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  • Raul Hernandez Sanchez, Ph.D.
    12/14/17 - 9:45 AM to 11:00 AM

    Department Seminar: Raúl Hernández Sánchez, Ph.D.

    Department Seminar

"Electronic structure manipulation: from inorganic clusters to organic semiconductors"

Mixed valence compounds have been recognized over the past five decades as a unique class of chemical compounds. Their distinctive spectral, electrochemical, physical and magnetic properties arise from electron delocalization into the sites with uneven valence. A primary consequence of this electron delocalization phenomena is the acquisition and stabilization of high spin multiplicities, as observed in certain dinuclear and polynuclear biological clusters. In the first part of this talk, I present the research work that extends the current knowledge on the analysis of synthetic mixed-valent clusters by systematically altering the coordination chemistry and redox states at well-defined synthetic polynuclear iron clusters. We demonstrate that with small variations on the solvation coordination sphere and redox state, one can transverse spin ground states from S = 0 to S = 11 at the same polynuclear species.

In the second part of this seminar, I will present our research work on nonaqueous batteries. Here I show the use of perylene diimide derivatives for stable battery cycling operation in organic media for more than three months with coulombic efficiencies exceeding 99.95%. Last, I will introduce our work on permanently porous organic semiconductors and their use as potential gas sensing devices. 

  • Event Details

    Location: 331 Smith Hall
    Host: Professor Thomas Hoye
    • Raúl Hernández Sánchez, Ph.D.
    • Department of Chemistry
    • Columbia University
    • New York