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Related Concept Videos

Preparation and Reactions of Thiols02:33

Preparation and Reactions of Thiols

Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.

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Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions
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The complex thiol-palladium interface: a theoretical and experimental study.

Pilar Carro1, Gastón Corthey, Aldo A Rubert

  • 1Departamento de Química Física, Universidad de La Laguna, Tenerife, Spain. pcarro@ull.es

Langmuir : the ACS Journal of Surfaces and Colloids
|August 24, 2010
PubMed
Summary
This summary is machine-generated.

This study reveals how thiol and sulfide structures form on palladium surfaces. Increasing thiol chemical potential drives the formation of ordered sulfur lattices and complex adlayers, impacting palladium surface reconstruction.

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Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
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Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
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Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles

Published on: June 25, 2018

Area of Science:

  • Surface Science
  • Materials Chemistry
  • Catalysis

Background:

  • Palladium surfaces are crucial in catalysis.
  • Understanding adsorbate structures is key to optimizing catalytic processes.
  • Thiol and sulfide species significantly influence metal surface behavior.

Purpose of the Study:

  • To theoretically investigate surface structures and thermodynamic stability of thiol and sulfide species on palladium.
  • To correlate surface structure evolution with the chemical potential of thiol species.
  • To elucidate the role of palladium's catalytic properties in surface ordering.

Main Methods:

  • Theoretical modeling of surface structures.
  • Thermodynamic stability analysis.
  • Comparison with experimental X-ray photoelectron spectroscopy (XPS) data.

Main Results:

  • A (√3 × √3)R30° sulfur lattice forms on palladium with increasing thiol chemical potential.
  • Denser (√7 × √7)R19.1° sulfur lattices and complex sulfur-thiol adlayers emerge at higher thiol concentrations.
  • Significant Pd(111) surface reconstruction accompanies the phase transition to the sulfur-thiol adlayer.

Conclusions:

  • The chemical potential of thiols dictates the formation and ordering of sulfur and thiol adlayers on palladium.
  • Surface structure transitions are linked to palladium's catalytic properties.
  • Theoretical findings align with experimental observations from XPS studies.