Details
| Original language | English |
|---|---|
| Pages (from-to) | 4781-4787 |
| Number of pages | 7 |
| Journal | Chemistry of Materials |
| Volume | 26 |
| Issue number | 16 |
| Publication status | Published - 26 Aug 2014 |
Abstract
A method for the preparation of silica microcapsules containing a high loading of ionic liquids (ILs) is described. The method paves the way to the conversion of ionic liquids into particulated materials, which results in ILs with new properties without changing their molecular structures. The synthesis of these new materials is based on the emulsification of ionic liquids in water, using surfactants or dispersants, and the resulting ionic liquid droplets are then confined in a silica shell formed via interfacial hydrolysis and polycondensation of tetraethoxysilane. This material can be isolated by centrifugation, followed by drying to yield a fine powder of ionic liquid-silica microcapsules, which are water and organic solvents redispersible. These new materials are utilized in the heterogenization of palladium catalyst and then applied in the hydrogenation of alkynes. The catalyst shows chemoselectivity in the hydrogenation of internal alkynes such as 4-octyne. Comparative studies have shown that the same catalyst loses this selectivity when it is applied under homogeneous conditions.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Chemical Engineering(all)
- General Chemical Engineering
- Materials Science(all)
- Materials Chemistry
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In: Chemistry of Materials, Vol. 26, No. 16, 26.08.2014, p. 4781-4787.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - BMIm-PF6@SiO2 Microcapsules
T2 - Particulated ionic liquid as a new material for the heterogenization of catalysts
AU - Weiss, Ester
AU - Dutta, Bishnu
AU - Kirschning, Andreas
AU - Abu-Reziq, Raed
N1 - Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2014/8/26
Y1 - 2014/8/26
N2 - A method for the preparation of silica microcapsules containing a high loading of ionic liquids (ILs) is described. The method paves the way to the conversion of ionic liquids into particulated materials, which results in ILs with new properties without changing their molecular structures. The synthesis of these new materials is based on the emulsification of ionic liquids in water, using surfactants or dispersants, and the resulting ionic liquid droplets are then confined in a silica shell formed via interfacial hydrolysis and polycondensation of tetraethoxysilane. This material can be isolated by centrifugation, followed by drying to yield a fine powder of ionic liquid-silica microcapsules, which are water and organic solvents redispersible. These new materials are utilized in the heterogenization of palladium catalyst and then applied in the hydrogenation of alkynes. The catalyst shows chemoselectivity in the hydrogenation of internal alkynes such as 4-octyne. Comparative studies have shown that the same catalyst loses this selectivity when it is applied under homogeneous conditions.
AB - A method for the preparation of silica microcapsules containing a high loading of ionic liquids (ILs) is described. The method paves the way to the conversion of ionic liquids into particulated materials, which results in ILs with new properties without changing their molecular structures. The synthesis of these new materials is based on the emulsification of ionic liquids in water, using surfactants or dispersants, and the resulting ionic liquid droplets are then confined in a silica shell formed via interfacial hydrolysis and polycondensation of tetraethoxysilane. This material can be isolated by centrifugation, followed by drying to yield a fine powder of ionic liquid-silica microcapsules, which are water and organic solvents redispersible. These new materials are utilized in the heterogenization of palladium catalyst and then applied in the hydrogenation of alkynes. The catalyst shows chemoselectivity in the hydrogenation of internal alkynes such as 4-octyne. Comparative studies have shown that the same catalyst loses this selectivity when it is applied under homogeneous conditions.
UR - http://www.scopus.com/inward/record.url?scp=84906707289&partnerID=8YFLogxK
U2 - 10.1021/cm501840d
DO - 10.1021/cm501840d
M3 - Article
AN - SCOPUS:84906707289
VL - 26
SP - 4781
EP - 4787
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 16
ER -