Journal ArticleDOI
Electron spin resonance of polyacetylene and AsF5‐doped polyacetylene
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TLDR
The results of an electron spin resonance (ESR) study of trans-polyacetylene, before and after doping with AsF5, are reported in this paper, which indicates a Curie law susceptibility with approximately one unpaired electron per 3×103 carbon atoms in agreement with earlier studies.Abstract:
The results of an electron spin resonance (ESR) study of trans‐polyacetylene, before and after doping with AsF5, are reported. The undoped polymer exhibits a Lorentzian line (g=2.00263) indicative of motional narrowing from a mobile unpaired electron species. Measurement of the intensity indicates a Curie law susceptibility with approximately one unpaired electron per 3×103 carbon atoms in agreement with earlier studies. From these results and comparison with earlier data on the cis polymer, it is suggested that the ESR signal arises from a mobile defect in the π system. Utilizing an apparatus which allows in situ AsF5 doping of a polyacetylene sample in the microwave cavity, we have monitored the ESR signal during the doping process. The spin resonance line narrows and increases in intensity, with no detectable g shift, as the doping proceeds. At high doping levels the line becomes asymmetric with a characteristic Dysonian line shape consistent with metallic behavior.read more
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Book ChapterDOI
Solitons in polyacetylene
TL;DR: In this paper, a review of the chemical and physical properties of real polyacetylene is given and experimental results on electrical conductivity, magnetic behaviour, optical spectroscopy and photoconductivity are discussed in the context of soliton-like excitations.
Journal ArticleDOI
Comparative theoretical study of the doping of conjugated polymers: Polarons in polyacetylene and polyparaphenylene
TL;DR: In this article, the physicochemical properties of all-trans polyacetylene and polyparaphenylene have been investigated in the framework of the adiabatic H\"uckel Hamiltonian with $\ensuremath{sigma}$-bond compressibility.
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Designer coordination polymers: dimensional crossover architectures and proton conduction
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Synthesis and Physical Properties of Highly Sulfonated Polyaniline
TL;DR: In this paper, an extensive characterization and details of synthesis of a new form of sulfonated polyaniline (LEB-SPAN) which shows novel or significantly improved chemical and physical properties.
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Electrical transport in doped polyacetylene
TL;DR: In this article, the results of an experimental study of electrical conductivity and thermopower in doped polyacetylene are reported, where measurements on both as‐grown and partially oriented films doped with iodine and AsF5; [CH(AsF5)y]x and [CH[I3]x, where y covers the full doping range.
References
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Journal ArticleDOI
Electrical Conductivity in Doped Polyacetylene.
C. K. Chiang,C. R. Fincher,Yung Woo Park,Alan J. Heeger,H. Shirakawa,E. J. Louis,S. C. Gau,Alan G. MacDiarmid +7 more
TL;DR: In this paper, a metal-to-insulator transition at dopant concentrations near 1% was shown for polyacetylene, a new class of conducting polymers in which the electrical conductivity can be systematically and continuously varied over a range of eleven orders of magnitude.
Journal ArticleDOI
Simultaneous polymerization and formation of polyacetylene film on the surface of concentrated soluble Ziegler-type catalyst solution
TL;DR: In this article, a direct method of simultaneously polymerizing and forming acetylene monomer to produce uniformly thin films of polyacetylene was investigated in terms of catalyst system, catalyst concentration, and polymerization temperature.
Journal ArticleDOI
Electron Spin Resonance Absorption in Metals. II. Theory of Electron Diffusion and the Skin Effect
TL;DR: In this paper, the theory of paramagnetic resonance absorption by conduction electrons in a metal is worked out, taking into account the diffusion of the electrons in and out of the thin skin into which the radio-frequency field penetrates.
Journal ArticleDOI
Synthesis of highly conducting films of derivatives of polyacetylene, (CH)x
C. K. Chiang,M. A. Druy,S. C. Gau,A. J. Heeger,E. J. Louis,Alan G. MacDiarmid,Yung Woo Park,H. Shirakawa +7 more
Journal ArticleDOI
Electron Spin Resonance Absorption in Metals. I. Experimental
George Feher,A. F. Kip +1 more
TL;DR: In this paper, the electron spin resonance absorption in metals was investigated at 300 and 9000 Mc/sec, in the temperature range from 4\ifmmode^\circ\else\textdegree\fi{}K to 296\ifmode^''circ\circ''else''textdegree''fi{ }K, with too poor a signal-to-noise ratio to make accurate measurements.