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Lecturer ZHAO JIN
Ph.D., 2005, Technological University Munich, Germany
Contact Information
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Department of Chemistry, NUS
3 Science Drive 3
Singapore 117543
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Office: S8-05-07
Tel: (65)-6516-2675
Fax: (65)-6779-1691
Email: chmzhaoj@nus.edu.sg |
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Research Interests
Organo-molybdenum, tungsten and rhenium complexes and application in the oxidation catalysis
Some chiral Mo(VI)O2L3(Solv)- and Mo and W(VI)O2L4-type complexes have been used for the asymmetric epoxidation of olefins. The compound with the composition of Cp’M(CO)3X (M = Mo. W: X = alkyl, or Cl) have been used as precursors of Cp’Mo(VI)O2X or Cp’Mo(VI)O(O2) X-type complexes for the chiral and achiral epoxidatio of olefins. Some compounds of these type complexes have been heterogenized onto the surface of mesoporous molecular sieves such as MCM-41 and MCM-48. The synthesis of more efficient chiral complexes based on the system of Cp’M(CO)3X (M = Mo. W: X = alkyl) is still in progress.
   
In cooperation with Prof. Hor T. S. Andy and the research group of Prof. F. E. Kuehn in the Technological University Munich in Germany, I will focus on the development of a series of new MTO (methyltrioxorhenium) based and molybdenum(VI) based complexes to be used for the epoxidation of olefin and other oxidation catalyses involving waster-water treatment and renewable resources.
Transition Metal Catalysts for Olefin Oligomerization/Polymerization.
I am developing novel chromium und molybdenum based complexes with new type of ligands as catalysts for the oligomerization of ethylene. This work will be conducted in cooperation with Prof. Hor T. S. Andy and Dr. Weng Zhiqiang and is based on the successful application of some low-coordinated and low-valent nickel complexes containing iminoferrocenylphosphine ligand in the olefin oligomerization/polymerization.
Representative Publications
 "Chiral ansa-bridged n5- Cyclopentadienyl Molybdenum Complexes: Synthesis, Structure and Application in Asymmetric Olefin Epoxidation" J. Zhao, E. Herdtweck, F. E. Kuhn, J. Organomet. Chem., 2006, 691, 2199-2206 "Chiral Monomeric Organorhenium(VII) and Organomolybdenum(VI) Compounds as Catalysts for Chiral Olefin Epoxidation Reactions", F. E. Kuhn, J. Zhao, W. A. Herrmann, Tetrahedron Asym., 2005, 16(21), 3469-3479
"Cyclopentadienyl-Molybdenum Complexes with a Siloxane Functional Group as Models for Efficient Hetrogeneous Epoxidation Catalysts", J. Zhao, A. Sakthivel, A. M. Santos, F. E. Kuhn, Inorg. Chim. Acta , 2005, 358, 4201-4207
"Heterogenization of organometallic molybdenum complexes with siloxane functional groups and their catalytic application", Sakthivel, J. Zhao, M. Hanzlik, A. S. T. Chiang, W. A. Herrmann, F. E. Kuhn, Adv. Synth. Catal., 2005, 347, 473-483
"Molybdenum and Tungsten Complexes of Composition (n5-C5R5)MR'(CO)3 and Their Use as Olefin Epoxidation Catalyst Precursors", J. Zhao, A. M. Santos, E. Herdtweck, F. E. Kuhn, J. Mol. Catal. A. Chem., 2004, 222, 265-271
"Molybdenum(VI) cis-dioxo Complexes Bearing Sugar Derived Chiral Schiff-base Ligands: Synthesis, Characterization, and Catalytic Applications", J. Zhao, X-G. Zhou, A. M. Santos, E. Herdtweck, C. C. Romao, F. E. Kuhn, Dalton Trans, 2003, 3736-3742
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