Crystal Structures of Poly-Paraphenylene Oligomers Containing Pendant Phenyl Groups

Abstract

The molecules are nonplanar, in contrast to the planar structures found at room temperature for the unsubstituted polyphenyls. The oligomer axis does not align with any of the crystallographic axes. The pendant-oligomer bond, however does align with the longest crystallographic axes. The pendant torsion angle is greater than 45 degrees and increases with increasing chain length. Knowledge of molecular structure and crystal packing of oligomeric model compounds will be useful in further calculations of mechanical, optical, and electro-optical properties for the corresponding rigid-rod polymer structures. Polyphenyls, Poly-p-phenylenes, Crystal structure, Rigid-rod polymers, Conducting polymers.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1989
Accession Number
ADA218158

Entities

People

  • Albert V. Fratini
  • Kenneth N. Baker

Organizations

  • University of Dayton

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Air Force
  • Chemistry
  • Classification
  • Crystal Structure
  • Displacement
  • Laser Dyes
  • Materials
  • Materials Laboratories
  • Measurement
  • Molecules
  • Oligomers
  • Optical Properties
  • Planar Structures
  • Polymers
  • Rigid Rod Polymers
  • Rod Polymers
  • Universities

Fields of Study

  • Chemistry

Readers

  • Materials Science and Engineering.
  • Polymer Science and Technology