Manipulating singlet-triplet equilibrium in organic biradical materials

ORAL

Abstract

We investigated the tunability of the singlet-triplet equilibrium population in 1,4-phenylenedinitrene via magneto-optical spectroscopy. Both temperature- and magnetic field-induced spectral changes in this organic biradical are sensitive to magnetic energy scales, specifically the spin gap, demonstrating the important interplay between charge, and magnetism in this system. These measurements also establish the value of local-probe photophysical techniques for extraction of magnetic properties data in systems where a traditional Curie law analysis has intrinsic limitations. *This work is supported by the National Science Foundation.

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Authors

  • O. Gunaydin-Sen

    University of Tennessee

  • J. Fosso-Tande

    University of Tennessee

  • P. Chen

    University of Tennessee

  • J.L. White

    University of Tennessee

  • J.L. Musfeldt

    University of Tennessee

  • R.J. Harrison

    University of Tennessee and Oak Ridge National Laboratory

  • T.L. Allen

    University of Massachusetts

  • P.M. Lahti

    University of Massachusetts

  • J.G. Cherian

    National High Magnetic Field Laboratory, Department of Physics, Florida State University, Tallahassee, Florida 32310

  • T. Tokumoto

    National High Magnetic Field Laboratory

  • S.A. McGill

    National High Magnetic Field Laboratory, National High Magnetic Field Laboratory, Tallahassee, FL, National High Magnetic Field Lab, Florida State University, Tallahassee, Florida 32310