Tokyo Tech News

Chemical transformation of carbon dioxide: Copper diphosphine complexes as catalysts for hydrosilylation


Published: November 8, 2013

Since carbon dioxide (CO2) is an abundant carbon source, the catalytic transformation of CO2 into valuable chemicals is one of the most important technologies to achieve a sustainable society.

However, the transformation of CO2 is difficult due to its high stability.

Now, Ken Motokura, Toshihide Baba, and colleagues at Department of Environmental Chemistry and Engineering, Tokyo Institute of Technology have found that Cu-diphosphine complexes can be highly active catalysts for hydrosilylation of CO2 to silyl formate, which is potentially a useful compound for further transformation into fine chemicals.

The catalytic reaction procedure is as follows: a Cu source, diphosphine ligand, hydrosilane, and 1,4-dioxane solvent were placed into a glass reactor equipped with balloon under one atmosphere of CO2, and the resulting mixture was vigorously stirred at 60℃.

The turnover number (TON) and turnover frequency (TOF) of the Cu catalyst reached a maximum of 70000 and 10300 h-1, respectively, with 1,2-bis(diisopropylphosphino) benzene as a ligand.

These TON and TOF values are more than one-order of magnitude higher than those of previously reported catalysts for hydrosilylation of CO2.

Hydrosilylation of CO2 catalyzed by Cu-diphosphine complex.

  • Authors:Ken Motokura, Daiki Kashiwame, Naoki Takahashi, Akimitsu Miyaji, and Toshihide Baba.
  • Title of original paper:Highly active and selective catalysis of copper diphosphine complexes for the transformation of carbon dioxide into silyl formate.
  • Journal, volume, pages and year:Chemistry - A European Journal 19, 10030 (2013).
  • Digital Object Identifier (DOI):10.1002/chem.201300935 outer
  • Affiliations:Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology.