Highly Ordered Thin Fims of Polyheterocycles: A Synchrotron Radiation Study of Polypyrrole and Polythiophene Langmuir-Blodgett Films
Abstract
Langmuir-Blodgett films have been made with 3-n-hexadecylpyrrole and 3-n-octadecylpyrrole monomers and copolymers with unsubstituted pyrrole made by chemical polymerization at the air-water interface on a subphase containing Ferric Chloride. Langmuir-Blodgett films consisting of mixtures of stearic acid and alkylsubstituted polythiophenes have also been made as bilayer films. The orientation of single and multilayer films on platinum substrates have been studied by Near Edge X-ray Absorption Fine Structure Spectroscopy which also gives information about charge transfer interactions between the aromatic groups and the metallic substrates. The alkylsubstituted pyrroles form highly ordered two-dimensional structures. FeCl3 initiated copolymerization with unsubstituted pyrrole leads to a more disordered system. In the case of polythiophene-stearic acid bilayers, the stearic acid layers are highly ordered. The poly(alkyl thiophene) layers sandwiched between stearic acid layers, on the other hand, exhibit random orientation of the thiophene moieties.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 1989
- Accession Number
- ADA210513
Entities
People
- J. Cher
- K. Hong
- L. Samuelson
- M. F. Rubner
- M. L. Denboer
- P. D. Hale
- S. K. Tripathy
- T. A. Skotheim
- T. Inagaki
- Xuezong Yang
- Y. Okamoto