Journal ArticleDOI
Conducting Polymers: Halogen Doped Polyacetylene.
TLDR
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.Abstract:
A study of the electrical conductivity of the halogen doped transpolyacetylene system, (CH)x, is reported. When films of trans‐ (CH)x are exposed to chlorine, bromine, or iodine vapor, uptake of halogen occurs; and the conductivity increases markedly, over eleven orders of magnitude in the case of iodine. The behavior of the halogenated polyacetylene is like that of a series of semiconductors with activation energies which vary with halogen content. The results are discussed in terms of a model of the doping process based on charge transfer.read more
Citations
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Semiconductor-metal transition in doped (CH)x: Thermoelectric power
TL;DR: In this article, the power of polyacetylene polymethylacetylene has been investigated as a function of dopant concentration and temperature, and the results show that the power remains positive over the full range of concentration 0 < y < 0.03, while the semiconductor-metal transition occurs at nc ≅ 3 mole %.
Journal ArticleDOI
Direct thiophene arylation catalysed by Palladium
TL;DR: In this article, the Heck-type reaction with Pd(OAc) 2 NBu 4 Br as catalytic system was reported, where the substitution is regiospecific when the heterocycle is 2-substituted with an electron withdrawing group.
Journal ArticleDOI
Soft, wet, and reactive polymers. Sensing artificial muscles and conformational energy
TL;DR: In this paper, a new unexplored world for basic academic research and for the development of new biomimicking devices is emerging Combination of chemical reactions and conformational energy of the chains open a new paradigm: there are great expectations for the developing of electrochemical actuators (artificial muscles, smart windows, smart membranes, smart drug delivery) intelligent devices able to sense their surroundings during work.
Journal ArticleDOI
Phototransport effects in polyacetylene, (CH)x
TL;DR: In this paper, the photovoltaic and photoconductivity effects in polyacetylene were investigated and the spectral range was extended to include the visible region as well as the visible spectrum.
Journal ArticleDOI
Semiconductor properties of polyacetylene p‐(CH)x : n‐CdS heterojunctions
TL;DR: In this paper, a residual acceptor concentration in as-grown polyacetylene films of p(CH)x of NA?2×1018 cm−3 was derived.
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
Hopping Conductivity in Disordered Systems
TL;DR: In this paper, the authors considered a model in which charge is transported via phonon-induced tunneling of electrons between localized states which are randomly distributed in energy and position, and obtained an electrical conductivity of the form
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
Thermal cis–trans isomerization and decomposition of polyacetylene
TL;DR: In this paper, thermal analysis and infrared spectroscopy of polyacetylene was used to investigate cis-trans isomerization, hydrogen migration accompanied with crosslinking reaction, and thermal decomposition.