Solvent Effect on Linear Photophysical Properties of a Two Photon Absorbing Dye

POSTER

Abstract

The nonlinear photophysical properties of two-photon absorbing materials have been of great interest but have not been well understood. The Air Force Research Laboratory has developed a two-photon absorbing dye termed AF240 which consists of an electron donating group linked to a $\pi $-conjugated center then to an electron withdrawing group. A solvent study was undertaken in which AF240 was investigated in order to determine the effect of solvent on the linear photophysical properties. These properties include the ground state molar absorption coefficient, steady-state emission, time resolved emission utilizing time correlated single photon counting, and triplet absorbance spectra. The ground state and triplet absorbance spectra indicate a slight red shift due to an increase of polarity of the solvent. Dramatic red shifts in the steady state emission also have been observed which result from an increase in the polarity of the solvent. The formation of an intramolecular charge transfer (ICT) state has been observed and determined to be the origin of these changes with solvent.

Authors

  • Jennifer Monahan

    AFRL/RX, SOCHE, WSU-Chemistry Dept

  • Joy Rogers-Haley

    AFRL/RX, UES Inc.

  • Jonathan Slagle

    AFRL/RX, AT\&T Government Solutions

  • Doug Petkie

    AFRL/RX, AFRL/RX, Systran Systems Inc, UCSD, Los Alamos National Laboratory, Ohio Northern University, BFS, Germany, Florida State University, Monmouth College, Ohio Wesleyan University, Department of Chemical and Biomolecular Engineering, The University of Akron, Physics Department, John Carroll University, Department of Chemistry, Knight Chemical Laboratories, The University of Akron, Australian National University, Miami University, Oxford, OH, University of Cincinnati, University of Findlay, Naval Research Laboratory, Washington, DC 20375, Cleveland State University, Health Sciences Dept, Cleveland State University, Physics Dept, Cleveland State University, Bucknell University, Wright State University, Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB, Wright State University, Department of Physics, University of Puerto Rico, Department of Mechanical Engineer, Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB and UES, Inc., Department of Environmental Science and Policy, School of Science, Marist College, Poughkeepsie, NY 12601, USA, AFRL/711 HPW, EPA Sustainable Technology Division, University of Akron, Rose-Hulman Institute of Technology, Harvard University, LSU, Ohio University, Wittenberg University, Student

  • Doug Petkie

    AFRL/RX, AFRL/RX, Systran Systems Inc, UCSD, Los Alamos National Laboratory, Ohio Northern University, BFS, Germany, Florida State University, Monmouth College, Ohio Wesleyan University, Department of Chemical and Biomolecular Engineering, The University of Akron, Physics Department, John Carroll University, Department of Chemistry, Knight Chemical Laboratories, The University of Akron, Australian National University, Miami University, Oxford, OH, University of Cincinnati, University of Findlay, Naval Research Laboratory, Washington, DC 20375, Cleveland State University, Health Sciences Dept, Cleveland State University, Physics Dept, Cleveland State University, Bucknell University, Wright State University, Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB, Wright State University, Department of Physics, University of Puerto Rico, Department of Mechanical Engineer, Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB and UES, Inc., Department of Environmental Science and Policy, School of Science, Marist College, Poughkeepsie, NY 12601, USA, AFRL/711 HPW, EPA Sustainable Technology Division, University of Akron, Rose-Hulman Institute of Technology, Harvard University, LSU, Ohio University, Wittenberg University, Student

  • Augustine Urbas

    AFRL/RX