| Part 1. Electrochemical reduction of an acetonitrile/toluene (1/4 v/v) solution of C60 and cis -Pt(py)2Cl2 or [PtCl2(C2H 4)]2 in the presence of a supporting electrolyte (0.10 M tetra(n-butyl)ammonium perchlorate) has led to the formation of redox active C60/Pt films. The formation of the film is dependent on the platinum precursor and the potential range utilized during film growth. C60Pt1 that is prepared by a chemical method is also redox active, suggesting that …PtC60(PtC60) nPtC60… units are present in both C60Pt 1 and C60/Pt film, a conclusion supported by the XPS and IR spectroscopic results. Electrochemical reduction of a solution of C 70 and cis-Pt(py)2Cl2 or [PtCl 2(C2H4)]2 also leads to the formation of a redox active film.; Interestingly, electrochemically deposited C60/M films (M = Pt, Ir) serve as precursors to the development of novel fullerenes containing metals as part of the fullerene network. Laser ablation of these films results in the formation of metal substituted fullerenes, i.e. C58M, C 59M (M = Pt, Ir), C56Pt2, and C57Pt 2, in the gas phase. Further, the reactivity of these substituted fullerenes has been studied. All Ir-substituted fullerenes react with butene, but only certain Pt-substituted fullerenes react. These results suggest that the reactivity depends on the chemical nature of coordinated metals (Pt, Ir).; Part 2. X-ray crystallographic studies of 2-pyridylgold(I) trimer revealed two independent triangular species in the asymmetric unit. One is formed by a polymeric chain, and the other is formed by an isolated dimer. This gold trimer complex luminesces green-yellow under an UV lamp, and has been characterized by electronic and luminescence spectroscopy. Additionally, the partial decomposition of 2-pyridylgold(I) trimer deposits metallic gold on certain faces of the crystal, which results in an hourglass pattern. The crystals are known to be somewhat sensitive to light, but light does not produce this interesting pattern by itself. Other factors, which cause the hourglass feature, have been investigated. |
