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Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation02:47

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Introduction
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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Preparation and Use of Carbonyl-decorated Carbenes in the Activation of White Phosphorus
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Hydroxyl-Assisted Phosphorene Stabilization with Robust Device Performances.

Shancheng Yan1,2, Haizeng Song3, Liwen F Wan4

  • 1Department of Materials Science and Engineering , University of California , Berkeley , California 94720 , United States.

Nano Letters
|December 11, 2019
PubMed
Summary
This summary is machine-generated.

We developed an alkali-assisted method to stabilize phosphorene (few-layer black phosphorus), enabling its use in practical applications. This breakthrough enhances phosphorene

Keywords:
Phosphorenechemical stabilityelectrochemical water splittingliquid exfoliation

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrochemistry

Background:

  • Phosphorene, derived from black phosphorus, exhibits unique optoelectronic properties.
  • Instability of phosphorene in ambient conditions due to rapid degradation limits its applications.
  • Existing methods struggle to provide long-term stability for phosphorene.

Purpose of the Study:

  • To develop a novel stabilization process for high-quality phosphorene nanosheets.
  • To investigate the stability and electrical properties of alkali-treated phosphorene.
  • To evaluate the performance of stable phosphorene in electrochemical water splitting.

Main Methods:

  • An alkali-assisted treatment was employed to stabilize phosphorene.
  • Morphological and electrical characterizations were performed on treated phosphorene.
  • Light-assisted electrochemical water splitting experiments were conducted.

Main Results:

  • Alkali-treated phosphorene demonstrated stability for over 7 days in air.
  • Stable electrical properties of alkali-treated phosphorene devices were confirmed.
  • Superior performance in light-assisted electrochemical water splitting was achieved.

Conclusions:

  • Alkali treatment effectively stabilizes phosphorene through surface P-OH bond formation.
  • Stabilized phosphorene exhibits robust performance under ambient conditions.
  • This method enables the practical implementation of phosphorene-based devices.