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Multi-layered, covalently supported ionic liquid phase (mlc-SILP) as highly cross-linked support for recyclable palladium catalysts for the suzuki reaction in aqueous medium
- Source :
- Advanced synthesis & catalysis, 353 (2011): 2119–2130. doi:10.1002/adsc.201100186, info:cnr-pdr/source/autori:M. Gruttadauria, L.F. Liotta, A.M.P. Salvo, F. Giacalone, V. La Parola, C. Aprile, R. Noto/titolo:Multi layered covalently supported ionic liquid phase (mlc-SILP) as highly cross-linked support for recyclable palladium catalysts for the suzuki reaction in aqueos medium/doi:10.1002%2Fadsc.201100186/rivista:Advanced synthesis & catalysis (Print)/anno:2011/pagina_da:2119/pagina_a:2130/intervallo_pagine:2119–2130/volume:353
- Publication Year :
- 2011
- Publisher :
- Wiley-VCH Verlag, 2011.
-
Abstract
- The reaction between an excess of 1,4-bis(3-vinylimidazolium-1-yl) bromide and a mercaptopropyl-modified amorphous silica gel or ordered mesoporous silica SBA-15 in the presence of azobisisobutyronitrile (AIBN) afforded new materials, which have a high loading of imidazolium moieties. These materials, which contain a highly cross-linked polymeric network, have been denoted as multi-layered, covalently supported ionic liquid phase (mlc-SILP) and have been used as support for palladium catalysts containing a high loading of the metal (10 wt%). Such materials were characterized by several techniques (13C magic angle spinning nuclear magnetic resonance, the Brunauer–Emmett–Teller technique, small-angle X-ray scattering, X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy). The presence of a homogeneous distribution of palladium nanoparticles was established. The palladium catalysts displayed good activity allowing the synthesis of several biphenyl compounds in high yields working with only 0.1 mol% of palladium loading at mild temperatures (room temperature or 50 °C) in ethanol/water. Reactions carried out on a 10-mmol scale required only 10 mg of catalysts. Good recyclability was observed.
- Subjects :
- catalyst recycling
Inorganic chemistry
Azobisisobutyronitrile
chemistry.chemical_element
General Chemistry
Settore CHIM/06 - Chimica Organica
Mesoporous silica
palladium
Catalysis
Biphenyl compound
chemistry.chemical_compound
Suzuki reaction
chemistry
Ionic liquid
Magic angle spinning
Palladium
ionic liquid
Subjects
Details
- Language :
- English
- ISSN :
- 16154150
- Volume :
- 353
- Issue :
- 11-12
- Database :
- OpenAIRE
- Journal :
- Advanced Synthesis and Catalysis
- Accession number :
- edsair.doi.dedup.....71e6365054ad57e3b192fa0e6583607d