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Colloidal precipitates01:09

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The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
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Dual Cluster-Surface Click Chemistries on Silver Nanoclusters.

Carolina Vega Verduga1, Jack E Bowman1, Jeffrey D Henderson2

  • 1Department of Chemistry Western University London Canada.

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|April 29, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed new azide-functionalized silver nanoclusters (Ag20 NCs) for versatile applications. They demonstrated a novel dual-surface click chemistry strategy to introduce multiple functionalities onto nanoclusters (NCs) efficiently.

Keywords:
Staudinger–Bertozzi ligationazideclick chemistrycluster surfacenanoclusterssilver

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Area of Science:

  • Nanomaterials Science
  • Organic Chemistry
  • Surface Chemistry

Background:

  • Nanoclusters (NCs) possess unique properties for biosensing, catalysis, and emissive applications.
  • Tailoring NC ligands is crucial for specific applications, achievable via direct synthesis or post-synthetic modification.
  • Cluster surface (CS) click chemistry offers a route to diverse NC libraries without altering the core structure, though examples are limited.

Purpose of the Study:

  • To synthesize and characterize novel azide-functionalized silver nanoclusters (Ag20 NCs).
  • To demonstrate the reactivity of these NCs using cluster-surface Staudinger-Bertozzi ligation (CS-SBL).
  • To showcase a dual-surface double-click strategy for introducing multiple functionalities onto NCs.

Main Methods:

  • Synthesis of two new azide-functionalized Ag20 NCs with a carbonate template.
  • Characterization of the synthesized NCs.
  • Demonstration of CS-SBL reactivity.
  • Implementation of a dual-surface double-click strategy involving CS-SBL and strain-promoted azide-alkyne cycloadditions.

Main Results:

  • Successful synthesis and characterization of novel azide-functionalized Ag20 NCs.
  • Demonstrated reactivity of the NCs via CS-SBL.
  • Showcased a dual-surface double-click strategy to introduce multiple functionalities under kinetic control.
  • Established a promising method for creating functionalized NC libraries.

Conclusions:

  • The study presents new azide-functionalized Ag20 NCs and their utility in click chemistry.
  • A dual-surface double-click strategy offers a versatile approach for NC functionalization.
  • This method enables the kinetic control introduction of multiple complementary functionalities onto nanoclusters.