend important role such kind materials diverse communities, review, latest advancements field single‐luminophore that exhibit characteristics are summarized. The discussion is centered on photophysical innovative design approaches, strategies for modulating properties, these This review anticipated provide new insights into distinctive organic luminescence community from perspective.
Language: Английский
Citations
4
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: 147(6), P. 5432 - 5439
Published: Jan. 31, 2025
It is always important and fascinating to explore new organic emitters that exploit unconventional pathways unveil their emission with unique properties, such as thermally activated delayed fluorescence (TADF). In this study, we report the rarely explored sulfur lone pair (n) a promising alternative, where correlated π* → n can be used attain strong TADF thus practical OLEDs. The designed strategy incorporates several key concepts (Figure 1a), in which persulfide aromatic spirocycle enhances spin-orbit coupling, thereby increasing intersystem crossing rate. Next, molecules twisted donor-acceptor configuration bridged by spiro[4.4]nonane well spatially orthogonal pairs features significantly reduce singlet-triplet gap. Finally, rigid spirocyclic backbone inhibits nonradiative transitions. proof-of-concept given compound 1, achieves nπ* (TADF) maximized at 635 nm photoluminescence quantum yields high 52% CH2Cl2. Wet-processed OLEDs containing 1 achieved maximum external efficiency of 6.4% brightness 189 cd m-2 (∼600 nm), opening an alternative 1nπ* route for
Language: Английский
Citations
0
Chemical Science, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
A single-molecular emitter Yn was developed, exhibiting aqueous tunable up-conversion RTP/fluorescence dual emission and excellent biocompatibility for two-photon time-resolved imaging ratiometric temperature sensing.
Language: Английский
Citations
0
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: March 18, 2025
The simultaneous generation and stabilization of triplet excitons are the key to realizing efficient organic room temperature phosphorescence (RTP), which is challenging owing obscure mechanism structure-property relationships. Herein, a strategy lone-pair-mediated multiple through-space interactions (TSIs) proposed availably induce RTP. By incorporating heteroatoms facilitate n-n n-π interactions, lone pairs delocalized throughout structure, resulting in dense splitting excited-state energy levels. Thus, more matched levels with small gap between singlet states (ΔEST) emerge, intersystem crossing (ISC) transition channels that assist generation. strong TSIs also effectively rigidify molecular structures thus stabilize for radiation. Furthermore, manipulation TSI intensity allows efficiency enhancement, persistent time prolongation, tolerance high temperatures This work not only explores fundamental principle RTP from new view but provides universal ISC promotion triple stabilization.
Language: Английский
Citations
0
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: April 28, 2025
Arylene diimides represent a versatile class of n-type organic semiconductors, widely recognized for tunable photophysical properties, making them highly relevant across various optoelectronic applications. While their fluorescence can be finely modulated through core substitution, triplet-state emission has received comparatively little attention. This is particularly surprising given the growing field ambient-organic triplet harvesting materials, such as thermally activated delayed and phosphorescent systems, which would greatly benefit from structural modifications to π-conjugated backbone substitution arylene achieve desired properties. Realizing states within family molecules crucial advancing triplet-based materials applications in lighting, photocatalysis, beyond. In this context, we present an unprecedented study demonstrating pyromellitic diimides, smallest member diimide family, with accessible emissive state due narrow singlet-triplet energy gap. Herein, report synthesis series core-substituted (cPmDIs) using diverse synthetic strategies. Core not only induces wide spectrum colors but, notably, enables wide-range phosphorescence spanning visible spectrum, depending on substituent. article details electrochemical characterization library cPmDIs, supported by theory. Furthermore, demonstrate potential molecular design achieving ambient-orange phosphorescence, exemplified thiophenyl-cPmDI derivative, exhibits crystalline film minimizing vibrational dissipation. regard, envision that represents significant step toward predictive structure-property phosphors materials.
Language: Английский
Citations
0
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154274 - 154274
Published: July 25, 2024
Language: Английский
Citations
3
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(1)
Published: Sept. 7, 2024
Smart materials enabling emission intensity or wavelength tuning by light stimulus have attracted attention in cutting-edge fields. However, due to the general limitation of dense molecular stacking (in solid states, especially crystals) on photoresponsivity, constructing rapidly phototunable solid-state luminescent systems remains challenging. Herein, we present a new luminophore that serves as both photoresponsive and luminous group with enhanced conformational freedom attain this goal, namely, relying photoexcitation-induced change an ionized persulfurated arene based weak intermolecular aliphatic C-H⋅⋅⋅π interaction. Together phosphorescence characteristic molecule itself, upon irradiation can be observed series phase like solution state, crystal, amorphous high rate 0.033 s
Language: Английский
Citations
3