Register in advance for this webinar: https://univ-rennes1-fr.zoom.us/webinar/register/WN_ZDs4ShucSDeUa36Dk1sawA
Michael M. Haley is a Professor at the University of Oregon, departement of chemistry & biochelmistry.
" Polycyclic hydrocarbons that possess extended pi-conjugation are of tremendous interest because of their potential use in optical and electronic device applications. While a majority of studies have focused on acenes and their derivatives, these systems are susceptible to oxidative and photolytic degradation; thus, there is a pressing need for alternative, acene-like topologies.
This talk will present our synthetic, structural, computational and materials studies of a class of carbon-rich semiconducting molecules based on the indenofluorene (IF) skeleton. Access to the fully conjugated, 20 π-electron, formally antiaromatic system is accomplished via a variety of well-known organic reactions. Optimization of their synthesis now permits access to IF derivatives in multigram quantities. We have shown that thin films or single crystals of several different IF scaffolds can serve as an active layer in organic field effect transistors (OFETs). Current studies are focused on varying the antiaromaticity of the indacene unit by systematic alteration of the outer benzene groups with other aromatic units as well as on increasing the diradical character of the framework by expansion of the quinoidal core. "
Yann Trolez - yann [dot] trolezensc-rennes [dot] fr