Related references
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Article
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Summary: This study proposes a facile in situ confining strategy to prepare full-color phosphorescent carbon dots (CDs) through rapid microwave-assisted carbonization. The obtained CDs exhibit tunable phosphorescence wavelengths and alterable lifetimes by adjusting the mass ratio of the starting materials. Theoretical calculations and experimental results reveal that the formation of high-density ionic bonds and the evolution of the aggregation state of CDs play important roles in the phosphorescence characteristics.
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Summary: This study successfully developed a time-dependent polychrome stereoscopic luminescence system by designing a luminescence system with adjustable afterglow lifetime and multicolor quantum dots. The system allows tunable afterglow emission and has been applied in time-space division multiplexing, expanding the information capacity.
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(2023)
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Zhijiang Song et al.
Summary: High-efficiency blue room-temperature phosphorescent carbon dots with a high phosphorescence quantum efficiency of 50.17% and a long lifetime of 2.03s were designed and constructed using a simple molecular engineering strategy. These carbon dots were used as triplet donors to fabricate green, red, and white afterglow composites via effective phosphorescence Forster resonance energy transfer. The color temperature of the white afterglow emission can be widely and easily tuned from cool white to warm white.
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(2023)
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Lin Ai et al.
Summary: Carbon dots (CDs) with color-tunable solid-state fluorescence (SSF) were obtained through surface ligand modulation, enabling emission wavelengths to be switched smoothly by altering conjugation ability. Three-dimensional printing was used to create a range of emissive objects, demonstrating the commercial potential for use in optical lamps.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
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Xiaolin Liu et al.
Summary: Charged organic molecules play a crucial role in natural living systems and have significant potential for biomimicry and functional materials. This Account summarizes the progress of charged aggregation-induced emission (AIE) systems, including design strategies, unique properties, and applications in imaging, therapy, and other fields.
ACCOUNTS OF CHEMICAL RESEARCH
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Faxu Lin et al.
Summary: This study presents a universal strategy to combine infrared persistent luminescent materials with red and near-infrared dyes through stepwise Förster resonance energy transfer (FRET), solving the issue of inadequate spectral overlap.
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(2022)
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Luka Dordevic et al.
Summary: This review focuses on the importance of photoluminescent carbon nanoparticles, or carbon dots, for biomedical and energy applications. These nanomaterials exhibit tunable light emission, dispersibility, and low toxicity, making them highly attractive for various purposes. The review discusses how chemical tools can impact the properties of carbon dots and presents synthetic strategies for functionalizing these nanomaterials. Examples are provided to illustrate the correlation between structure, composition, and function, offering insights into the future development of carbon dots.
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Jinyang Zhu et al.
Summary: This study demonstrates the realization of white-light room-temperature long-lived afterglow emission from CD powder, with a synergy between the phosphorescence of the carbon core and the delayed fluorescence associated with surface C(sic)N moieties. By matching the singlet state of the surface groups of CDs with the long-lived triplet state of the carbon core, an efficient energy transfer is achieved.
Article
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Hui Li et al.
Summary: The authors developed a strategy to achieve multicolor circularly polarized organic afterglow (CPOA) by inserting a chirality center into a non-conjugated organic cluster. This approach enabled highly efficient and significantly tuned CPOA emissions from blue to yellowish-green with dissymmetry factor over 2.3 x 10(-3) and lifetime up to 587 ms under different excitation wavelengths, showcasing the potential for diverse applications in CPL and RTP materials.
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Fuming Xiao et al.
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(2022)
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Jianliang Bai et al.
Summary: A simple strategy using hydrogen bonds to manipulate the nanostructure of carbon dots has been proposed, resulting in a variety of attractive properties, including unique fluorescence phenomena. This enriches the understanding of CDs by illustrating the relationship between fluorescence behaviors and dispersion states.
Article
Chemistry, Multidisciplinary
Qing Cao et al.
Summary: In this study, triplet excitons in carbon nanodots (CNDs) are brightened by embedding them into poly(vinyl alcohol) (PVA) films, resulting in flexible multicolor phosphorescence films. PVA chains isolate the CNDs, reducing triplet exciton quenching, and hydrogen bonds between CNDs and PVA protect triplet excitons from nonradiative recombination.
Article
Optics
Songyuan Tao et al.
Summary: In this study, the confined-domain crosslink-enhanced emission (CEE) effect in carbonized polymer dots (CPDs) was investigated, providing insights into the structure and luminescence properties of CPDs. The findings are of general significance for the further development of CPDs with tailored properties.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Optics
Kai Jiang et al.
Summary: The first organic long persistent luminescence (OLPL) system based on carbon dots (CDs) with a duration of over 1 hour has been developed. The CDs-based system, named m-CDs@CA, can be easily fabricated using a household microwave oven and exhibits long persistent luminescence under ambient conditions and even in aqueous media. The successful composition of CDs and CA, the formation of exciplexes and long-lived charged-separated states were confirmed by various characterizations. Covalent bond formation between CA and CDs was found to play a key role in activating long persistent luminescence and preventing its quenching from oxygen and water. This work provides new insights for the development of rare-earth-free and robust OLPL materials.
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(2022)
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Shi-Yu Song et al.
Summary: This study achieved UV phosphorescent carbon nanodots (CNDs) by decreasing conjugation size and in-situ spatial confinement in a NaCNO crystal. The phosphorescence wavelength of the CNDs can be tuned by further tailoring the size, and their high-energy photons can be used to inactivate bacteria effectively.
LIGHT-SCIENCE & APPLICATIONS
(2022)
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Xin Yang et al.
Summary: This study investigates the synthesis and emission mechanism of red-emissive carbon dots (R-CDs). Different R-CDs were successfully synthesized using non-aromatic precursors such as citric acid with the assistance of ammonia. The addition of ammonia played a key role in the synthesis process, shifting the emission wavelength of the carbon dots. Mass spectrometry analysis and computational modeling revealed the emission mechanism, providing guidance for the controlled synthesis of R-CDs from other non-aromatic precursors.
Review
Chemistry, Multidisciplinary
Ziliang Chen et al.
Summary: Carbon dots (CDs) are a new type of carbon-based functional material that have attracted much interest due to their tunable structure and composition, as well as their rich photoelectrochemical properties. They show great potential in various applications such as biology, catalysis, sensors, and energy storage. However, the understanding of CDs is still limited due to their inherent complexity, which requires expertise from organic chemistry, materials science, and solid state physics. Discovering appealing properties, elucidating fundamental factors that affect the properties, and proposing effective engineering strategies are highly pursued by researchers. This Account provides an introduction to the features and properties of CDs, as well as discussing analysis techniques and regulation strategies for tailored applications. The challenges and future directions in CD research are also discussed.
ACCOUNTS OF CHEMICAL RESEARCH
(2022)
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Chemistry, Multidisciplinary
Qijun Li et al.
Summary: A new strategy is reported for the preparation of high-efficiency and strong room-temperature phosphorescence materials through grinding-induced transformation. The method achieves uniform embedding of carbon dots in boron acid crystals, resulting in enhanced phosphorescence.
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Chemistry, Multidisciplinary
Boyang Wang et al.
Summary: There is a growing interest in finding alternative materials with room-temperature phosphorescence (RTP) for various applications. Carbon dots (CDs) are found to possess the desired characteristics, and their RTP mechanism has been investigated in this study. By crosslinking and coating the CDs, their RTP properties can be enhanced. A design rule has also been proposed to tune the quantum yields and RTP lifetime of CDs. This finding provides a flexible route for developing CDs with tailored RTP properties.
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Huixian Shi et al.
Summary: A new type of full-color-tunable ultralong phosphorescence carbon dots without matrix-assistance have been reported, which have potential applications in information encryption, light detection, and LED devices.
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Ya-Chuan Liang et al.
Summary: Water-soluble red afterglow imaging agents based on ecofriendly nanomaterials have been developed, utilizing CNDs and RhB to create a CNDs-RhB@silica nanocomposite, achieving efficient energy transfer and the best red afterglow performance.
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Qian Peng et al.
Summary: Through theoretical and quantum chemistry calculations, the mechanism of intermolecular electrostatic interaction-induced room-temperature phosphorescence (RTP) has been elucidated. This mechanism is believed to be essential for understanding persistent organic RTP induced by aggregation/crystal and has been successfully applied in explaining various experiments.
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Jing Tan et al.
Summary: The study achieved time-dependent phosphorescence colors in carbon dots, showing a change from orange to green phosphorescence and emitting red and green phosphorescence simultaneously under suitable light energy.
ADVANCED MATERIALS
(2021)
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Shi-Yu Song et al.
Summary: A large-scale synthesis method for phosphorescent carbon nanodots (CNDs) has been demonstrated via precursors' self-exothermic reaction at room temperature, showing comparable fluorescence and phosphorescence properties with other synthesis methods. The exotic atom doped sp(2) hybridized carbon core serves as an emissive center to facilitate the intersystem crossing, enabling tunable phosphorescence lifetimes from 193 ms to 1.13 s at different temperatures. This method opens up a new avenue for room temperature fabrication of phosphorescent CNDs.
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Xiaowei Yu et al.
Summary: Carbon dots were incorporated into Eu-substituted AlPO4-5 zeolite to create a composite with triple emissions for advanced luminescence anti-counterfeiting. The composite displays excellent resistance and stability, and only requires two common excitation lights to trigger the triple emissions.
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Materials Science, Multidisciplinary
Shuo Li et al.
Summary: The advancement in materials chemistry has significantly changed human lifestyle. Carbon dots, with their fascinating physicochemical properties, have been regarded as a groundbreaking carbon-based nanomaterial. However, the field of carbon dot-based materials chemistry remains incomplete due to their wide structural diversity, requiring further exploration. The review proposes novel viewpoints in this field and offers promising prospects for future developments.
Article
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Wenpeng Ye et al.
Summary: The study demonstrates a chemical strategy for achieving high-performance blue phosphorescence by confining isolated chromophores in ionic crystals, forming high-density ionic bonds between the cations of ionic crystals and the carboxylic acid groups of the chromophores to create a segregated molecular arrangement with negligible inter-chromophore interactions.
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