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Multimetallic arrays: Symmetrical bi-, tri- and tetrametallic complexes based on the group 10 metals and the functionalisation of gold nanoparticles with nickel-phosphine surface units

Knight, ER; Leung, NH; Lin, YH; Cowley, AR; Watkin, DJ; Thompson, AL; ... Wilton-Ely, JDET; + view all (2009) Multimetallic arrays: Symmetrical bi-, tri- and tetrametallic complexes based on the group 10 metals and the functionalisation of gold nanoparticles with nickel-phosphine surface units. DALTON T (19) 3688 - 3697. 10.1039/b821947h.

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Abstract

Homobimetallic complexes of nickel, palladium and platinum, [(L2M)(2)(S2CNC4H8NCS2)](2+), are formed on reaction of the piperazine bis(dithiocarbamate) linker, KS2CNC4H8NCS2K, with [MCl2L2] (M = Ni, L-2 = dppe, dppf; M = Pd, L-2 = dppf; M = Pt, L = PEt3, PMePh2, PPh3, L-2 = dppf). [{Pd(C,N-C6H4CH2NMe2)}(2)(S2CNC4H8NCS2)] can be obtained in the same way. On reaction of [MCl2L2] (M = Pd, Pt) with the zwitterion S2CNC4H8NH2, a symmetrisation process occurs to yield a mixture of the complexes [M(S2CNC4H8NH2)L-2](2+) and [(L2M)(2)(S2CNC4H8NCS2)](2+). However, the monometallic complexes [L2Ni(S2CNC4H8NH2)](2+) (L-2 = dppe, dppf) and [(L2Ni)(2)( S2CNC4H8NCS2)](2+) can be prepared without ready symmetrisation. Starting from the previously reported [(dppm)Ru(S2CNC4H8NH2)](2+), the heterotrimetallic products [(dppm) Ru(S2CNC4H8NCS2)M(dppf)](2+) (M = Pd, Pt) can be prepared without symmetrisation occurring. The crystal structures of five complexes are reported. The metalla-dithiocarbamate complexes [L2Ni(S2CNC4H8NCS2)] (L-2 = dppe, dppf) were used to functionalise the surface of gold nanoparticles by the displacement of a citrate shell to yield NiAu and FeNiAu materials.

Type:Article
Title:Multimetallic arrays: Symmetrical bi-, tri- and tetrametallic complexes based on the group 10 metals and the functionalisation of gold nanoparticles with nickel-phosphine surface units
DOI:10.1039/b821947h
Keywords:DITHIOCARBAMATE COMPLEXES, COORDINATION CHEMISTRY, SUBSTITUTION REACTIONS, MOLECULAR-STRUCTURE, COLLOID MONOLAYERS, LIGANDS, MACROCYCLES, COBALT(III), ASSEMBLIES, BEHAVIOR
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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