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Understanding photophysics of a high concentration platinum (II) chromophore in epoxy
Author(s): Joy E. Haley; Douglas M. Krein; David J. Stewart; Rachel N. Renkel; Jonathan E. Slagle; Thomas M. Cooper
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Paper Abstract

It is well known in the literature that for a two photon nonlinear absorbing dye to be the most effective, high concentrations are needed. The problem is that most photophysical studies in solution are done at low concentration and in a solution. These low concentration studies are important for understanding inherent materials properties but it is also important to understand what happens in a material at high concentration. In addition to this, efforts have been made to study the effects of incorporating a dye into a solid matrix environment to better understand the constraints this environment has to a given material. Preliminary results for an epoxy system reveal the formation of excimers (excited state dimers) with an increase in concentration. Excimers are forming from the triplet excited state of the E1-BTF. A rate constant for this formation is 2.6 × 105 M-1 s-1. While rather slow, at greater than 50 mM concentration the excimer is readily formed with <90% efficiency. This must be considered when making nonlinear absorption measurements since the excimer will certainly contribute to the overall nonlinearity.

Paper Details

Date Published: 27 February 2019
PDF: 6 pages
Proc. SPIE 10915, Organic Photonic Materials and Devices XXI, 109150N (27 February 2019); doi: 10.1117/12.2506424
Show Author Affiliations
Joy E. Haley, Air Force Research Lab. (United States)
Douglas M. Krein, Air Force Research Lab. (United States)
General Dynamics Information Technology (United States)
David J. Stewart, Air Force Research Lab. (United States)
General Dyanamics Information Technology (United States)
Rachel N. Renkel, Air Force Research Lab. (United States)
Southwestern Ohio Council for Higher Education (United States)
Jonathan E. Slagle, Air Force Research Lab. (United States)
UES, Inc. (United States)
Thomas M. Cooper, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 10915:
Organic Photonic Materials and Devices XXI
Christopher E. Tabor; François Kajzar; Toshikuni Kaino, Editor(s)

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