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

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• 作者：Robin S. Tanke ; Susan M. Kauzlarich ; Timothy E. Patten ; Katherine A. Pettigrew ; Drew L. Murphy ; Mark E. Thompson ; and Howard W. H. Lee
• 刊名：Chemistry of Materials
• 出版年：2003
• 出版时间：April 22, 2003
• 年：2003
• 卷：15
• 期：8
• 页码：1682 - 1689
• 全文大小：285K
• 年卷期：v.15,no.8(April 22, 2003)
• ISSN：1520-5002

文摘

Germanium nanoclusters of average diameter 4 nm were prepared with covalently boundtermination groups. Chloride-terminated nanoclusters were reacted with a Grignard reagentto form acetal-containing surface-terminated nanoclusters. Treatment with acid yieldedhydroxyl-containing surface-terminated nanoclusters, and treatment with an acid bromideand base yielded an ester-containing surface-terminated nanocluster. Atom transfer radicalpolymerization (ATRP) was used to graft polymer chains from the surfaces of thenanoparticles to yield hybrid nanostructures. Changes of the termination group in thenanoclusters did not alter the photophysics of the original nanoclusters, a result that isconsistent with a stable nanocluster surface. The nanoclusters were characterized by HRTEM(high-resolution transmission electron microscopy), NMR, FTIR, UV-vis, and fluorescencespectroscopy.