Published: Jan. 1, 2024
Language: Английский
Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(50)
Published: Aug. 17, 2023
Abstract Large‐scale production of full‐color carbon dots (CDs) at room temperature under atmospheric pressure will promote their industrial application. Herein, o‐phenylenediamine is used as a single‐precursor source and hydrogen peroxide an oxidant. Kilogram‐scale CDs are obtained by stirring these reactants in air for 30 min. After purification acid treatment, blue‐, green‐, red‐fluorescence with photoluminescence peaks 481, 539, 625 nm quantum yields 21.76%, 27.12%, 13.06%, respectively. Based on chemical structural characterizations, reasonable formation mechanism deduced, blue, green, red fluorescence arising from nuclei stacked conjugate planes containing fragments quinoxaline, 2,3‐diaminophenazine (2,3‐DAPN), protonated 2,3‐DAPN, High‐quality multi‐color white light‐emitting diodes successfully fabricated to demonstrate potential commercial applications display illumination.
Language: Английский
Citations
52
Nano Today, Journal Year: 2024, Volume and Issue: 55, P. 102200 - 102200
Published: Feb. 13, 2024
Language: Английский
Citations
52
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 13, 2024
The combination of advanced photoluminescence characteristics to photochromism is highly attractive in preparing high-performance multifunctional photo-responsive materials for optoelectronic applications. However, this rather challenging material design owing the limited mechanism understanding and construction principles. Here, an effective strategy integrate afterglow emission carbon dots (CDs) proposed through embedding naphthaleneimide (NI) structure CDs followed by polyvinylpyrrolidone (PVP) encapsulation. NI-structured CDs-PVP shows intrinsic situ formation NI-radical anions controllable multi-stimuli-responsive behaviors related oxygen-trigged triplet exciton quenching Förster resonance energy transfer (FRET) from pristine photoactivated radicals. Notably, a wide range appearance colors colorless brown, luminescence color transition blue yellow, much elongated lifetime up 253 ms are observed. With extraordinary stimuli-chromic stimuli-luminescent film dynamically responsive multiple external stimuli, reversible secure snapchat, data encryption/decryption synaptic imaging recognition realized. These findings demonstrate fundamental principle photochromic with afterglow, providing important understandings on synergic dynamic thereby expanding their applications information anti-counterfeiting artificial intelligence.
Language: Английский
Citations
14
ACS Sustainable Chemistry & Engineering, Journal Year: 2022, Volume and Issue: 11(1), P. 23 - 28
Published: Dec. 29, 2022
Multicolor solid-state fluorescent CDs were prepared by a one-step solvothermal method using citric acid as the carbon source and six alkyl amines carbonization solvents. We found that chain type of amine solvent significantly affects interaction between dots in solid state thus fluorescence wavelength quantum efficiency CDs.
Language: Английский
Citations
28
Chemistry - A European Journal, Journal Year: 2023, Volume and Issue: 29(65)
Published: Sept. 8, 2023
Carbon dots (CDs) smaller than 10 nm constitute a new type of fluorescent carbon-based nanomaterial. They have attracted much attention owing to their unique structures and excellent photoelectric properties. Primitive CDs usually comprise carbon oxygen are synthesized in one step from various natural products or synthetic organic compounds, via microwave hydrothermal methods. However, the uniformity surface functional groups often make lack diversity active sites required for specific applications. Therefore, functionalization by is powerful strategy improving photophysical photochemical This paper reviews modification strategies overcome these shortcomings. Functionalizing using covalent non-covalent can give them properties broaden applicability.
Language: Английский
Citations
16
Journal of Luminescence, Journal Year: 2023, Volume and Issue: 262, P. 119977 - 119977
Published: June 6, 2023
Language: Английский
Citations
15
Small, Journal Year: 2024, Volume and Issue: 20(25)
Published: Jan. 14, 2024
Abstract Smart luminescent materials that have the ability to reversibly adapt external environmental stimuli and possess a wide range of responses are continually emerging, which place higher demands on means regulation response sites. Here, europium ions (Eu 3+ )‐directed supramolecular metallogels constructed by orthogonal self‐assembly Eu based coordination interactions hydrogen bonding. A new organic ligand ( L ) is synthesized, consisting crown ethers two flexible amide bonds‐linked 1,10‐phenanthroline moieties coordinate with . Synergistic intermolecular bonding in ‐ enable self‐assemble into shape‐persistent 3D MeOH solution. The key success utilization ethers, playing dual roles acting both as building blocks build C 2 ‐symmetrical structure, ideal monomer for increasing energy transfer from ’s excited state, thus maintaining excellent luminescence metallogels. Interestingly, such assemblies show K + , pH, F − mechano‐induced reversible gel‐sol transitions tunable properties. Above findings useful studies molecular switches, dynamic assemblies, smart materials.
Language: Английский
Citations
6
Science China Materials, Journal Year: 2024, Volume and Issue: 67(8), P. 2590 - 2599
Published: June 19, 2024
Language: Английский
Citations
6
Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown
Published: July 2, 2024
Abstract Donor–acceptor (D–A) structure with charge transfer (CT) effect is widely utilized in the construction of organic luminescent materials. The adjustment their CT and related property usually relies on changes molecular different D or A moieties, which will lead to some uncertainties structure‐property relationship. With aim explore clear inherent mechanism for D–A molecule effect, it ideal that regulation intramolecular one same can be realized. Accordingly, three type phosphorescence luminogens are designed synthesized. Once being doped into polymer matrixes, disparate effects room temperature (RTP) properties achieved a single molecule. Subsequent experiments confirm distributions molecules locally excited (LE) state mainly responsible distinct RTP behaviors, exhibiting well‐clarified relationship luminogens. Furthermore, transition from LE even realized through chemical reaction, leading activated practical applications.
Language: Английский
Citations
6
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 27, 2024
Abstract The powerful capability of multi‐stimulus‐responsive fluorescent hydrogen‐bonded organic frameworks (HOFs) to respond external chemical or physical stimuli in various manners makes them appealing advanced information encryption. However, it is still a global challenge manipulate the fluorescence properties finely achieve dynamic time dimension. Here, feasible strategy shown control emission materials by introducing common SP photochromic compound (1′, 3′, 3′‐trimethyl‐6‐nitro‐spiro‐ [chromene‐2, 2′‐indoline]) into functionalized HOFs, properties. Two kinds HOFs are successfully synthesized modifying unbonded carboxylic group with Tb 3+ 5‐hexene‐1‐ol termed Tb‐HOFs and HOF‐olefin, respectively. Then, spiropyran loaded HOFs‐olefin can be well controlled changing lanthanide dopants light stimulation time. Relying on emission, multilevel encryption including anti‐counterfeiting ink, QR code, base time‐resolved storage has been demonstrated, security level greatly improved. This work opens an avenue for achieving technology, where “time factor” equivalent key, which introduces countless unpredictable possibilities imitation more challenging.
Language: Английский
Citations
6