酸:一个有前途的储材料.
Thomas Hügle1, Moritz F Kühnel, Dieter Lentz
1Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstrasse 34-36, 14195 Berlin, Germany.
研究人员增强了酸和酸.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 酸是储存的有希望的材料.
- 提高其释放动力学和容量对于实际应用至关重要.
研究的目的:
- 为了增强酸的储能力.
- 为了研究化添加对释放的作用.
主要方法:
- 将等等量化添加到酸.
- 使用重量百分比H的含量分析.
- 研究在不同温度下释放的行为.
主要成果:
- 混合物实现了14.8重量%H的储存容量.
- 观察到出色的释放率.
- 最佳的释放发生在100-150摄氏度之间.
结论:
- 同等量添加化显著改善了酸的储能性能.
- 改性材料在适度温度下提供高效的释放,适合实际应用.
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相关概念视频
Hydroboration-Oxidation of Alkenes
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One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
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Regioselectivity and Stereochemistry of Hydroboration
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn stereochemistry.
