Journal ArticleDOI
Spectroscopic studies on doped polyacetylene and β-carotene
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In this article, the structural details of doped polyacetylene (a highly conducting organic polymer) were studied using optical absorption, Raman, and infrared spectra of polyacetylenes.Abstract:
In order to elucidate the structural details of doped polyacetylene (a highly conducting organic polymer), the optical absorption, Raman, and infrared spectra of not only trans‐(CH)x doped with iodine, AsF5, and SO3 but also β‐carotene doped with iodine and SO3 were studied. The infrared spectra of two kinds of isotopically substituted polyacetylenes (CD)x and (13CH)x doped with iodine were also observed. Analysis of the experimental results shows that upon doping each of the four vibrational branches (ν1–ν4) in the 1600–900 cm−1 region of a polyene chain splits into two groups, namely, the higher frequency group and the lower frequency one. The former group consists of the ’’gerade’’ vibrations of polyene parts which are not directly attacked by dopants but are perturbed along the chain, whereas the latter is made up of the ’’ungerade’’ vibrations of the positively charged polyene part with the doped site at its center. The Raman bands in the higher‐frequency group of ν1 (mainly the C=C stretching mode) ...read more
Citations
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Journal ArticleDOI
Raman spectroscopy of amorphous, nanostructured, diamond-like carbon, and nanodiamond
Andrea C. Ferrari,John Robertson +1 more
TL;DR: It is shown how to use resonant Raman spectroscopy to determine structure and composition of carbon films with and without nitrogen, and the assignment of the peaks at 1150 and 1480 cm−1 often observed in nanodiamond.
Journal ArticleDOI
The Discovery of Polyacetylene Film: The Dawning of an Era of Conducting Polymers (Nobel Lecture)
TL;DR: This lecture is not directly related to the discovery and development of conducting polymers to which the Nobel Prize in Chemistry 2000 was awarded, but the previous work that was carried out just before the discovery of chemical doping is presented.
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.
Book ChapterDOI
Conducting polymer nanomaterials and their applications
TL;DR: In this paper, the synthetic methodology of conducting polymer has been briefly considered with chemical oxidation polymerization and electrochemical polymerization with respect to soft template method, hard template method and template-free method.
Journal ArticleDOI
The mystery of the 1140 cm−1 Raman line in nanocrystalline diamond films
TL;DR: In this article, it was shown that trans-polyacetylene originates from the diamond film and the diamond mode around 1332 cm−1 does not, while the deuterium and H-D substituted hydrocarbon sources do.
References
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Journal ArticleDOI
Solitons in polyacetylene
TL;DR: In this paper, the authors present a theoretical study of soliton formation in long-chain polyenes, including the energy of formation, length, mass, and activation energy for motion.
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
Infrared Spectra of Poly(acetylene)
Hideki Shirakawa,Sakuji Ikeda +1 more
TL;DR: In this paper, the infrared spectra of poly(acetylene), poly(d2), copoly(acety+acetylene-d2) and copoly (acetylene+acetane-d1+acetene-d 2) are reported over a wide temperature range (ca. −100 to 180°C) and a tentative assignment of the observed spectra is made on the basis of model structures in which infinite planar chains of all trans, all trans-cisoid, and all cis-transoid configurations are assumed.
Journal ArticleDOI
Conducting Polymers: Halogen Doped Polyacetylene.
TL;DR: In this article, the electrical conductivity of the halogen doped transpolyacetylene system, (CH)x, was studied in terms of a model of the doping process based on charge transfer.
Journal ArticleDOI
Organic Metals and Semiconductors: The Chemistry of Polyacetylene, (CH)x, and Its Derivatives.
TL;DR: Both cis and trans-forms of polyacetylene, (CH)x, may be prepared as silvery, flexible, polycrystalline, semiconducting films as mentioned in this paper, and the cis-films can be stretched to over three times their original length with partial alignment of the fibrils.