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Updated: Jun 27, 2025

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
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電子を取り除く窒素原子をポリサイクル芳香炭化水素光エミターにドーピングすることによってもたらされる窒素効果

Yimin Wu1, Xiaoyu Liu1, Junjie Liu1

  • 1Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, People's Republic of China.

Journal of the American Chemical Society
|May 7, 2024
PubMed
まとめ

ポリサイクル芳香炭化水素 (PAH) に窒素をドーピングすることによって"窒素効果"を導入することで,有機発光ダイオード (OLED) の光材料の効率を高める. この革新は青いOLEDの性能と 外部量子効率を大幅に向上させます

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Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
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In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as...
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All meta-directing substituents are deactivating groups. These substituents withdraw electrons from the aromatic ring, making the ring less reactive toward electrophilic substitution. For example, the nitration of nitrobenzene is 100,000 times slower than that of benzene because of the deactivating effect of the nitro group. The first step in an electrophilic aromatic substitution is the addition of an electrophile to form a resonance-stabilized carbocation. The energy diagrams for...
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