Nishigaki, J.;Tsunoyama, R.; Tsunoyama, H.; Ichikuni, N.; Yamazoe, S.; Negishi, Y.; Ito, M,; Matsuo, T.; Tamao,K.; Tsukuda, T, J. Am. Chem. Soc., 2012, ASAP
A gold cluster, Au41(S-Eind)12, was synthe- sized by ligating the bulky arenethiol 1,1,3,3,5,5,7,7- octaethyl-s-hydrindacene-4-thiol (Eind-SH) to preformed Au clusters. Extended X-ray absorption fine structure, X- ray photoelectron spectroscopy, and the fragmentation pattern in the mass spectrometry analysis indicated that formation of gold−thiolate oligomers at the interface was suppressed, in sharp contrast to conventional thiolate- protected Au clusters.
Prof. Tsukuda from The University of Tokyo has been reported the formation of a new binding motif of the bulky Eind thiolate on a Au41 cluster. They obtained size-selected gold clusters protected by the bulky Eind-thiolate ligand having the formula Au41(S-Eind)12. Eind was developed by Prof. Kohei Tamao who is well-known as the nickel-catalyazed cross coupling reaction.