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Progress on Nonlinear Optical Chromophores and Polymers with Useful Nonlinearity and Thermal Stability

Published online by Cambridge University Press:  16 February 2011

R. J. Twieg ,
D. M. Burland ,
J. L. Hedrick ,
V. Y. Lee ,
R. D. Miller ,
C. R. Moylan ,
W. Volksen  and
C. A. Walsh
R. J. Twieg
Affiliation:
IBM Research Division, Almadan Research Center, San Jose, California 95120–6099
D. M. Burland
Affiliation:
IBM Research Division, Almadan Research Center, San Jose, California 95120–6099
J. L. Hedrick
Affiliation:
IBM Research Division, Almadan Research Center, San Jose, California 95120–6099
V. Y. Lee
Affiliation:
IBM Research Division, Almadan Research Center, San Jose, California 95120–6099
R. D. Miller
Affiliation:
IBM Research Division, Almadan Research Center, San Jose, California 95120–6099
C. R. Moylan
Affiliation:
IBM Research Division, Almadan Research Center, San Jose, California 95120–6099
W. Volksen
Affiliation:
IBM Research Division, Almadan Research Center, San Jose, California 95120–6099
C. A. Walsh
Affiliation:
IBM Research Division, Almadan Research Center, San Jose, California 95120–6099
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Abstract

Organic nonlinear optical (NLO) polymers must possess large and stable bulk nonlinear properties if they are to be of practical use. Numerous classes of NLO chromophores and polymers have already been evaluated but the selection process, particularly as related to stability issues, has been very stochastic in nature. If suitable chromophores are to be successfully identified their thermochemical degradation Mechanisms Must be elucidated and structural modifications introduced in a rational fashion. We have devised a protocol for the evaluation of NLO chromophores which involves initial screening by thermal analysis (DSC and TGA) and selected molecular hyperpolarizability (EFISH) analysis. The Most promising candidates are incorporated into thermoplastic polymer hosts where bulk nonlinear properties (dijand rij) and additional thermal stability properties are evaluated by spectroscopie Means (UV-VIS). Cyclicvoltammetry (CV) has been identified as a useful tool for evaluation of these chromophores; in the case of azobenzenes with aliphatic amine donor and a nitro acceptor a correlation between the thermal stability and oxidation potential has been found. The Most facile thermal degradation mechanism which occurs in these dyes has been identified and structural changes to the donor group have been introduced to avert the process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 328: Symposium Q – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials , 1993 , 421
Copyright
Copyright © Materials Research Society 1994

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References

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