Managing Protons and Electrons in Small Molecule Activation

Seminar | October 25 | 4-5 p.m. | 120 Latimer Hall

 Abhishek Dey, School of Chemical Science, Indian Association for the Cultivation of Science

 College of Chemistry

Small molecule activation often requires both protons and electrons. This includes chemical transformations key to sustainable energy and environment e.g. reduction of H+, O2, CO2 and N2. Similarly, mono-oxygenation of organic molecules using molecular oxygen, a process often described as the Holy grail of chemistry, requires protons and electrons. Erstwhile mechanistic investigations on metallo-enzyme active sites which catalyses these reactions have revealed that the proton and electron delivery often occur in distinct chemical steps and in many cases, coupled, in the same steps. This talk to focus on control of proton and electron delivery in synthetic inorganic molecular catalysts to achieve efficient catalysis using a combination of synthesis, self-assembly, in-situ spectroscopy and electrochemistry. This includes catalysts for hydrogen generation, oxygen reduction, organic substrate oxidation using O2 and CO2 reduction; all under aqueous environment and ambient conditions.

References:
1. M. Mukherjee, A. Dey Central Science 2019, 5, 671
2. A. Ghatak, S. Bhunia, A. Dey Chemical Science, 2019, DOI: 10.1039/C9SC02711D
3. S. Bhunia, A. Rana, P. Roy, D. J. Martin, M. L. Pegis, B. Roy, A. Dey J. Am. Chem. Soc. 2018, 9444-9457.
4. Md. E. Ahmed, S. Dey, M. Y. Daresbourgh, A. Dey J. Am. Chem. Soc. 2018, 140, 9444-9457
5. S. Chatterjee, K. Sengupta, B. Mondal, S. Dey, A. Dey, Acc. Chem. Res. 2017, 50, 1744

 510-643-0572