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Zhaofu Fei answers a few questions about this month's
new hot paper in the field of Chemistry.
From
•>>July 2006
Field:
Chemistry
Article Title: Nitrile-functionalized pyridinium ionic
liquids: Synthesis, characterization, and their application in carbon - Carbon coupling reactions
Authors: Zhao, DB;Fei,
ZF;Geldbach, TJ;Scopelliti, R;Dyson, PJ
Journal: J AM CHEM SOC
Volume: 126
Issue: 48
Page: 15876-15882
Year: DEC 8 2004
* Ecole Polytech Fed Lausanne, Inst Sci & Ingn Chim, BCH, CH-1015 Lausanne, Switzerland.
* Ecole Polytech Fed Lausanne, Inst Sci & Ingn Chim, BCH, CH-1015 Lausanne, Switzerland.
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Why
do you think your paper is highly cited?
I think that our work is often cited because we have established
conceptually a new strategy in the design of functionalized ionic
liquids (ILs) and their applications in nanoparticle stabilization
and catalysis. That is, using weak coordinating ILs to immobilize
the essential catalyst, which in our case are palladium
nanoparticles.
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“This is indeed a very interesting new discovery that weak coordinating
ionic liquids can stabilize palladium nanoparticles such that excellent immobilization of the effective catalyst can be achieved.”
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Before our work, there were many organic reactions being
investigated in "standard" ionic liquids and the active
catalyst species remained elusive. Using our weakly-coordinating
ionic liquids, we were able to look carefully at the catalytic
mechanism and study all the factors that the systems involved.
Does
it describe a new discovery, methodology, or synthesis of knowledge?
This is indeed quite an interesting new discovery; in that weak,
coordinating ILs can stabilize palladium nanoparticles, in such a
way that excellent immobilization of the effective catalyst can be
achieved. The discovery provides a new methodology for those wishing
to design or to use catalysts superior to those currently in use.
Could
you summarize the significance of your paper in layman’s terms?
We designed an IL that acts as solvent and stabilizer for
nanoparticles. The liquid increases the stability of the catalyst,
prevents leaching of the catalyst, and therefore improves its
lifespan significantly. Since the liquid does not evaporate, the
process can be considered as very green.
How
did you become involved in this research, and were there obstacles
along the way?
IL chemistry, nanoparticle catalyst reservoirs, and CC coupling
reactions are not new. Prior to this research, we knew that an ideal
catalytic system should enable efficient catalyst immobilization
with high activity. We realized the novel properties of
functionalized ILs and introduced weakly coordinating CN groups.
In this paper, we demonstrated, experimentally, the advantages of
using weakly coordinating ILs to replace traditional ILs with more
effective catalyst immobilization and stabilization. ILs and
nanoscience are two popular areas that are attracting considerable
attention. However, there are only a very few reports that could
actually have potential applications within the industry in the near
future.
Are
there any social or political implications for your research?
Our concept could be used in the industry as a means for
developing more efficient catalytic systems and, in an effort to
reduce problems associated with solvent loss, e.g., climate change,
ozone depletion, and health problems. Currently, we—along with our
partner, a leading chemical company—are exploring the
possibilities of using our functionalized ILs as alternative
solvents in a number of industrial processes.
Dr. Zhaofu Fei
Senior Research Scientist
Prof. Paul Dyson Group
Swiss Federal Institute of Technology
Lausanne, Switzerland
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ESI Special Topics,
July 2006
Citing URL - http://www.esi-topics.com/nhp/2006/july-06-ZhaofuFei.html
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