Organic light-emitting diodes active materials

From the first synthesis of rare-earth /9-diketonates in 1897 by Urbain until now, hundreds of different complexes formed by reaction between Lnni ions and /3-diketone derivatives have been described in the literature. Interest for this type of complexes comes from then-potential application in numerous and diverse domains. These complexes can be used for example as extractants in solvent-solvent extraction processes or as active compounds for the development of chelate lasers or liquid lasers. But they can also find applications in NMR as shift reagents or as electroluminescent materials in organic light-emitting diodes (OLEDs) (Binnemans, 2005b). 

The interest in the oligomeric models of polyparaphenylenevinylene (PPV) is justified by the fact that this class of molecules (and their derivatives) are very relevant as active materials in the development of organic light-emitting diodes (see, e.g., Ref. 232). To increase solubil-... 

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