Synthesis and Photophysical Study of Heterobinuclear Cyclometalated Pt-Au Complexes

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Talebi Mojarad, Tahereh | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46097 (03)
University: Sharif University of Technology
Department: Chemistry
Advisor(s): Jamali, Sirous
Abstract:
The cyclometalated heterobinuclear platinum-gold complexes [PtMe(bhq)(dppy)AuCl], 2, and [PtMe(bhq)(dppy)Au(NHC1)] PF6, 3, in which bhq= benzo{h}quinoline, dppy = 2-diphenylphosphinopyridine and NHC1 = 1,3-dimethylimidazol-2-ylidine have been prepared by reaction of the cyclometalated platinum complex [PtMe(bhq)(dppy)], 1, with 1 equivalent of AuCl(SMe2) or 1 equivalent of [Au(NHC1)]+ (prepared from ClAu(NHC1) and AgPF6), respectively. Complexes 2 and 3 were fully characterized using multinuclear NMR spectroscopy (1H, 31P). However complex 2was further characterized by x-ray crystallography, crystallization of complex 3 leads to form anew dimer complex 4,[Pt2(bhq)2(-dppy)2]2(PF6)2. The NMR and crystallography data show swapping of dppy ligand in the solution and in the solid state in which the P of the dppy ligand connected to the Au atom in the complex 4, whereas it connected to Pt atom in the complex 1. Both of complexes 2 and 3 are luminescent in solid stateand show the charg transfer bands in the UV-vis spectra at room temperature
Keywords:
Heteronuclear Complexes ; Crystallography ; Cyclometalated Complex ; Swapping

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