Effect of chain length on the conductivity of polyacetylene. Potential dependence of the conductivity of a series of polyenes prepared by a living polymerization method

Journal Article · · Chemistry of Materials; (United States)

DOI:https://doi.org/10.1021/cm00024a047· OSTI ID:6838817

Park, L Y; Ofer, D; Gardner, T J; Schrock, R R; Wrighton, M S ^[1]

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1. Massachusetts Institute of Technology, Cambridge (United States)

The controlled ring-opening metathesis polymerization of 7,8-bis(trifluoromethyl)tricyclo[4.2.2.0[sup 2,5]]-deca-3,7,9-triene has been employed to prepare soluble polymers of low polydispersity that are precursors to polyenes. Films of these precursor polymers have been cast from solution onto platinum microelectrode arrays and have been heated to form films of polyacetylene in the molecular weight range 400-6500. These films have been characterized by in situ measurements of conductivity as a function of electrochemical potential in liquid SO[sub 2]/electrolyte. The results show a steady increase in conductivity with average chain length for samples with chain lengths in the range 11-60 double bonds, above which conductivity levels off as chain length continues to increase. All samples exhibit a finite potential window of conductivity which increases in width in the range 11-60 double bonds and does not change further with increasing chain length. 43 refs., 5 figs., 2 tabs.

• OSTI ID: 6838817
• Journal Information: Chemistry of Materials; (United States), Journal Name: Chemistry of Materials; (United States) Vol. 4:6; ISSN CMATEX; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
360606 -- Other Materials-- Physical Properties-- (1992-)
CHEMICAL REACTIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HYDROCARBONS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
POLYACETYLENES
POLYENES
POLYMERIZATION
POLYMERS