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Palladium Nanoparticle Loaded Bifunctional Silica Hybrid Material: Preparation and Applications as Catalyst in Hydrogenation Reactions
Author(s) -
Surmiak Sabrina K.,
Doerenkamp Carsten,
Selter Philipp,
Peterlechner Martin,
Schäfer Andreas H.,
Eckert Hellmut,
Studer Armido
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201604508
Subject(s) - tetraethyl orthosilicate , bifunctional , mesoporous silica , catalysis , nanoparticle , hydrosilylation , palladium , triethoxysilane , romp , chemistry , organic chemistry , mesoporous material , ligand (biochemistry) , materials science , polymer chemistry , polymerization , metathesis , nanotechnology , polymer , biochemistry , receptor
Bifunctional mesoporous silica was prepared by co‐condensation of tetraethyl orthosilicate (TEOS) with functionalized organosilanes containing azides or alkoxyamines. Orthogonal functional groups at the particles were selectively addressed in subsequent chemical modifications through “click”‐chemistry (“click to ligand” strategy) and radical nitroxide exchange. Palladation with PdCl 2 delivered Pd nanoparticle‐loaded silica material bearing sulfoxides and additional aminoamides as stabilizing ligands by means of in situ reduction of the Pd II ‐salt. These functional particles were successfully applied to the hydrogenation of alkynes and alkenes. Aldehyde hydrodeoxygenation and benzyl ether cleavage were achieved with these hybrid catalysts under mild conditions. Particles were analyzed by IR, TEM/STEM, EDX, and solid‐state NMR spectroscopy.