Green Photoluminescence from Platinum(II) Complexes Bearing Silylacetylide Ligands

The synthesis, structural characterization, photoluminescence properties, and density functional theory analysis of three Pt(II) diimine complexes, Pt(dbbpy)(C⋮CR)2 [dbbpy = 4,4‘-di(tert-butyl-2,2‘-bipyridine; R = SiMe3, C⋮CSiMe3, or t-Bu], are presented. The Pt(dbbpy)(C⋮C-tBu)2 complex serves a...

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Bibliographic Details
Published in:Inorganic chemistry 2005-02, Vol.44 (3), p.471-473
Main Authors: Hua, Fei, Kinayyigit, Solen, Cable, John R, Castellano, Felix N
Format: Article
Language:English
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Summary:The synthesis, structural characterization, photoluminescence properties, and density functional theory analysis of three Pt(II) diimine complexes, Pt(dbbpy)(C⋮CR)2 [dbbpy = 4,4‘-di(tert-butyl-2,2‘-bipyridine; R = SiMe3, C⋮CSiMe3, or t-Bu], are presented. The Pt(dbbpy)(C⋮C-tBu)2 complex serves as a carbon-based ligand structure for which the photophysical properties of the two silicon-bearing complexes are compared in dichloromethane. Pt(dbbpy)(C⋮CSiMe3)2 and Pt(dbbpy)(C⋮CC⋮CSiMe3)2 display visible absorptions with strong green emission (λemmax = 526 and 524 nm, respectively) while Pt(dbbpy)(C⋮Ct-Bu)2 displays efficient, long-lived yellow emission (λemmax = 557 nm). Direct side by side comparisons of Pt(dbbpy)(C⋮CSiMe3)2 and Pt(dbbpy)(C⋮Ct-Bu)2 suggest that the difference in excited state energy results from the relative σ-donor strength of the acetylide ligands.
ISSN:0020-1669
1520-510X
DOI:10.1021/ic048498j