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Novel Polydiacetylenes as Materials for Second and Third Order Nonlinear Optics.

Published online by Cambridge University Press:  16 February 2011

W. H. Kim ,
C. E. Masse ,
B. Bihari ,
J. Kumar  and
S. K. Tripathy
W. H. Kim
Affiliation:
University of Massachusetts-Lowell, Center for Advanced Materials, Department of Chemistry, Lowell, MA. 01854.
C. E. Masse
Affiliation:
University of Massachusetts-Lowell, Center for Advanced Materials, Department of Chemistry, Lowell, MA. 01854.
B. Bihari
Affiliation:
University of Massachusetts-Lowell, Center for Advanced Materials, Department of Physics, Lowell, MA. 01854.
J. Kumar
Affiliation:
University of Massachusetts-Lowell, Center for Advanced Materials, Department of Physics, Lowell, MA. 01854.
S. K. Tripathy
Affiliation:
University of Massachusetts-Lowell, Center for Advanced Materials, Department of Chemistry, Lowell, MA. 01854.
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Abstract

The objective of this investigation was to develop stable nonlinear optical (NLO) Materials which possess both second and third order NLO properties. These Materials were envisioned as having a polydiacetylene (PDA) backbone with a second order active NLO chromophoric substituent consisting of a donor group, a π-conjugated bridge, and an acceptor group. The choice of a PDA backbone in this investigation was twofold. In terms of third order NLO properties, the extensive π-conjugation of the PDA backbone leads to large ultrafast third order effects. In terms of second order NLO properties, the high thermal stability and rigidity of the PDA Matrix in a perfect polymeric single crystal is expected to prevent the randomization of the NLO chromophores in the noncentrosymmetric environment. This paper focuses on the synthesis and NLO properties of the unsymmetrical diacetylene Monomers, ((9-Butoxy carbonyl) Methyl urethanyl) -l- (4-urethanyl-4'-nitrobiphenyl) -nona-2,4-diyne, and ((9-Butoxy carbonyl) Methyl urethanyl) -l- (4-urethanyl-4'-nitroazobenzene) -nona-2,4-diyne. The high entropy flexible urethanyl side group was chosen to satisfy the monomer packing requirements for polymerization and enhance the solubility of the PDAs.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 328: Symposium Q – Electrical, Optical, and Magnetic Properties of Organic Solid State Materials , 1993 , 667
Copyright
Copyright © Materials Research Society 1994

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References

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