Synthesis of Germanium Nanoclusters with Irreversibly Attached Functional Groups:  Acetals, Alcohols, Esters, and Polymers

Germanium nanoclusters of average diameter 4 nm were prepared with covalently bound termination groups. Chloride-terminated nanoclusters were reacted with a Grignard reagent to form acetal-containing surface-terminated nanoclusters. Treatment with acid yielded hydroxyl-containing surface-terminated...

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Bibliographic Details
Published in:Chemistry of materials 2003-04, Vol.15 (8), p.1682-1689
Main Authors: Tanke, Robin S, Kauzlarich, Susan M, Patten, Timothy E, Pettigrew, Katherine A, Murphy, Drew L, Thompson, Mark E, Lee, Howard W. H
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Nanoscale materials and structures: fabrication and characterization
Organic polymers
Physicochemistry of polymers
Physics
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:Germanium nanoclusters of average diameter 4 nm were prepared with covalently bound termination groups. Chloride-terminated nanoclusters were reacted with a Grignard reagent to form acetal-containing surface-terminated nanoclusters. Treatment with acid yielded hydroxyl-containing surface-terminated nanoclusters, and treatment with an acid bromide and base yielded an ester-containing surface-terminated nanocluster. Atom transfer radical polymerization (ATRP) was used to graft polymer chains from the surfaces of the nanoparticles to yield hybrid nanostructures. Changes of the termination group in the nanoclusters did not alter the photophysics of the original nanoclusters, a result that is consistent with a stable nanocluster surface. The nanoclusters were characterized by HRTEM (high-resolution transmission electron microscopy), NMR, FTIR, UV−vis, and fluorescence spectroscopy.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm021778h