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相关概念视频

Benzene to Phenol via Cumene: Hock Process01:27

Benzene to Phenol via Cumene: Hock Process

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The synthesis of phenol from benzene via cumene and cumene hydroperoxide is called the Hock process. First, a Friedel–Crafts alkylation reaction of benzene with propene gives cumene. Then cumene forms cumene hydroperoxide via a radical chain reaction. In the chain initiation step, the benzylic hydrogen is abstracted to give a benzylic radical. In the chain propagation step, the benzylic radical reacts with an oxygen diradical to form a cumene hydroperoxide radical. The cumene...
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Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
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Simple aryl halides do not react with nucleophiles under normal conditions. However, the reaction can proceed under drastic conditions involving high temperatures and high pressure to give the substituted products. For example, chlorobenzene is converted to phenol using aqueous sodium hydroxide at 350 °C under high pressure by the Dow process. The reaction follows an elimination-addition mechanism involving a benzyne intermediate. Here, the chloride ion is...
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玻罗芬 通过 间隔 剥落 剥落

Zhixuan Li1, Gaurav Pandey2, Arkamita Bandyopadhyay3

  • 1Global Innovative Centre for Advanced Nanomaterials, School of Engineering, College of Engineering, Science and Environment, The University of Newcastle, Callaghan, NSW, 2308, Australia.

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概括

研究人员开发了一种可扩展的,单步合成的烯,烯是一种具有出色电子和热性能的材料. 这一突破使灵活的电子产品和能量收集设备的应用更广泛.

关键词:
玻罗芬烯是一种基.脱皮 剥落 剥落 剥落它们是间歇性干扰.一个纳米发电机.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术
  • 凝聚物质物理学 凝聚物质物理学

背景情况:

  • 烯是一种二维材料,具有卓越的电子,热和机械性能.
  • 目前烯的合成方法复杂,昂贵,难以扩展.
  • 玻罗的独特特性使得它成为储能,催化和电子领域的有前途的产品.

研究的目的:

  • 开发一种可扩展的,单阶段的烯合成方法.
  • 描述合成的烯的结构,化学和电子特性.
  • 为了证明玻罗芬在能源采集设备中的性能.

主要方法:

  • 在二甲基形式胺 (DMF) 中使用性金属化物 (LiF,KF) 进行间接脱皮.
  • 超声波辅助的剥皮过程.
  • 使用原子力显微镜 (AFM),传输电子显微镜 (TEM),拉曼光谱和X射线光电子光谱 (XPS) 的表征.
  • 分子动力学 (MD) 模拟以了解剥皮机制.
  • 烯集成压电/三电纳米发电机 (PENG/TENG) 的制造和测试.

主要成果:

  • 成功合成了几层波罗芬薄膜 (200nm到2μm).
  • 鉴定证实了高纯度和金属性质的β12和χ3相的存在.
  • MD模拟显示,减少了层间合,促进了脱皮.
  • 烯基纳米复合材料在纳米发电机中显示出增强的灵敏度,达到~118V.

结论:

  • 已经建立了一种新的,可扩展的,单步合成方法,用于烯.
  • 合成的烯具有用于先进应用的理想性质.
  • 这种方法克服了以前的可扩展性限制,为在灵活的电子产品和能源采集中广泛使用烯铺平了道路.