1165801-05-7Relevant articles and documents
Multimetallic arrays: Bi-, Tri-, Tetra-, and hexametallic complexes based on Gold(l) and Gold(lll) and the surface functionalization of Gold nanoparticles with transition metals
Knight, Edward R.,Leung, Nina H.,Thompson, Amber L.,Hogarth,Wilton-Ely, James D. E. T.
, p. 3866 - 3874 (2009/08/14)
Reaction of [AuCI(PPh3)] with the zwtteron S 2CNC4H8NH2 yields [(Ph 3P)Au(S2CNC4H8NH2)] BF4. Treatment of this species with NEt3 and CS 2 followed by [AuCI(PPh3)] leads to [{(Ph 3P)Au}2(S2CNC4H8NCS 2)], which can also be obtained directly from [AuCI(PPh3)] and KS2CNC4H8NCS2K. A heterobmetallic variant, [(dppm)2Ru(S2CNC 4H8- NCS2)Au(PPh3)]+, can be prepared by the sequential reaction of [(dppm)2Ru(S 2CNC4H8NH2)]2+ with NEt3 and CS2followed by [AuCI(PPh3)]. Reaction of the same ruthenium precursor with [(dppm)(AuCI)2] under similar conditions yields the trimetallic complex [(dppm)2Ru(S 2CNC4H8NCS2)Au2(dppm)] 2+. Attempts to prepare the compound [(dppm)Au2(S 2CNC4H8NH2)]2+ from [(dppm)(AuCI)2] led to isolation of the known complex [{(dppm)- Au2}2(S2CNC4H8NCS 2)]2+ via a symmetrization pathway. [{(dppf)Au 2}2(S2CNC4H8NCS 2)]2+ was successfully prepared from [(dppf)(AuCI) 2] and crystallographically characterized. In addition, a gold(lll) trimetallic compound, [{(dppm)2Ru(S2CNC4H 8NCS2)}2Au]3+, and a tetrametallic gold(l) species, [{(dppm)2Ru(S2CNC4H 8NCS2)Au}2]2+, were also synthesized. This methodology was further exploited to attach the zwitterionic (dppm)2Ru(S2CNC4H8NCS2) unit to the surface of gold nanoparticles, which were generated in situ and found to be 3.4 (±0.3) and 14.4 (±2.5) nm in diameter depending on the method employed. Nanoparticles with a mixed surface topography were also explored.
