کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1320881 | 1499856 | 2015 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and structure of the cyclometalated hetero-binuclear Pt-Au complexes with bridging 2-diphenylphosphinopyridine ligand Synthesis and structure of the cyclometalated hetero-binuclear Pt-Au complexes with bridging 2-diphenylphosphinopyridine ligand](/preview/png/1320881.png)
• Heterobinuclear cyclometalated platinum(II)-gold(I) complexes have been synthesized.
• Structure of these complexes characterized in solid state and solution. They show Pt–Au dative bonds.
• Absorption spectra of these complexes obtained and their transitions assigned using DFT and TD-DFT calculations.
The heterobinuclear cyclometalated PtII-AuI complexes of the type [MePt(bhq)(μ-dppy)AuL]PF6, in which, bhq = benzo{h}quinoline, dppy = 2-diphenylphosphinopyridine, L = PPh3, 5; PPh2Me, 6; PPhMe2, 7; have been prepared by reaction of the mononuclear platinum(II) complex [MePt(bhq)(dppy)], 1, with 1 equiv. [AuL]+. Also, the reaction of complex 1 with 1 equiv AuCl(SMe2) at −60 °C gave the neutral heterobinuclear complex [MePt(bhq)(μ-dppy)AuCl], 8. All of the complexes were characterized using NMR spectroscopy and elemental microanalysis and complexes 5 and 8 were further identified by single crystal X-ray structure determination. Time-dependent density functional theory (TD-DFT) is used to elucidate the origin of the electronic transitions in the heteronuclear complexes5 and 8. The low energy absorptions for the heterobinuclear complex 5 are attributed to an admixture of ligand-to-ligand charge transfer (1LL′CT) and metal-to-ligand charge transfer character (1MLCT).
Neutral and cationic heterobinuclear cyclometalated platinum(II)-gold(I) complexes containing bridging bis(diphenylphosphino)pyridine(dppy) ligand have been prepared and their structures characterized. These complexes show swapping of dppy ligand.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 786, 15 June 2015, Pages 14–20