Abstract
Because of the relative ease to modify, functionalize, and synthesize polysiloxanes, these compounds offer interesting possibilities to greatly influence the properties of a catalytic system. These potentials are illustrated with three catalytic systems. In the first system, siloxane nanocages are shown to exhibit confinement effects by strongly modifying the protonation affinity of internal amine groups and by changing the activity and product selectivity in a reaction catalyzed by these groups. In the second example, the length of the siloxane backbone of a bis(pyridyl)siloxane ligand is shown to be critical both in stabilizing a Pd acetate complex catalyst in selective oxidation of benzyl alcohol, and in determining the dependence of the reaction rate on the pyridyl concentration in the reaction mixture. In the third example, polysiloxanes are shown to be useful in the preparation of a supported Pd catalyst in which the metal loading and particle size can be independently controlled.
| Original language | English |
|---|---|
| Pages (from-to) | 99-107 |
| Number of pages | 9 |
| Journal | Topics in Catalysis |
| Volume | 55 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Mar 2012 |
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Keywords
- Catalyst
- Confinement effect
- Polysiloxane
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)
Cite this
Polysiloxanes in catalysis and catalyst preparation : Opportunities for control of catalytic processes. / Missaghi, Michael N.; Kung, Mayfair C.; Kung, Harold H.
In: Topics in Catalysis, Vol. 55, No. 1-2, 03.2012, p. 99-107.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Polysiloxanes in catalysis and catalyst preparation
T2 - Opportunities for control of catalytic processes
AU - Missaghi, Michael N.
AU - Kung, Mayfair C.
AU - Kung, Harold H
PY - 2012/3
Y1 - 2012/3
N2 - Because of the relative ease to modify, functionalize, and synthesize polysiloxanes, these compounds offer interesting possibilities to greatly influence the properties of a catalytic system. These potentials are illustrated with three catalytic systems. In the first system, siloxane nanocages are shown to exhibit confinement effects by strongly modifying the protonation affinity of internal amine groups and by changing the activity and product selectivity in a reaction catalyzed by these groups. In the second example, the length of the siloxane backbone of a bis(pyridyl)siloxane ligand is shown to be critical both in stabilizing a Pd acetate complex catalyst in selective oxidation of benzyl alcohol, and in determining the dependence of the reaction rate on the pyridyl concentration in the reaction mixture. In the third example, polysiloxanes are shown to be useful in the preparation of a supported Pd catalyst in which the metal loading and particle size can be independently controlled.
AB - Because of the relative ease to modify, functionalize, and synthesize polysiloxanes, these compounds offer interesting possibilities to greatly influence the properties of a catalytic system. These potentials are illustrated with three catalytic systems. In the first system, siloxane nanocages are shown to exhibit confinement effects by strongly modifying the protonation affinity of internal amine groups and by changing the activity and product selectivity in a reaction catalyzed by these groups. In the second example, the length of the siloxane backbone of a bis(pyridyl)siloxane ligand is shown to be critical both in stabilizing a Pd acetate complex catalyst in selective oxidation of benzyl alcohol, and in determining the dependence of the reaction rate on the pyridyl concentration in the reaction mixture. In the third example, polysiloxanes are shown to be useful in the preparation of a supported Pd catalyst in which the metal loading and particle size can be independently controlled.
KW - Catalyst
KW - Confinement effect
KW - Polysiloxane
UR - http://www.scopus.com/inward/record.url?scp=84882240528&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84882240528&partnerID=8YFLogxK
U2 - 10.1007/s11244-012-9778-2
DO - 10.1007/s11244-012-9778-2
M3 - Article
AN - SCOPUS:84882240528
VL - 55
SP - 99
EP - 107
JO - Topics in Catalysis
JF - Topics in Catalysis
SN - 1022-5528
IS - 1-2
ER -