Long Persistent Luminescence from Metal–Organic Compounds: State of the Art

Advanced Functional Materials, Год журнала: 2023, Номер 33(19)

Опубликована: Март 18, 2023

Abstract The excited‐state tuning of luminescent metal–organic compounds has made great progress in the fields optical imaging, photocatalysis, photodynamic therapy, light‐emitting devices, sensors, and so on. Although with high luminescence efficiency can be realized via enhanced molecular rigidity heavy‐atom effect, their corresponding lifetimes are still limited on order a nanosecond to millisecond, owing inherent competition between luminous lifetime. Therefore, advanced applications (i.e., persistent afterglow information security, anti‐counterfeiting, smart materials, among others) related long (LPL, typically lifetime larger than millisecond) seriously hindered. This review gives timely systematic summary for realizing room‐temperature phosphorescence (RTP)‐type thermally activated delayed fluorescence (TADF)‐type LPL during last few years. Particularly, based perspectives time, space, energy dimensions, fundamental materials design coordination assembly systematically described first time. Moreover, internal external factors influencing properties terms efficiency, lifetime, color illustrated. Last but not least, challenges also discussed developing from compounds.

Язык: Английский

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Full‐Color Long‐Lived Room Temperature Phosphorescence in Aqueous Environment

Small, Год журнала: 2022, Номер 18(19)

Опубликована: Апрель 4, 2022

Long-lived room temperature phosphorescence (RTP) materials are widely utilized in the field of biological and chemical sensing, due to their unique characteristics long-lived luminescence no background autofluorescence. However, realization full-color RTP aqueous solution still remains a great challenge. Herein, feasible strategy for achieving high stability carbon dots (CDs)-based composite environment is reported by constructing rigid hydrogen bonds' network. The obtained m,p-CDs@CA exhibit deep-blue with quantum yield 23.2% lifetime 1.74 s, afterglow can last over 12 s. More importantly, desirable detection biomarkers, because excellent stability, dispersion, properties. suspension also displays sensitivity, limitation as low 5.61 550 nm biomarkers 5-hydroxyindole-3-acetic acid (HIAA) serotonin (5-hydroxytryptamine, HT), respectively. Meanwhile, sensing performance exhibits selectivity even presence other competitive species blood plasma urine. With superior selectivity, probe based on be an effective biomarker carcinoid identification, which has potential application clinical analysis.

Язык: Английский

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Ultra‐Sensitive, Selective and Repeatable Fluorescence Sensor for Methanol Based on a Highly Emissive 0D Hybrid Lead‐Free Perovskite

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(35)

Опубликована: Июнь 7, 2022

A convenient and rapid detection method for methanol in ethanol remains a major challenge due to their indistinguishable physical properties. Herein, novel fluorescence probe based on perovskite was successfully designed overcome this bottleneck. We report new zero-dimensional (0D) hybrid of [MP]2 Inx Sb1-x Cl7 ⋅ 6 H2 O (MP=2-methylpiperazine) displaying an unusual green light emission with near-unity photoluminescence quantum yield. Remarkably, 0D exhibits reversible methanol-response luminescence switching between yellow color but fail any other organic vapors. Even blended alcohol solutions, the luminescent excellent sensing performance multiple superiorities response time (30 s) ultra-low limit (40 ppm), etc. Therefore, can be utilized as perfect detect traces from ultrahigh sensitivity, selectivity repeatability. To best our knowledge, work represents first wide potential environmental monitoring detection,

Язык: Английский

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Single‐Component 0D Metal–Organic Halides with Color‐Variable Long‐Afterglow toward Multi‐Level Information Security and White‐Light LED

Advanced Functional Materials, Год журнала: 2023, Номер 33(18)

Опубликована: Фев. 7, 2023

Abstract The optical anti‐counterfeiting science and technology are currently restricted by the limited information loading capacity, thus development of multi‐level high‐security systems is urgently needed but still challenging. Herein, design strategies (including ASCII/5D codes dynamic storage) reported incorporation abundant multi‐central luminescence time‐resolved, excitation‐dependent ultralong phosphorescence. Self‐assembly new single‐component 0D organic–inorganic metal halides (OIMHs) facilely achieved, which exhibit divisible all‐phosphorescence, thermally activated delayed fluorescence, single‐molecule white‐light emission, as proved experiments theoretical calculations. Interestingly, combing advantages both inorganic cluster π‐conjugation in OIMHs, time‐dependent afterglow affords color‐variable emission a wide wavelength range larger than 100 nm, providing extra color‐time dimensions for encryption compared to traditional single‐color fluorescent anti‐counterfeiting. Moreover, white light‐emitting diode device further developed show high lighting ability OIMH. Therefore, this study paves an effective way fabricate cluster‐based hybrids equipping different emitters confer diverse photoluminescence manners satisfy down‐to‐earth application requirements.

Язык: Английский

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Excited-state intramolecular proton transfer (ESIPT)-based fluorescent probes for biomarker detection: design, mechanism, and application

Chemical Communications, Год журнала: 2023, Номер 59(15), С. 2056 - 2071

Опубликована: Янв. 1, 2023

Biomarkers are essential in biology, physiology, and pharmacology; thus, their detection is of extensive importance.

Язык: Английский

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Tough, Reprocessable, and Recyclable Dynamic Covalent Polymers with Ultrastable Long‐Lived Room‐Temperature Phosphorescence

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(22)

Опубликована: Март 30, 2023

Room-temperature phosphorescence (RTP) polymers, whose emission can persist for a long period after photoexcitation, are of great importance practical applications. Herein, dynamic covalent boronic ester linkages with internal B-N coordination incorporated into commercial epoxy matrix. The reversible dissociation bonds upon loading provides an efficient energy dissipation pathway the network, while rigid matrix inhibit quenching triplet excitons in esters. obtained polymers exhibit enhanced mechanical toughness (12.26 MJ m-3 ), ultralong RTP (τ=540.4 ms), and shape memory behavior. Notably, there is no apparent decrease property prolonged immersion various solvents because networks robust. Moreover, endow superior reprocessablity recyclability. These novel properties have led to their potential application information encryption anti-counterfeiting.

Язык: Английский

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Modulation of Deep-Red to Near-Infrared Room-Temperature Charge-Transfer Phosphorescence of Crystalline “Pyrene Box” Cages by Coupled Ion/Guest Structural Self-Assembly

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(4), С. 2484 - 2493

Опубликована: Янв. 17, 2024

Organic cocrystals obtained from multicomponent self-assembly have garnered considerable attention due to their distinct phosphorescence properties and broad applications. Yet, there been limited reports on cocrystal systems that showcase efficient deep-red near-infrared (NIR) charge-transfer (CT) phosphorescence. Furthermore, effective strategies modulate the emission pathways of both fluorescence remain underexplored. In this work, we dedicated our work four self-assembled called "pyrene box" cages using 1,3,6,8-pyrenetetrasulfonate anions (PTS4–), 4-iodoaniline (1), guanidinium (G+), diaminoguanidinium (A2G+), hydrated K+ countercations. The binding such cations PTS4– platforms adaptively modulates supramolecular stacking with guest molecules 1, allowing steer pathways. Notably, confinement molecule 1 within PTSK{1} PTSG{1} leads an NIR CT emission. addition fuming gases like triethylamine HCl allows reversible pH modulations binding, which in turn induce a transition cage between states. This capability was further illustrated through proof-of-concept demonstration shrimp freshness detection. Our findings not only lay foundation for future designs leveraging weak intermolecular host–guest interactions engineer excited states interacting chromophores but also broaden prospective applications room-temperature materials food safety

Язык: Английский

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High‐Temperature and Dynamic RGB (Red‐Green‐Blue) Long‐Persistent Luminescence in an Anti‐Kasha Organic Compound

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(32)

Опубликована: Июнь 6, 2022

Organic LPL (long-persistent luminescence) materials have sparked extensive research interest due to the ultralong-lived triplet states. Although numerous organic been reported, most of emission was static and monotonous. Therefore, with dynamic are urgently required. A triamino-s-triazine derivative 1 fabricated. The single-crystal structure shows that abundant intermolecular interactions small free volume restrict molecular motion avoid quenchers. Spectral theoretical calculations upheld existence multiple excited states in 1, migration electrons between is very sensitive external stimuli. By modulating stimulus, residence different can be manipulated achieve RGB LPL. Importantly, blue achieved by manipulating anti-Kasha emission. And red still observed at high temperature.

Язык: Английский

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Peroxide-mediated selective conversion of biomass polysaccharides over high entropy sulfides via solar energy catalysis

Energy & Environmental Science, Год журнала: 2023, Номер 16(4), С. 1531 - 1539

Опубликована: Янв. 1, 2023

Biomass polysaccharides are converted over novel high-entropy sulfides (CdZnCuCoFe)S x under mild reaction conditions via solar energy catalysis. A large amount of carbon monoxide (CO) was produced at 1.73 mmol g −1 h with a high selectivity 99.1% among the gas products.

Язык: Английский

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Host Surface-Induced Excitation Wavelength-Dependent Organic Afterglow

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(24), С. 13392 - 13399

Опубликована: Июнь 8, 2023

The design and construction of organic afterglow materials is an attractive but formidably challenging task due to the low intersystem crossing efficiency nonradiative decay. Here, we developed a host surface-induced strategy achieve excitation wavelength-dependent (Ex-De) emission through facile dropping process. prepared PCz@dimethyl terephthalate (DTT)@paper system exhibits room-temperature phosphorescence afterglow, with lifetime up 1077.1 ± 15 ms duration time exceeding 6 s under ambient conditions. Furthermore, can switch on off by adjusting wavelength below or above 300 nm, showing remarkable Ex-De behavior. Spectral analysis demonstrated that originates from PCz@DTT assemblies. stepwise preparation process detailed experiments (XRD, 1H NMR, FT-IR analysis) proved presence strong intermolecular interactions between carbonyl groups surface DTT entire frame PCz, which inhibit processes PCz emission. Theoretical calculations further manifested geometry alteration different beams main reason for afterglow. This work discloses effective constructing smart systems be fully exploited in range fields.

Язык: Английский

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