0000000001310290
AUTHOR
Thomas W. Ni
Jahn–Teller effects in Au25(SR)18
The relationship between oxidation state, structure, and magnetism in many molecules is well described by first-order Jahn–Teller distortions. This relationship is not yet well defined for ligated nanoclusters and nanoparticles, especially the nano-technologically relevant gold-thiolate protected metal clusters. Here we interrogate the relationships between structure, magnetism, and oxidation state for the three stable oxidation states, −1, 0 and +1 of the thiolate protected nanocluster Au25(SR)18. We present the single crystal X-ray structures of the previously undetermined charge state Au25(SR)18+1, as well as a higher quality single crystal structure of the neutral compound Au25(SR)180. …
Structural and Theoretical Basis for Ligand Exchange on Thiolate Monolayer Protected Gold Nanoclusters
Ligand exchange reactions are widely used for imparting new functionality on or integrating nanoparticles into devices. Thiolate-for-thiolate ligand exchange in monolayer protected gold nanoclusters has been used for over a decade; however, a firm structural basis of this reaction has been lacking. Herein, we present the first single-crystal X-ray structure of a partially exchanged Au(102)(p-MBA)(40)(p-BBT)(4) (p-MBA = para-mercaptobenzoic acid, p-BBT = para-bromobenzene thiol) with p-BBT as the incoming ligand. The crystal structure shows that 2 of the 22 symmetry-unique p-MBA ligand sites are partially exchanged to p-BBT under the initial fast kinetics in a 5 min timescale exchange reacti…
Jahn–Teller effects in Au25(SR)18
The relationship between oxidation state, structure, and magnetism in many molecules is well described by first-order Jahn–Teller distortions. This relationship is not yet well defined for ligated nanoclusters and nanoparticles, especially the nano-technologically relevant gold-thiolate protected metal clusters. Here we interrogate the relationships between structure, magnetism, and oxidation state for the three stable oxidation states, 1, 0 and +1 of the thiolate protected nanocluster Au25(SR)18. We present the single crystal X-ray structures of the previously undetermined charge state Au25(SR)18+1, as well as a higher quality single crystal structure of the neutral compound Au25(SR)180 . …
CCDC 1055143: Experimental Crystal Structure Determination
Related Article: Marcus A. Tofanelli, Kirsi Salorinne, Thomas W. Ni, Sami Malola, Brian Newell, Billy Phillips, Hannu Häkkinen, Christopher J. Ackerson|2016|Chemical Science|7|1882|doi:10.1039/C5SC02134K
CCDC 1055144: Experimental Crystal Structure Determination
Related Article: Marcus A. Tofanelli, Kirsi Salorinne, Thomas W. Ni, Sami Malola, Brian Newell, Billy Phillips, Hannu Häkkinen, Christopher J. Ackerson|2016|Chemical Science|7|1882|doi:10.1039/C5SC02134K