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New Hot Paper Comments

By Zhaofu Fei

ESI Special Topics, July 2006
Citing URL - http://www.esi-topics.com/nhp/2006/july-06-ZhaofuFei.html

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.

ST:  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.


“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.”

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.

ST:  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.

ST:  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.

ST:  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.

ST:  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.End

Dr. Zhaofu Fei
Senior Research Scientist 
Prof. Paul Dyson Group
Swiss Federal Institute of Technology
Lausanne, Switzerland

ESI Special Topics, July 2006
Citing URL - http://www.esi-topics.com/nhp/2006/july-06-ZhaofuFei.html

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