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Light emission from ionic NHC-cycloplatinated compounds

AuthorsChueca, Andrés J.; Fuertes, Sara CSIC ORCID; Sicilia, Violeta CSIC ORCID
Issue Date2015
CitationXII Simposio de Investigadores Jóvenes RSEQ Sigma-Aldrich (2015)
AbstractThe use of [{Pt(μ-­‐Cl)(η3-­‐2-­‐Me-­‐C3H4)}2] as starting material allowed to accomplish a step by step cyclometallation of the NHCs through the intermediate carbene complexes [PtCl(η3-2-­Me‐C3H4)(HC^C*‐κC*)] (1A, HC^C*‐κC*=1‐(4‐cyanophenyl)‐3‐methyl‐1H‐imidazol-­2-­ylidene (A); 1B, HC^C*-­κC*= 3-­methyl‐1‐(naphthalen‐2‐yl)‐1H‐imidazol‐2‐ ylidene (B)), to give two new NHC‐cyclometallated compounds, [{Pt(μ‐Cl)(C^C*)}2] (HC^C*‐κC*= A (2A), B (2B)). Compounds 2A/2B were used as precursors to get the highly luminescent compounds (NBu4)[Pt(C^C*)(CN)2] (HC^C*‐κC*= A (3A), B (3B)) and [Pt(C^C*)(CNR)2]PF6 (HC^C*‐κC*= A, R = 2,6‐dimethylphenyl (4A), tBu (5A); B, R = 2,6-­dimethylphenyl (4B), tBu (5B)). Differences in the luminescent behavior of 3A/B-5A/B were found by modification of both the NHC and the ancillary ligands. To see, solid samples of compounds 3A and 3B show blue and yellow intense phosphorescence respectively (F ≈ 60%) upon excitation at λexc = 365 nm. On the other hand, the color modulation can be achieved by changing the ancillary ligands, as shown for compounds 4A/B-­5A/B. TD-­ DFT calculations for a better insight in the optical properties of these derivatives have been performed.
DescriptionResumen del póster presentado al XII Simposio de Investigadores Jóvenes de la Real Sociedad Española de Química Sigma-Aldrich, celebrado en Barcelona del 3 al 6 de noviembre de 2015.
Appears in Collections:(ISQCH) Comunicaciones congresos

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