Recent advances in the design of afterglow materials: mechanisms, structural regulation strategies and applications

Chemical Society Reviews, Год журнала: 2023, Номер 52(22), С. 8005 - 8058

Опубликована: Янв. 1, 2023

Afterglow materials have attracted widespread attention owing to their distinctive and long-lived optical emission properties which create exciting opportunities in various fields.

Язык: Английский

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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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Circularly polarized luminescence of agglomerate emitters

Aggregate, Год журнала: 2021, Номер 2(5)

Опубликована: Май 3, 2021

Abstract Circularly polarized luminescence (CPL) originates from the chiral emissive excited states. CPL materials have promising applications in 3D optical displays, encryptions, biological probes, photoelectric devices, and switches, most of which require excellent performances including bright high dissymmetry factor ( g lum ) agglomerate state. This review systematically summarizes progress about aggregate solid materials, such as organic metal‐organic (such coordination polymers, organic‐inorganic metal halides, clusters, cluster‐assembled materials), assembled by supramolecular interactions, liquid crystals. We also present current challenges a future perspective emitting materials.

Язык: Английский

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Highly Efficient and Direct Ultralong All‐Phosphorescence from Metal–Organic Framework Photonic Glasses

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(39)

Опубликована: Июль 12, 2022

Realizing efficient and ultralong room-temperature phosphorescence (RTP) is highly desirable but remains a challenge due to the inherent competition between excited state lifetime photoluminescence quantum yield (PLQY). Herein, we report bottom-up self-assembly of transparent metal-organic framework (MOF) bulk glasses exhibiting direct all-phosphorescence (lifetime: 630.15 ms) with PLQY up 75 % at ambient conditions. These macroscopic MOF have high Young's modulus hardness, which provide rigid environment reduce non-radiative transitions boost triplet excitons. Spectral technologies theoretical calculations demonstrate directly derived from different states, indicating great capability for color-tunable afterglow emission. We further developed information storage light-emitting devices based on pure RTP fabricated photonic glasses.

Язык: Английский

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Metal-organic materials with circularly polarized luminescence

Coordination Chemistry Reviews, Год журнала: 2022, Номер 468, С. 214640 - 214640

Опубликована: Июнь 2, 2022

Язык: Английский

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Frontiers in Circularly Polarized Phosphorescent Materials

Advanced Functional Materials, Год журнала: 2023, Номер 33(20)

Опубликована: Фев. 20, 2023

Abstract Circularly polarized luminescence (CPL) materials have received increasing attention in recent years. Amongst various CPL materials, circularly phosphorescence (CPP) featuring long life‐time represent a novel research frontier and exhibit promising applications fields. Herein, the state‐of‐the‐art advances of CPP are systematically summarized, as classified into transition metal complexes, organic small molecules, polymers, organic/inorganic hybrid materials. Besides, light‐emitting diodes encryption display also summarized. Furthermore, current challenges future perspectives put forward. It is expected that this review will offer more inspirations for rational design advanced thus further promoting their practical applications.

Язык: Английский

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Nanoporous {Y₂}-Organic Frameworks for Excellent Catalytic Performance on the Cycloaddition Reaction of Epoxides with CO₂ and Deacetalization–Knoevenagel Condensation

ACS Applied Materials & Interfaces, Год журнала: 2022, Номер 14(16), С. 18589 - 18599

Опубликована: Апрель 13, 2022

Stable metal-organic frameworks containing periodically arranged nanosized pores and active Lewis acid-base sites are considered as ideal candidates for efficient heterogeneous catalysis. Herein, the exquisite combination of [Y2(CO2)7(H2O)2] cluster (abbreviated {Y2}) multifunctional linker 2,4,6-tri(2,4-dicarboxyphenyl)pyridine (H6TDP) led to a nanoporous framework {[Y2(TDP)(H2O)2]·5H2O·4DMF}n (NUC-53, NUC = North University China), which is rarely reported binuclear three-dimensional (3D) with hierarchical tetragonal-microporous (0.78 nm) octagonal-nanoporous (1.75 channels. The inner walls these channels aligned by {Y2} clusters plentifully coexisted YIII ions Npyridine atoms. Furthermore, NUC-53 has quite large void volume ∼65.2%, significantly higher than most documented 3D rare-earth-based MOFs. performed catalytic experiments exhibited that activated showed high activity on cycloaddition reactions CO2 styrene oxide under mild conditions excellent turnover number (TON: 1980) frequency (TOF: 495 h-1). Moreover, deacetalization-Knoevenagel condensation benzaldehyde dimethyl acetal malononitrile could be efficiently prompted catalyst NUC-53. These findings not only pave way construction MOF based rare-earth variety activities but also provide some new insights into mechanism.

Язык: Английский

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Encapsulating Organic Dyes in Metal–Organic Frameworks for Color-Tunable and High-Efficiency White-Light-Emitting Properties

Inorganic Chemistry, Год журнала: 2022, Номер 61(51), С. 21107 - 21114

Опубликована: Дек. 16, 2022

The design of white-light phosphor is highly desirable for practical applications in SSL (solid-state lighting) and its related fields. Dye-loaded metal-organic frameworks (MOFs) have been widely demonstrated as one type promising down conversion materials WLEDs (white-light-emitting diodes), but two issues (dye leakage inadequate quantum efficiency) require to be addressed before possible applications. Here, a series single-phase dyes@In-MOF phosphors prepared different ways: the in-situ process soaking method. study these confirms importance this that could effectively increase dye loading efficiency greatly decrease leakage. As result, perfect WLED, fabricated using in-situ-synthesized (AF/RhB@In-MOF)-3 (AF: Acriflavine; RhB: Rhodamine B) 450 nm blue LED chip, exhibited very high yield (QY, up 42.27%), luminous efficacy (LE) 50.75 lm/W, color rendering index (CRI) 91.2, nearly identical Commission International ed'Eclairage (CIE) coordinates (0.33,0.31), indicating potential application dye-loaded MOFs with good quality smart white LEDs.

Язык: Английский

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Circularly polarized luminescence of coordination aggregates

Aggregate, Год журнала: 2022, Номер 3(5)

Опубликована: Фев. 11, 2022

Abstract The development and applications of materials with efficient circularly polarized luminescence (CPL) have become an interdisciplinary frontier research topic. We summarize herein the recent advance in CPL‐active aggregates based on metal‐ligand coordination (termed as “coordination aggregates”). surveyed are classified small‐molecular metal complexes, which include monocomponent assemblies Pt(II) complexes other binary helicates, polymers, frameworks. efforts improving dissymmetry factors quantum yields these use aggregation strategy enhancing performance isolated molecules discussed. chiral organic light‐emitting diodes (OLEDs) solution‐ or evaporation‐processed procedures surveyed. In addition, uses lanthanide CPL‐contrast imaging CPL probes highlighted. common discussion mechanism aggregation‐enhanced CPLs a perspective future works finally given.

Язык: Английский

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Helically Chiral Hybrid Cyclodextrin Metal–Organic Framework Exhibiting Circularly Polarized Luminescence

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(21), С. 9380 - 9389

Опубликована: Май 20, 2022

Three achiral polycyclic aromatic fluorophores─namely, 1-pyrenecarboxylic acid, 9-anthracenecarboxylic and perylene-3,9-dicarboxylic acid─were chosen based on their desired properties before being incorporated into the construction of a K+-carrying gamma-cyclodextrin (γ-CD)-based metal–organic framework (CD-MOF-1) γ-CD-containing hybrid frameworks (CD-HFs). Among these fluorophores, only pyrene-carrying one shows significant noncovalent bonding interactions with γ-CD in solution. This fluorophore is encapsulated CD-HF trigonal superstructure instead common cubic CD-MOF-1 found case other two fluorophores. Single-crystal X-ray diffraction analysis reveals π-stacked chiral positioning inside (γ-CD)2 tunnels held uniformly around an enantiomorphous 32 screw axis along c direction solid-state structure. helix-like structure demonstrates additional level chirality over above point-chiral stereogenic centers axial associated self-assembled These arrangements result specifically generated photophysical chiroptical properties, such as controlled emergence circularly polarized luminescence (CPL) emission. In this manner, complete understanding mechanism transfer from host (CD-HF) to has been achieved, attribute which often missing development materials CPL.

Язык: Английский

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