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Proceedings Paper

Synthesis and characterization of novel platinum acetylide oligomers
Author(s): Thomas M. Cooper; Douglas M. Krein; Aaron R. Burke; Daniel G. McLean; Joy E. Rogers-Haley; Jonathan Slagle; Jennifer Monahan; Albert Fratini
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Paper Abstract

To develop a structure-spectroscopic property relationship in platinum acetylides having poly(aromatic hydrocarbon) ligands, we synthesized a series of chromophores with systematic variation in the number of fused aromatic rings(nFAR) and ligand topology(polyacene(L), polyphenanthrene(Z) or compact(C)). We measured ground state absorption, fluorescence and phosphorescence spectra. We also performed nanosecond and picosecond flash photolysis experiments. To extend the range of compounds in the structure-property relationship, we did DFT calculations on an expanded series of chromophores to calculate the S1 and T1 state energies. In both the DFT results and experiment, the ground state and phosphorescence spectra are a function of both nFAR and ligand topology. In the L chromophores, the S1 and T1 state energies decrease linearly with nFAR. In contrast the S1 and T1 state energies of the Z chromophores oscillate with increasing nFAR. The C chromophores have behavior intermediate between the L and Z chromophores. The picosecond transient spectra show complex behavior, having spectra reflecting intersystem crossing, vibrational cooling and solvent relaxation processes. The nanosecond transient spectra result from the T1 - Tn transition. The timeresolved spectra show no systematic variation with structure, showing more complex behavior than previously studied platinum acetylides having phenylene ethynylene ligands.

Paper Details

Date Published: 21 August 2009
PDF: 12 pages
Proc. SPIE 7413, Linear and Nonlinear Optics of Organic Materials IX, 74130E (21 August 2009); doi: 10.1117/12.829237
Show Author Affiliations
Thomas M. Cooper, Air Force Research Lab. (United States)
Douglas M. Krein, Air Force Research Lab. (United States)
General Dynamics Information Technology (United States)
Aaron R. Burke, Air Force Research Lab. (United States)
General Dynamics Information Technology (United States)
Daniel G. McLean, Air Force Research Lab. (United States)
SAIC (United States)
Joy E. Rogers-Haley, Air Force Research Lab. (United States)
UES, Inc. (United States)
Jonathan Slagle, Air Force Research Lab. (United States)
AT&T Government Solutions (United States)
Jennifer Monahan, Air Force Research Lab. (United States)
SOCHE Student Research Program (United States)
Albert Fratini, Univ. of Dayton (United States)


Published in SPIE Proceedings Vol. 7413:
Linear and Nonlinear Optics of Organic Materials IX
Theodore G. Goodson, Editor(s)

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