Sub‐Nanometer Porous Carbon Materials for High‐Performance Supercapacitors Using Carbon Dots as Self‐templated Pore‐Makers

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 26, 2024

Abstract Customizable porous carbon structures are critical for high‐performance electrode materials, and the modulation of pore parameters at different levels remains a great challenge. For supercapacitors, preferred materials should own high specific capacitance, nice rate performance, large density, low self‐discharge, mass‐loading, which could be accomplished by sub‐nanometer pores (0.5–1.0 nm). Herein, new method using dots (CDs) as self‐templates is reported to produce with uniform diameters 0.64–0.80 nm. As result, optimal sample packing density (0.81 g cm −3 ) displays outstanding capacitances (gravimetric 515.5 F −1 , areal 5.16 −2 volumetric 417.6 respectively 1 A commercial‐level mass‐loading 10 mg . The assembled high‐loading symmetric supercapacitor shows energy 22.3 Wh kg 3500 W well long cycle stability (99.9% retention after 000 cycles 2 in an ultrawide voltage range 1.4 V aqueous electrolytes. This work suggests micropore‐forming strategy carbon, can applied batteries, filters, adsorbents, catalysts.

Язык: Английский

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Preparation and application of carbon dots@cyanuric acid composites with aggregation-induced emission effect

Journal of Luminescence, Год журнала: 2025, Номер unknown, С. 121063 - 121063

Опубликована: Янв. 1, 2025

Язык: Английский

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Efficient room temperature afterglow in nitrogen doped carbon dots triggered by steric hindrance effect

Journal of Luminescence, Год журнала: 2025, Номер unknown, С. 121100 - 121100

Опубликована: Янв. 1, 2025

Язык: Английский

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Abnormal Slow Phonon Dynamics Toward Prolonging Excited States Dynamics Enabled by Crystalline‐Assembling Donor–Acceptor Molecules

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract Phonon dynamics are a critical factor to control the optical properties of excited states in light‐emitting materials. Here, we report an extremely slow relaxation photoexcited lattice vibrations enabled by assembling donor‐acceptor (D–A) molecules [2‐(9,9‐dimethylacridin‐10(9H)‐yl)‐9,9‐dimethyl‐9H‐thioxanthene 10,10‐dioxide], namely AC molecules, into dipolar crystal. By using photoexcitation‐modulated Raman spectroscopy, find that crystalline‐lattice monitored Raman‐scattering laser beam 785 nm demonstrate un‐usual time scale seconds after ceasing photoexcitation 343 such This presents phonon crystalline‐assembling D–A Simultaneously, photoluminescence (PL) exhibits prolonged behavior, lasting 10 ms phenomenon provides experimental hypothesis function as important mechanism unusually prolong upon can be verified directly suppressing through freezing molecular liquid crystalline solid at 77 K largely PL 1 s‐ removing photoexcitation. Clearly, provide necessary conditions enable toward prolonging dynamics.

Язык: Английский

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Highly Bright Pure Room Temperature Phosphorescence for Circularly Polarized Organic Hyperafterglow

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract Pure room‐temperature phosphorescence (pRTP) promises great advantages in both exciton utilization and lifetime manipulation over existing organic luminophores for a variety of emerging applications, but the low brightness, efficiency, color purity constrain afterglow luminescence significantly. Here, promising approach to design highly bright, efficient, narrowband pRTP with long‐lifetime hyperafterglow is proposed by isolating conjugated energy donor circularly polarized (CP) acceptor multi‐resonance effect into rigid host. It shown that aggregation chiral P‐containing binaphthyl promotes generation CP‐pRTP high brightness up ≈50 cd m −2 , while simultaneous transfer chirality afford multi‐color photoluminescence efficiency ≈90%, full‐width at half maxima 31–39 nm, 120–770 ms, luminescent dissymmetry ≈10 −3 . Also, excellent stability capable resisting quenching effects oxygen, solvents, aqueous solutions strong acids bases are observed. With these advantages, applications information encryption, grayscale imaging, 3D high‐resolution models realized, promoting significantly fundamental understandings on modulation construction high‐performance materials advanced photophysical properties applications.

Язык: Английский

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Ultralong Room Temperature Phosphorescence through Both Space Confinement and Long-Range Charge Migration

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Март 12, 2025

Doping guest materials into host with a confined space to suppress nonradiative decay is an effective strategy for achieving room-temperature phosphorescence (RTP). However, constructing host–guest doped ultralong RTP (URTP) still challenging. Herein, by embedding three coumarin derivatives boric acid via one-step heat treatment, the URTP material afterglow lasting up 60 s, lifetime of 1.59 and quantum yield 18.14% was successfully prepared. Experimental results show that dense 3D boron oxide network formed after along B–O covalent bonds O→B coordination between guest, effectively suppresses transitions through both physical chemical confinement. More importantly, oxygen vacancy defects in during combined charge-separated states generated molecules upon irradiation, together facilitated long-range charge migration process. In addition, recombination accompanied long-lived emission. Finally, prepared exhibit potential applications encryption decryption information security fields.

Язык: Английский

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Achieving Room-Temperature Phosphorescence of Coumarin Derivatives by Hydrogen-Bonding Networks and Multicolor Superfluorescence by Resonance Energy Transfer

Dyes and Pigments, Год журнала: 2025, Номер unknown, С. 112765 - 112765

Опубликована: Апрель 1, 2025

Язык: Английский

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Lignin-derived carbon dots with molten salt confinement for ultra-stable room-temperature phosphorescence

International Journal of Biological Macromolecules, Год журнала: 2025, Номер 310, С. 143180 - 143180

Опубликована: Апрель 15, 2025

Язык: Английский

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Aqueous/Chemical‐Resistant Organic Room Temperature Phosphorescence Materials From Siloxane Network Reinforcement

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 28, 2025

Abstract Organic room‐temperature phosphorescent(RTP) materials typically exhibit superior luminescent properties, yet their instability, particularly in aqueous environments where phosphorescence is quenched, and under acidic, alkaline, or organic solvent conditions, restricts application. Herein, a novel convenient strategy designed for constructing host–guest RTP by incorporating silane into urea‐derived products to form siloxane network‐strengthened stable host matrix. The possesses excellent chemical stability can be combined with the thermolytic of urea through covalent bonds, enhancing resistance host. connects guest molecules bonds hydrogen restricting non‐radiative loss, phosphorescent emission, protecting from quenching multiple environments. material, prepared using (3‐aminopropyl) triethoxysilane, urea, 2‐aminoterephthalic acid, exhibits blue lifetime 891 ms, visible naked eye 21 s. Notably, it maintains emission water, solvents, strong acid/alkali solutions while demonstrating stability, as evidenced its potential applications afterglow displays information encryption. This provides valuable insights designing broadens application complex

Язык: Английский

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Controlling the Afterglow of Carbon Dot Composite Materials Through pH Value and the Application in Information Encryption

Laser & Photonics Review, Год журнала: 2025, Номер unknown

Опубликована: Май 29, 2025

Abstract Phosphorescence (Phos) materials with tunable delay time can provide more modes of anti‐counterfeiting and information encryption. Carbon dots (CDs), a novel nanomaterial, exhibit remarkable optical properties potential. Matrix assistance is an effective method to realize CDs delayed emission. Here, new composite material (AB‐CDs) prepared using biuret 2,4,6‐Triphenylboroxin by hydrothermal treatment, which achieves fluorescence (FL) emission at 296 nm Phos 456 under 260 excitation. Under 365 excitation, luminescence peaked be observed the naked eye for up 5 s. By utilizing various spectra analysis, origin investigated, revealing mechanism AB‐CDs energy transfer (ET) process between matrix CDs. Simultaneously, from 2 7 s obtained different pH. also maintain high stable lifetime intensity same pH over 300 h, demonstrating reversible cycling value 3 11. Based on unique characteristic AB‐CDs, it shows potential applications in anti‐counterfeiting, encryption recyclable test.

Язык: Английский

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