Preparation and catalytic studies of palladium nanoparticles stabilized by dendritic phosphine ligand-functionalized silica

Jayamurugan, G. ; Umesh, C. P. ; Jayaraman, N. (2009) Preparation and catalytic studies of palladium nanoparticles stabilized by dendritic phosphine ligand-functionalized silica Journal of Molecular Catalysis A: Chemical, 307 (1-2). pp. 142-148. ISSN 1381-1169

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.molcata.2009.03.020

Abstract

Silica is a prominently utilized heterogeneous metal catalyst support. Functionalization of the silica with poly(ether imine) based dendritic phosphine ligand was conducted, in order to assess the efficacy of the dendritic phosphine in reactions facilitated by a silica supported metal catalyst. The phosphinated poly(ether imine) (PETIM) dendritic ligand was bound covalently to the functionalized silica. For this purpose, the phosphinated dendritic ligand containing an amine at the focal point was synthesized initially. Complexation of the dendritic phosphine functionalized silica with Pd(COD)Cl2 yielded Pd(II) complex, which was reduced subsequently to Pd(0), by conditioning with EtOH. The Pd metal nanoparticle thus formed was characterized by physical methods, and the spherical nanoparticles were found to have > 85% size distribution between 2 nm and 4 nm. The metal nanoparticle was tested as a hydrogenation catalyst of olefins. The catalyst could be recovered and recycled more than 10 times, without a loss in the catalytic efficiency.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Dendrimer; Heterogeneous Catalysis; Hydrogenation; Palladium Nanoparticle; Solid Support
ID Code:65998
Deposited On:20 Oct 2011 07:13
Last Modified:20 Oct 2011 07:13

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