Enhancing Purely Organic Room Temperature Phosphorescence via Supramolecular Self‐Assembly

Advanced Materials, Год журнала: 2024, Номер 36(18)

Опубликована: Янв. 25, 2024

Abstract Long‐lived and highly efficient room temperature phosphorescence (RTP) materials are in high demand for practical applications lighting display, security signboards, anti‐counterfeiting. Achieving RTP aqueous solutions, near‐infrared (NIR) emission, NIR‐excited crucial bio‐imaging, but these goals pose significant challenges. Supramolecular self‐assembly provides an effective strategy to address the above problems. This review focuses on recent advances enhancement of via supramolecular self‐assembly, covering four key aspects: small molecular cocrystals, macrocyclic hosts guests, multi‐stage self‐assembly. not only highlights progress areas also underscores prominent challenges associated with developing materials. The resulting strategies development high‐performance discussed, aiming satisfy biomedical science.

Язык: Английский

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Polymorphism‐Dependent Organic Room Temperature Phosphorescent Scintillation for X‐Ray Imaging

Advanced Materials, Год журнала: 2024, Номер 36(18)

Опубликована: Янв. 25, 2024

Abstract Organic phosphorescent scintillating materials have shown great potential for applications in radiography and radiation detection due to their efficient utilization of excitons. However, revealing the relationship between molecule stacking radioluminescence scintillators is still challenging. This study reports on two phenothiazine derivatives with polymorphism‐dependent phosphorescence radioluminescence. The experiments reveal that significantly affects non‐radiation decay triplet excitons scintillators, which further determines scintillation performance under X‐ray irradiation. These exhibit high radio stability a low limit 278 nGys −1 . Additionally, application these radiography, based excited properties, demonstrated. findings provide guideline obtaining high‐performance by shedding light effect crystal packing organic molecules.

Язык: Английский

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

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(45)

Опубликована: Сен. 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.

Язык: Английский

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Efficient Visible‐Light‐Activated Ultra‐Long Room‐Temperature Phosphorescence Triggered by Multi‐Esterification

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(52)

Опубликована: Ноя. 16, 2023

The development of ultra-long room-temperature phosphorescence (UL-RTP) in processable amorphous organic materials is highly desirable for applications flexible displays, anti-counterfeiting, and bio-imaging. However, achieving efficient UL-RTP from remains a challenging task, especially with activation by visible light bright afterglow. Here we report general rational molecular-design strategy to enable visible-light-excited multi-esterification rigid large-plane core. Notably, minimizes the aggregation-induced quenching accomplishes 'four birds one stone' possibility generation radiation process UL-RTP: i) shifting excitation ultraviolet blue-light through enhancing transition dipole moment low-lying singlet-states, ii) facilitating intersystem crossing incorporation lone-pair electrons, iii) boosting decay long-lived triplet excitons resulting significantly increased moment, iv) reducing intrinsic nonradiative substitution high-frequency vibrating hydrogen atoms. All these factors synergistically contribute most stable visible-light-stimulated (lifetime up 2.01 s efficiency 35.4 % upon at 450 nm) films using multi-esterified coronene, which allows high-tech single-component time-delayed white light-emitting diodes information technology based on flashlight-activated afterglow encryption.

Язык: Английский

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Förster Resonance Energy Transfer: Stimulus‐Responsive Purely Organic Room Temperature Phosphorescence through Dynamic B−N bond

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(20)

Опубликована: Фев. 28, 2024

Abstract Recently, stimulus‐responsive organic materials with room‐temperature phosphorescence (RTP) properties have attracted significant attention owing to their potential applications in chemical sensing, anticounterfeiting, and displays. However, molecular design currently lacks systematicity effectiveness. Herein, we report a capture‐release strategy for the construction of reversible RTP via B/N Lewis pairs. Specifically, acid 7‐bromo‐5,9‐dioxa‐13b‐boranaphtho[3,2,1‐de]anthracene (BrBA) can be deactivated through capturing by base, N , ‐diphenyl‐4‐(pyridin‐4‐yl)aniline (TPAPy), reactivated dissociation B−N bonds release BrBA. Reversible is attributed exceptional self‐assembly capability BrBA, whereas tunable colors are derived from distinct Förster resonance energy transfer (FRET) processes. The information storage anti‐counterfeiting were also experimentally validated. approach proposed this study offers an effective designing materials.

Язык: Английский

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Solid‐state room‐temperature phosphorescence activated by the end‐capping strategy of cyano groups

Aggregate, Год журнала: 2024, Номер unknown

Опубликована: Апрель 15, 2024

Abstract Avoiding the tedious process of crystal cultivation and directly obtaining organic crystals with desirable phosphorescent performance is great significance for studying their structure properties. Herein, a set benzophenone‐cored phosphors bright green afterglow are obtained on large scale through in‐situ generation via an end‐capping strategy to suppress non‐radiative triplet excitons reinforce intermolecular interactions. The ordered arrangement alkyl‐cyano groups as regulators crucial enhancement room‐temperature phosphorescence (RTP) emission, which has been further verified by attenuated lifetimes in isolated states formation inclusion complexes upon binding pillar[5]arenes. Moreover, hierarchical interactions phosphors, including hydrogen bonding, π‐π stacking interactions, van der Waals forces, quantified structures theoretical calculation deeply interpret origins RTP emission. With this study, we provide potential direct acquisition crystalline modulation RTP.

Язык: Английский

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Recent advance development in pillar[5]arene-based nanomaterials for cancer therapy

Chemical Communications, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

In this review, we summarize five different types of pillar[5]arene-based nanomaterials and their applications in chemotherapy, photodynamic therapy, photothermal multimodal synergistic therapy for tumors.

Язык: Английский

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A cucurbit[8]uril-based supramolecular phosphorescent assembly: cell imaging and sensing of amino acids in aqueous solution

Chinese Chemical Letters, Год журнала: 2024, Номер 35(12), С. 110022 - 110022

Опубликована: Май 17, 2024

Язык: Английский

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Visualization Detection of Ultralow Temperature Based on Flexible Cross–linked Polymer Systems

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 28, 2024

Abstract Ultralow temperature storage has sparked considerable attention with the development of economy, showing promising applications ranging from biomedical to national defense and other fields. However, ultralow detection is constrained by brittleness current materials at low temperatures complexity techniques. Consequently, challenge exists in finding efficient solutions material tolerance issues achieving rapid temperature. Herein, a novel flexible cross–linked polymer TPTA@PU film long afterglow, high phosphorescence quantum efficiency, excellent mechanical properties are successfully fabricated. Interestingly, obtained films demonstrate notable thermoresponsive behavior, afterglow color shifting rapidly blue green within ranges 80 280 K. Additionally, there positive linear correlation between RGB values corresponding Based on these prominent features, an sensor realized utilizing as elements. This work can be expected provide more inspiration possibilities for using RTP cutting‐edge field.

Язык: Английский

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Cavity-Shape-Dependent Divergent Chemical Reaction inside Aqueous Pd₆L₄ Cages

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(49), С. 26973 - 26982

Опубликована: Ноя. 29, 2023

Chemical reactions inside the confined pockets of enzyme-mimicking hosts, such as cages and macrocycles, have been an emerging field interest over past decade. Although many are known, use toward divergent synthesis nonisomeric products has not well explored. Divergent is a technique forming two or more distinct from same reagents by changing catalyst reaction conditions. Changing shape cage can also change nature magnitude host-guest interactions. Thus, it possible for changes to cause differences in pathways leading formation products? Herein, we report chemical transformation anthrone [anthracen-9(10H)-one] different water-soluble M6L4 cages. When was encapsulated newly synthesized octahedral 1, dimerized form dianthrone [9,9'-bianthracen-10,10'(9H,9'H)-dione]. In contrast, when performed double-square shaped 2, oxidized anthraquinone [anthracene-9,10-dione]. Similar results were obtained with set isomeric aqueous Pd6 3a (octahedral cage) 3b (double-square cage), indicating dependence cavity on synthesis. The present demonstrates unique example outcomes/results depending molecular container, which driven interactions preorganization substrates.

Язык: Английский

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