Highly ordered thin films of polyheterocycles: A synchrotron radiation study of polypyrrole and polythiophene Langmuir-Blodgett films
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 FeCl/sub 3/. 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. FeCl/sub 3/ 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. 15 refs., 3 figs., 3 tabs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6743622
- Report Number(s):
- BNL-41736; CONF-880669-23; ON: DE89001107
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360602* -- Other Materials-- Structure & Phase Studies
ABSORPTION SPECTROSCOPY
AZOLES
BREMSSTRAHLUNG
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COPOLYMERS
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
FILMS
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
IRON CHLORIDES
IRON COMPOUNDS
LAYERS
METALS
MOLECULAR STRUCTURE
MONOCARBOXYLIC ACIDS
OCTADECANOIC ACID
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
ORIENTATION
PLATINUM
PLATINUM METALS
POLYMERIZATION
POLYMERS
PYRROLES
RADIATIONS
SPECTROSCOPY
SUBSTRATES
SYNCHROTRON RADIATION
THIN FILMS
THIOPHENE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS