Production of highly ordered organic conducting polymers (poly(3-methylthiophene)) under electrochemical inclusion of Cu/sup 2 +/ ions: an ESR study

Journal Article · Thu Oct 23 04:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100280a016· OSTI ID:6954444

Gourier, D; Tourillon, G

ESR studies of poly(3-methylthiophene) (PMeT) doped with SO/sub 3/CF/sub 3/ anions and with various amounts of Cu/sup 2 +/ ions are reported. The SO/sub 3/CF/sub 3/ doped PMeT has the characteristics of a metallic state: Dysonian line shape with a Pauli spin paramagnetism. When cathodically polarized in an aqueous copper solution, its conductivity increases by a factor of nearly 3 and is accompanied by an increase of the conduction electron spin resonance (CESR) line width. The features of the Cu/sup 2 +/ spectra depend on the cathodic polarization time. (i) For very short times (1 less than or equal to t less than or equal to 50 s), isolated Cu/sup 7 +/ ions in a strongly axially distorted octahedral environment are detected, with each ion surrounded by four water molecules and by two methylthiophene units (Cu/sup 2 +/(H/sup 2/O)/sub 4/(MeT)/sub 2/, complexation by sulfur atoms). This configuration leads to the bridging of the neighboring PMeT chains by the Cu/sup 2 +/ ions and consequently to the formation of a bidimensional system, which increases the interchain hopping rate. (ii) For a longer cathodic polarization time, Cu/sup 2 +/ clusters are formed which do not modify or affect either the ordering or the electrical properties of the polymer.

• Research Organization: Ecole Nationale Superieure de Chimie de Paris, France
• OSTI ID: 6954444
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:22; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
CATIONS
CHARGED PARTICLES
COPPER COMPOUNDS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
IONS
MAGNETIC RESONANCE
MAGNETISM
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PARAMAGNETISM
PHYSICAL PROPERTIES
POLYMERS
RESONANCE
THIOPHENE
TRANSITION ELEMENT COMPOUNDS