Accession Number:

ADA110192

Title:

Rational Control of Electronic Structure and Lattice Architecture in Electrically Conducting Molecular/Macromolecular Assemblies.

Descriptive Note:

Interim rept.,

Corporate Author:

NORTHWESTERN UNIV EVANSTON IL DEPT OF CHEMISTRY

Report Date:

1981-12-23

Pagination or Media Count:

25.0

Abstract:

This article discusses an approach to control molecular stacking interactions in low-dimensional mixed molecular assemblies by locking partially oxidized metallomacrocycles together in a face-to-face orientation. Thus, doping of the cofacially linked polymers MPcO sub n M Si, Ge, Sn Pc phthalocyaninato with halogen I2, Br2 or quinone e.g., DDQ, TCNQ electron acceptors produces robust, electrically conductive polymers with a wide range of stoichiometries and properties. The new materials have been studied by a variety of physical methods including X-ray diffraction, resonance Raman and infrared spectroscopy, ESR, static magnetic susceptibility, variable-temperature four-probe d.c., electrical conductivity, and voltage-shorted compaction techniques. Evidence is presented that some of the macromolecules have metal-like conductivity in the stacking direction and that transport properties within the series can be readily manipulated by rational variation of lattice architecture e.g., the identity of the metal, M and acceptor characteristics. Insight into those acceptor properties which stabilize the mixed valent state is provided. Author

Subject Categories:

  • Plastics
  • Electricity and Magnetism
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE