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Alkenes via Reductive Coupling of Aldehydes or Ketones: McMurry Reaction01:22

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The radical dimerization of ketones or aldehydes gives vicinal diols through a pinacol coupling reaction. However, the behavior of titanium metals used for the reaction as a source of electrons is unusual. When the reaction is carried out in the presence of titanium, diols can be isolated at low temperatures. Else titanium further reacts with diols, forming alkenes through the McMurry reaction.

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Chemically Tunable Ti3C2T MXene Surfaces.

Kevinilo P Marquez1,2, Mia Angela Judicpa1,3, Roy Alvin J Malenab1

  • 1Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia.

ACS Applied Materials & Interfaces
|March 3, 2025
PubMed
Summary
This summary is machine-generated.

Surface modification of Ti3C2Tx MXene with acids and bases creates oxygen-rich surfaces for reversible proton exchange. This tuning controls MXene dispersibility and ion kinetics, enabling versatile solution-based applications.

Keywords:
MXenedispersionssolvent exchangesurface modificationsurface termination

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • MXene (titanium carbide) surface modification is crucial for controlling material properties.
  • Understanding MXene interactions in diverse chemical environments is essential for advanced applications.

Purpose of the Study:

  • To investigate the effects of dilute acid and base treatments on Ti3C2Tx MXene surfaces.
  • To explore the resulting changes in surface chemistry, dispersibility, and ion kinetics.
  • To establish a versatile method for MXene surface functionalization.

Main Methods:

  • Treatment of Ti3C2Tx MXene with dilute acids and bases.
  • Characterization of surface chemistry, focusing on oxygen species.
  • Evaluation of MXene dispersibility in various organic solvents.
  • Analysis of ion kinetics in protonated and deprotonated states.

Main Results:

  • Acid/base treatments yield MXene surfaces enriched with oxygen species capable of reversible proton exchange.
  • MXene dispersibility in organic solvents can be toggled between states ('on'/'off') via successive treatments.
  • Protonated MXenes show reduced ion kinetics due to surface passivation.
  • Deprotonated MXenes exhibit enhanced ion kinetics.

Conclusions:

  • Solution-based acid/base treatments offer a versatile strategy for modifying MXene surfaces.
  • This approach allows tunable control over MXene dispersibility and ion transport properties.
  • The findings pave the way for broader applications of MXenes, independent of specific precursors or synthesis methods.