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相关概念视频

Halogenation of Alkenes02:46

Halogenation of Alkenes

17.1K
Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
17.1K
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

3.5K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
3.5K

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Updated: May 2, 2026

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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用于光电子应用的溶液加工六甲 (IV), Cs2PdBr6

Nobuya Sakai1, Amir Abbas Haghighirad1, Marina R Filip2

  • 1Clarendon Laboratory, Department of Physics, University of Oxford , Parks Road, Oxford OX1 3PU, United Kingdom.

Journal of the American Chemical Society
|April 21, 2017
PubMed
概括

研究人员开发了一种新的无矿,Cs2PdBr6,为光电子设备提供稳定,防水的替代品. 这种有前途的材料具有出色的光发光和适合高级应用的带隙.

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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
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相关实验视频

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科学领域:

  • 材料科学
  • 固态物理
  • 太阳能发电

背景情况:

  • 合物矿具有很大的光电子和光伏潜力.
  • 由于的毒性,化学不稳定性和对水分的敏感性阻碍了商业化.

研究的目的:

  • 引入一种新的无矿相关化合物,Cs2PdBr6.
  • 评估其潜在应用的光电子特性和稳定性.

主要方法:

  • 处理Cs2PdBr6的溶液.
  • 光发光和光带间隙测量
  • 电子带结构和有效质量的密度函数理论 (DFT) 计算.

主要成果:

  • Cs2PdBr6可通过长寿命光发光和1.6 eV光带间隙进行溶液处理.
  • DFT计算揭示了具有特定电子和孔有效质量的分散电子带.
  • 这种化合物具有显著的耐水性,与以为基础的矿不同.

结论:

  • Cs2PdBr6是光电子应用的有希望的无替代品.
  • 它的耐水性表明长期稳定性得到了增强.
  • 该材料的特性使其适合在设备开发中进行进一步的研究.