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978-3-8439-1654-7, Reihe Anorganische Chemie
Heteroarylsubstituierte Alkenolate von Palladium, Platin und Gold sowie deren Anwendung in der Synthese neuer wiederverwendbarer heterogener Katalysatoren mittels CVD-Verfahren
266 Seiten, Dissertation Universität Köln (2014), Softcover, A5
In this work some heteroarylsubstituted alkenol-ligands (N,O-ligands) have been used to synthesize new homo- and heteroleptic Pd, Pt, Au and Al complexes. The various possible coordinationsides of the heterocycles in the N,O-ligands was in the focus of this work. In all synthesized compounds the ligands coordinate to the metal center through the enolate-oxygen as well as the lewis-basic nitrogen of the heterocycles, regardless of the additional oxygen-, nitrogen or sulfuratom present in the heterocycles.
The perfluoroalkylgroups of the N,O-ligands ensure an adequate thermal stability and a high volatility of the complexes, which is significantly influenced by the chainlength of the perfluoroalkylgroups. Especially the synthesized heteroleptic allyl-alkenolate-palladium complexes as well as the dimethyl-alkenolate-gold complexes show an outstanding volatility which makes them interesting precursors for the application in chemical vapor deposition-techniques.
These compounds have been applied and the parameters optimized in the material synthesis of elemental noble metal films via thermal CVD and PECVD-methods. The thereby gained findings were employed in the deposition of palladium-particles on porous carbonized wood substrates (BioC) which then, in the scope of more sustainable syntheses, were used as recyclable heterogeneous catalysts in C-C-coupling reactions (Heck-Mizoroki- and Suzuki-Miyaura-reaction).