Cofacial Assembly of Metallomacrocycles. A Molecular Engineering Approach to Electrically Conductive Polymers.
Abstract
This paper discusses a strategy to control molecular stacking interactions in low-dimensional mixed valence materials by locking partially oxidized metallomacrocycles together in a face-to-face orientation. Thus, doping of the cofacially linked oligomers (M(Pc)O)n M = Si, Ge, Sn; Pc = phthalocyaninato -- with halogen (I2, Br2) or quinone (e.g., TCNQ, DDQ) 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, and variable-temperature four-probe electrical conductivity. Evidence is presented that some of the polymers 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. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 13, 1981
- Accession Number
- ADA099520
Entities
People
- Carl W. Dirk
- Karl F. Schoch Jr.
- Tobin J. Marks
Organizations
- Northwestern University