On the size evolution of gold-monolayer-protected clusters by ligand place-exchange reactions : the effect of headgroup-gold interactions
To functionalize Au MPCs (monolayer-protected gold clusters), ligand place-exchange reactions provide a convenient route in which the initial capping ligands are displaced by mixing the MPCs with an excess amount of incoming ones. However, literature reports show that the diameters of the modified p...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1992. - 26(2010), 9 vom: 04. Mai, Seite 6149-53 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2010
|
| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Ligands Nitriles Octanes Solvents Gold 7440-57-5 |
| Zusammenfassung: | To functionalize Au MPCs (monolayer-protected gold clusters), ligand place-exchange reactions provide a convenient route in which the initial capping ligands are displaced by mixing the MPCs with an excess amount of incoming ones. However, literature reports show that the diameters of the modified products do not always stay unchanged. Because of the diversity of experimental conditions carried out in the documented studies, there is still a lack of comprehensive understanding concerning the size evolution. Herein, carefully controlled and examined parameters include the initial size of MPCs [Au(101)(PPh(3))(21)Cl(5)], the reaction time, the concentration of incoming ligands, a homologous series of incoming ligands, and the anchoring headgroups. The results show that the final particle size is determined by the strength of headgroup-gold adsorption which is correlated with the curvature of the final product in a thermodynamic model derived from Gibbs-Thomson equation |
|---|---|
| Beschreibung: | Date Completed 02.08.2010 Date Revised 27.04.2010 published: Print Citation Status MEDLINE |
| ISSN: | 1520-5827 |
| DOI: | 10.1021/la100810z |