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Characterization of Polyparaphenylene Subjected to Different Heat Treatment Temperatures

Published online by Cambridge University Press:  10 February 2011

S. D. M. Brown ,
M. J. Matthews ,
A. Marucci ,
M. A. Pimenta ,
M. S. Dresselhaus ,
M. Endo  and
T. Hiraoka
S. D. M. Brown
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
M. J. Matthews
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
A. Marucci
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
M. A. Pimenta
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139
M. S. Dresselhaus
Affiliation:
Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139
M. Endo
Affiliation:
School of Engineering, Shinshu University, Nagano, 380 Japan
T. Hiraoka
Affiliation:
School of Engineering, Shinshu University, Nagano, 380 Japan
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Abstract

We investigated the structural and electronic properties of samples of polyparaphenylene (PPP), derived from two synthesis methods (the Kovacic and Yamamoto methods). These samples have been subjected to different heat-treatment temperatures (650 °C ≤ THT ≤ 2000°C) and their properties are compared to the polymer prior to heat-treatment (THT=0°C). The photoluminescence (PL) spectra of heat-treated PPP based on the two synthesis methods reflects the differences in electronic structure of the starting polymers. The PL emission from the heat-treated Yamamoto polymer is quenched at much lower THT than from the Kovacic material. However, Raman spectra taken of the material resulting from heat-treatment of the polymer (using both preparation methods) indicate the presence of phonon modes for PPP in samples at THT up to 650°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 488: Symposium J – Electrical, Optical & Magnetic Properties of Organic IV , 1997 , 515
Copyright
Copyright © Materials Research Society 1998

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