Synthesis of Au130(SR)50 and Au130−xAgx(SR)50 nanomolecules through core size conversion of larger metal clusters

文献情報

出版日 2014-04-15

DOI 10.1039/C3CP54343A

インパクトファクター 3.676

著者

Vijay Reddy Jupally, Amala Dass

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要旨

Gold nanomolecules with a precise number of metal atoms and thiolate ligands are being used for catalysis, biosensing, drug delivery and as alternative energy sources. Highly monodisperse products, with reproducible synthesis and complete characterization, are essential for these purposes. Post synthetic etching is used to synthesize highly stable gold nanomolecules. We report a synthetic protocol for the scalable synthesis of Au130(SR)50 for the first time, by etching of larger clusters via a core conversion process. Au130(SR)50 is not present in the crude product, but, is exclusively formed by etching larger clusters (>40 kDa). This is the first evidence that larger nanocluster cores convert to Au130(SR)50. The special stability of Au130(SR)50 is confirmed by the formation of Au130−x(metal)x(SR)50, where R = CH2CH2Ph, C6H13, C12H25 and metal = Ag, Pd. AuxAg130−x(SR)50 is isolated and characterized with two different Au : Ag precursor ratios. Upon alloying there is a change in the optical features of this 130-metal atom nanomolecule. To understand the process of etching and core conversion, a possible mechanism is being proposed. Highly stable nanomolecules like this can find potential applications in high temperature catalysis and sensing.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.