Palladium Nanoparticles Supported onto Ionic Carbon Nanotubes

doi:10.1055/s-2008-1072797

Synfacts 2008(6): 0651-0651
DOI: 10.1055/s-2008-1072797

Polymer-Supported Synthesis

Palladium Nanoparticles Supported onto Ionic Carbon Nanotubes

Rezensent(en):Yasuhiro Uozumi, Yutaka Matsuura

Y. S. Chun, J. Y. Shin, C. E. Song, S.-g Lee*
Ewha Womans University, Seoul and Sungkyunkwan University, Suwon, Korea
Palladium Nanoparticles Supported onto Ionic Carbon Nanotubes as Robust Recyclable Catalysts in an Ionic Liquid
Chem. Commun. 2008, 942-944

Abstract

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Key words

palladium nanoparticles - ionic carbon nanotubes - hydrogenation

Significance

An aqueous solution of IL-f-MWCNTs 1 and Na₂PdCl₄ was hydrogenated under 1 atm of H₂ pressure for 30 min at room temperature to give Pd/IL-f-MWCNTs 2a (eq. 1). Direct anion exchange of the hydrophilic Br anion with NTf₂ and SbF₆ afforded the hydrophobic Pd/IL-f-MWCNTs 2b and 2c, respectively (eq. 2). The catalytic activities of 2a-c were examined for the hydrogenation of trans-stilbene in MeOH. Pd/IL-f-MWCNT 2c with the SbF₆ anion showed superior catalytic activity compared to 2a and 2b (eq. 3).

Comment

In this paper, the authors reported imidazolium-functionalized ionic multi-walled carbon nanotube (IL-f-MWCNT)-supported Pd nanoparticles as a catalyst for the hydrogenation of olefins. Pd/IL-f-MWCNT 2c was effectively immobilized in an ionic liquid, [bmim][SbF₆], with extraordinary stability. Thus, 2c/[bmim][SbF₆] was recovered by simple phase separation, and reused ten times without any loss of catalytic activity.

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