Abstract
During our effort to synthesize the tetrahedral Au20 cluster, we found a facile synthetic route to prepare monodisperse suspensions of ultrasmall Au clusters AuN (N < 12) using diphosphine ligands. in our monophasic and single-pot synthesis, an Au precursor ClAu(I)PPh3 (Ph = phenyl) and a bidentate phosphine ligand P(Ph)2(CH 2) M (Ph)2 are dissolved in an organic solvent. Au(I) is reduced slowly by a borane-tert-butylamine complex to form Au clusters coordinated by the diphosphine ligand. the Au clusters are characterized by both high-resolution mass spectrometry and UV-vis absorption spectroscopy. We found that the mean cluster size obtained depends on the chain length M of the ligand. in particular, a single monodispersed Au11 cluster is obtained with the P(Ph)2(CH2)3P(Ph)2 ligand, whereas P(Ph)2(CH2) MP (Ph)2 ligands with M = 5 and 6 yield Au10 and Au8 clusters. the simplicity of our synthetic method makes it suitable for large-scale production of nearly monodisperse ultrasmall Au clusters. It is suggested that diphosphines provide a set of flexible ligands to allow size-controlled synthesis of Au nanoparticles. © 2006 American Chemical Society.
Recommended Citation
M. F. Bertino et al., "Facile Syntheses of Monodisperse Ultrasmall Au Clusters," Journal of Physical Chemistry B, vol. 110, no. 43, pp. 21416 - 21418, American Chemical Society, Nov 2006.
The definitive version is available at https://doi.org/10.1021/jp065227g
Department(s)
Physics
International Standard Serial Number (ISSN)
1520-6106
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Chemical Society, All rights reserved.
Publication Date
02 Nov 2006
