Fairbanks, M.C. and Benfield, R.E. and Newport, R.J. and Schmid, G. (1990) An EXAFS Study Of The Cluster Molecule Au55(PPh3)12Cl6. Solid State Communications, 73 (6). pp. 431-436. ISSN 0038-1098. (Full text available)
Gold L3 edge EXAFS has been used to study the coordination environment of gold atoms in the cluster molecule Au55(PPh3)12Cl6. The mean coordination of 7 by other gold atoms is consistent with a 3-shell cuboctahedral structure for the Au55 cluster. The first direct measurement of the Au-Au distance in this cluster shows that the spacing is significantly shorter than that in bulk metallic gold and is consistent with calorimetric work which has shown the Au-Au interactions are stronger in the cluster than in bulk gold. There is no evidence to suggest a significant spread of Au-Au distances in Au55(PPh3)12Cl6, in contrast to lower-nuclearity gold cluster molecules which have peripheral Au-Au distances typically 0.2Å longer than those to interstitial gold atoms.
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group|
|Depositing User:||J.M. Smith|
|Date Deposited:||09 Apr 1914 14:49|
|Last Modified:||19 Jun 2012 08:27|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/15897 (The current URI for this page, for reference purposes)|