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Identifier

000378654

Title

Αναγωγικές διεργασίες καρβονυλικών και νιτρο ενώσεων καταλυόμενες από νανοσωματίδια Au

Alternative Title

Facile reproductive processes of carbon and nitro compounds catalyzed by Au nanoparticles

Author

Βασιλικογιαννάκη, Ελένη Β

Thesis advisor

Στρατάκης, Εμμανουήλ

Reviewer

Ορφανόπουλος, Μιχαήλ
Κατερινόπουλος, Χαράλαμπος

Abstract

In the present thesis, we studied the hydrosilylation of carbonyl compounds by hydrosilanes, catalyzed by gold nanoparticles (Au NPs) supported on TiO₂, as well as, the reduction of nitro compounds by the ammonia-borane complex (NH₃BH₃), also catalyzed by Au/TiO₂. • We found that Au/TiO₂ (0.5 mol%) catalyzes the hydrosilylation of carbonyl compounds in the presence of 1,1,3,3-tetramethyldisiloxane (TMDS) in excellent yields and at rates >10 times faster relative to simple hydrosilanes. • For the first time in the literature Au/TiO₂ (0.1 mol%, even at ppm loading level) catalyzes the fast and quantitative reduction of nitroarenes into anilines and nitroalkanes into alkyl hydroxylamines by the ammonia-borane complex (NH₃BH₃) in excellent yields. NH₃BH₃ is used in very low excess (1.5 equivalents), in contrast to previous studies which utilize NaBH₄ in more than two orders of magnitude fold molar excess.

Language

Greek

Subject

Ammonia-Borane Complex

Carbonyl Compounds

Gold Nanoparticles

Heterogeneous Catalysis

Hydrosilanes

Hydrosilylation

Reduction

Tetramethyldisiloxane

Αναγωγή