A structural, electronic and electrochemical study of polypyrrole as a function of oxidation state (Record no. 43012)

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control field MX-MdCICY
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20250625124725.0
040 ## - CATALOGING SOURCE
Transcribing agency CICY
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-8710
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Title A structural, electronic and electrochemical study of polypyrrole as a function of oxidation state
490 0# - SERIES STATEMENT
Volume/sequential designation Synthetic Metals, 156(9), p.724-730, 2006
520 3# - SUMMARY, ETC.
Summary, etc. The electronic, structural, and chemical properties of polypyrrole doped with the hexafluorophosphate ion are investigated as a function of oxidation state. These properties are found to be highly correlated; specifically, they all experience a rapid transition at approximately -0.1V versus SCE. The electronic conductivity of the film changes by two orders of magnitude through the transition potential, in the well-known opinginduced metal-insulator transition. Also at -0.1V versus SCE, X-ray diffraction and macroscopic actuation measurements reveal a structural change in the polymer. Results suggest a loss of pi-stacking in the polymer crystals, and a reordering of the dopant ions in the matrix. The dopants appear to exist in an isotropic liquid-like state in the highly oxidized film, changing to a channel structure at the transition point. This change in structure is also consistent with the transition observed in the electrochemical impedance spectrum. The equilibrium charge on the polymer with oxidation state is consistent with a constant DC capacitance, however theAC impedance spectrum shows increased constant phase element behavior in the reduced state. This could be due to a greater range of diffusion constants in the reduced state, which we associate with the heterogeneous ion configuration.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element POLYPYRROLE
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element X-RAY DIFFRACTION
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element IMPEDANCE SPECTROSCOPY
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element METAL-INSULATOR TRANSITION
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Warren, M.R.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Madden, J.D.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/13DIAzrfM3nFRZV8JK4h8c4AQEW8T-Gc_/view?usp=drivesdk">https://drive.google.com/file/d/13DIAzrfM3nFRZV8JK4h8c4AQEW8T-Gc_/view?usp=drivesdk</a>
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Source of classification or shelving scheme Clasificación local
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-8710 25.06.2025 25.06.2025 Documentos solicitados