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- W2938752457 abstract "Platinum(II) complexes [Pt(C^C*)(acac)], where C^C* = 3-R-1-(phenyl-κC2)-1H-benzimidazol-2-ylidene-κC2 (R = Me, Ph) and acac = pentane-2,4-dionate, reacted with functionalized acetic acids YCH2CO2H (Y = NMe2, SMe and PPh2) with elimination of acetylacetone to produce the bis-chelate complexes of the type [Pt(C^C*)(YCH2CO2)]. Whereas the Pt(II) precursor with the less bulky methyl substituent (R) gave rise to single products having trans-C(NHC),Y geometry, its phenyl congener reacted less selectively, affording exclusively the product with trans-S,C(Ph) configuration for Y = SMe and mixtures of cis and trans isomers for Y = NMe2 and PPh2. These observations were well reproduced by different DFT functionals at the double-ξ level of theory, which suggested rather small energy differences between the geometric isomers. The photophysical measurements showed that complexes [Pt(C^C*)(YCH2CO2)] are emissive in the blue region (λem 460–490 nm) with photoluminescence quantum yields up to 36 % and emission lifetimes in the range of 3–5 µs." @default.
- W2938752457 created "2019-04-25" @default.
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- W2938752457 date "2019-04-08" @default.
- W2938752457 modified "2023-10-03" @default.
- W2938752457 title "Synthesis and Characterization of Cyclometalated NHC Platinum Complexes with Chelating Carboxylate Ligands" @default.
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- W2938752457 doi "https://doi.org/10.1002/ejic.201900216" @default.
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