Full-Color, Narrowband, and High-Efficiency Electroluminescence from Boron and Carbazole Embedded Polycyclic Heteroaromatics

Journal of the American Chemical Society, Год журнала: 2020, Номер 142(46), С. 19468 - 19472

Опубликована: Ноя. 5, 2020

Herein, we demonstrate that the strategic implementation of electron-accepting tricoordinate boron and electron-donating carbazole subunits into polycyclic aromatic hydrocarbons (PAHs) produces a family attractive full-color luminophores can emit narrowband efficient thermally activated delayed fluorescence (TADF). A versatile modular design for these boron- carbazole-embedded PAHs facilitate systematic modulation their photophysical optoelectronic properties. Organic light-emitting diodes utilize as TADF emitters electroluminescence from blue to red, achieving high maximum external quantum efficiencies 29.3%, 31.8%, 22.0% blue, green, respectively.

Язык: Английский

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2D graphdiyne: an emerging carbon material

Chemical Society Reviews, Год журнала: 2022, Номер 51(7), С. 2681 - 2709

Опубликована: Янв. 1, 2022

This review highlights the fundamental and applied research on graphdiyne in various fields, along with challenges future opportunities.

Язык: Английский

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Advances in carbon dots: from the perspective of traditional quantum dots

Materials Chemistry Frontiers, Год журнала: 2020, Номер 4(6), С. 1586 - 1613

Опубликована: Янв. 1, 2020

A brief review of CDots from the perspective traditional QDs clarifies basic concepts, unique characteristics and challenges.

Язык: Английский

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Nanoarchitectonics: what's coming next after nanotechnology?

Nanoscale Horizons, Год журнала: 2021, Номер 6(5), С. 364 - 378

Опубликована: Янв. 1, 2021

The nanoarchitectonics concept has the ability to bridge nanoscale science and visual size materials. final goal of approaches is creation living-creature-like functional material systems from simple objects.

Язык: Английский

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Nanographenes and Graphene Nanoribbons as Multitalents of Present and Future Materials Science

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(26), С. 11499 - 11524

Опубликована: Июнь 7, 2022

As cut-outs from a graphene sheet, nanographenes (NGs) and nanoribbons (GNRs) are ideal cases with which to connect the world of molecules that bulk carbon materials. While various top-down approaches have been developed produce such nanostructures in high yields, present perspective, precision structural control is emphasized for length, width, edge structures NGs GNRs achieved by modern solution on-surface syntheses. Their possibilities further extended "flatland" three-dimensional world, where chirality handedness jewels crown. In addition properties exhibited at molecular level, self-assembly thin-film cannot be neglected, emphasizes importance processing techniques. With rich toolkit chemistry hand, can endowed versatile functions ranging stimulated emission spintronics bioimaging energy storage, thus demonstrating their multitalents future materials science.

Язык: Английский

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Two-Dimensional Carbon Graphdiyne: Advances in Fundamental and Application Research

ACS Nano, Год журнала: 2023, Номер 17(15), С. 14309 - 14346

Опубликована: Июль 20, 2023

Graphdiyne (GDY), a rising star of carbon allotropes, features two-dimensional all-carbon network with the cohybridization sp and sp2 atoms represents trend research direction in development materials. The sp/sp2-hybridized structure GDY endows it numerous advantages advancements controlled growth, assembly, performance tuning, many studies have shown that has been key material for innovation fields catalysis, energy, photoelectric conversion, mode conversion transformation electronic devices, detectors, life sciences, etc. In past ten years, fundamental scientific issues related to understood, showing differences from traditional materials chemical physical properties mechanisms, attracting extensive attention scientists. gradually developed into one frontiers chemistry science, entered rapid period, producing large numbers applied achievements For exploration frontier concepts phenomena science research, there is great potential promote progress intelligent information, optoelectronics, sciences. this review, self-assembly method, aggregation structure, modification, doping are shown, theoretical calculation simulation also fully introduced. particular, applications its formed aggregates energy storage, photoelectronic, biomedicine, environmental separation

Язык: Английский

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Small Size, Big Impact: Recent Progress in Bottom‐Up Synthesized Nanographenes for Optoelectronic and Energy Applications

Advanced Science, Год журнала: 2022, Номер 9(19)

Опубликована: Фев. 26, 2022

Bottom-up synthesized graphene nanostructures, including 0D quantum dots and 1D nanoribbons, have recently emerged as promising candidates for efficient, green optoelectronic, energy storage applications. The versatility in their molecular structures offers a large novel library of nanographenes with excellent adjustable optical, electronic, catalytic properties. In this minireview, recent progress on the fundamental understanding properties different state-of-the-art applications optoelectronics are summarized. pristine nanographenes, high emissivity intriguing blinking effect dots, superior charge transport edge-specific electrochemistry various highlighted. Furthermore, it is shown that emerging nanographene-2D material-based van der Waals heterostructures provide an exciting opportunity efficient tunable characteristics. Finally, challenges opportunities field highlighted by offering guidelines future combined efforts synthesis, assembly, spectroscopic, electrical studies well (nano)fabrication to boost toward advanced device

Язык: Английский

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Aggregation caused quenching to aggregation induced emission transformation: a precise tuning based on BN-doped polycyclic aromatic hydrocarbons toward subcellular organelle specific imaging

Chemical Science, Год журнала: 2022, Номер 13(11), С. 3129 - 3139

Опубликована: Янв. 1, 2022

Polycyclic aromatic hydrocarbons (PAHs) with boron-nitrogen (BN) moieties have attracted tremendous interest due to their intriguing electronic and optoelectronic properties. However, most of the BN-fused π-systems reported date are difficult modify exhibit traditional aggregation-caused quenching (ACQ) characteristics. This phenomenon greatly limits scope application. Thus, continuing efforts seek novel, structurally distinct functionally diverse structures highly desirable. Herein, we proposed a one-stone-two-birds strategy including simultaneous exploration reactivity tuning optical properties for BN-containing π-skeletons through flexible regioselective functionalization engineering. In this way, three novel functionalized BN luminogens (DPA-BN-BFT, MeO-DPA-BN-BFT DMA-DPA-BN-BFT) similar were obtained. Intriguingly, DPA-BN-BFT, DMA-DPA-BN-BFT completely different emission behaviors. Fluorogens DPA-BN-BFT typical ACQ effect; in sharp contrast, possesses prominent aggregation induced (AIE) effect. To best our knowledge, is first report integrate AIE into one backbone subtle modified structures. Comprehensive analysis crystal structure theoretical calculations reveal that relatively large twisting angles, multiple intermolecular interactions tight packing modes endow strong behavior. More importantly, cell imaging demonstrated luminescent materials can selectively sensitively detect lipid droplets (LDs) living MCF-7 cells. Overall, work provides new viewpoint rational design synthesis advanced BN-polycyclic aromatics features triggers discovery functions azaborine chemistry.

Язык: Английский

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Aza-Triangulene: On-Surface Synthesis and Electronic and Magnetic Properties

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(10), С. 4522 - 4529

Опубликована: Март 7, 2022

Nitrogen heteroatom doping into a triangulene molecule allows tuning its magnetic state. However, the synthesis of nitrogen-doped (aza-triangulene) has been challenging. Herein, we report successful aza-triangulene on Au(111) and Ag(111) surfaces, along with their characterizations by scanning tunneling microscopy spectroscopy in combination density functional theory (DFT) calculations. Aza-triangulenes were obtained reducing ketone-substituted precursors. Exposure to atomic hydrogen followed thermal annealing and, when necessary, manipulations probe afforded target product. We demonstrate that Au(111), donates an electron substrate exhibits open-shell triplet ground This is derived from different Kondo resonances final product series intermediates Au(111). Experimentally mapped molecular orbitals match DFT-calculated counterparts for positively charged aza-triangulene. In contrast, receives extra displays closed-shell character. Our study reveals electronic properties metal surfaces offers approach fabrication new hydrocarbon structures, including reactive molecules.

Язык: Английский

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The Rise of 1,4‐BN‐Heteroarenes: Synthesis, Properties, and Applications

Advanced Science, Год журнала: 2022, Номер 9(19)

Опубликована: Апрель 14, 2022

BN-heteroarenes, which employ both boron and nitrogen in aromatic hydrocarbons, have gained great attention the fields of organic chemistry materials science. Nevertheless, extensive studies on BN-heteroarenes are largely limited to 1,2-azaborine-based compounds with B-N covalent bonds, whereas 1,3- 1,4-BN-heteroarenes relatively rare due their greater challenge synthesis. Recently, significant progresses been achieved synthesis applications featuring 1,4-azaborines, especially driven by potential as multiresonant thermally activated delayed fluorescence (MR-TADF) materials. Therefore, it is timely review these advances from perspective. This summarizes synthetic methods recent achievements 1,4-azaborine-based discusses unique properties this emerging class materials, highlighting value beyond MR-TADF It hoped that would stimulate conversation cooperation between chemists who interested azaborine scientists working optoelectronics, metal catalysis, carbon-based nanoscience etc.

Язык: Английский

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