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Dynamic Electron Delocalization and Spin-Spin Interactions in Redox-Active Organic Polygons

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My research interests, which span organic, inorganic, physical and biochemistry, have focused broadly on photo-, magneto- and redox-active molecules, especially those with potential applications in organic photovoltaics, spintronics and electronics. My research under the joint supervision of Professor Wasielewski and Professor Fraser Stoddart has concentrated upon understanding electronic and magnetic coupling among multiple chromophoric and redox units in rigid and well-defined molecular architectures. We have reported on the synthesis, characterization and application of a series of chiral shape-persistent macrocycles comprising two, three, four and six equivalent rylene diimide units. We have investigated how the molecular geometry of redox-active diimides within these molecular “polygons” affects the physical properties associated with (i) through-space electron sharing, (ii) excited-state dynamics, (iii) electron spin-spin coupling, (iv) cooperative solid-state packing and (v) unusual redox behavior. These investigations demonstrated the potential of shape-persistent diimide-based macrocycles to carry out long distance electron transport required for organic electronics and photovoltaic applications. Currently, I am also investigating the role of electron sharing on photoinduced electron transfer reactions and related spin coherence effects by utilizing these macrocycles as electron acceptors.

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  • 01/16/2019
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