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Topic: Poly(acetylene)s

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	Conductive polymer - Wikipedia, the free encyclopedia
		In polyacetylene, but not in most other conductive polymers, this creates degeneracy in the frontier molecular orbitals (the highest occupied and lowest unoccupied orbitals named HOMO and LUMO respectively).
		Melanin is the classic example of both types of doping, being both an oxidized polyacetylene and likewise commonly being hydrated.
		The melanin pigment in animals is generally a mixed copolymer of polyacetylene, polypyrrole, and polyaniline.
	en.wikipedia.org /wiki/Conductive_polymers (1441 words)

	Document Title
		Polyacetylene exists as both the cis and the trans form.
		Polyacetylene can be doped with electron donors and electron acceptors to form both n-type and p-type semiconductors.
		Polyacetylene is often referred to in the literature as an
	www.bgsu.edu /departments/chem/faculty/endres/polyac/polyacetylene.htm (3528 words)

	IOM e.V. Leipzig - Schwerpunkte
		Poly(acetylene) as the simplest representative of this class of compounds suffers from insolubility, lack of processability, and insufficient stability versus oxygen.
		However, despite their outstanding and promising role in the development of conjugated materials, poly(ene)s based on poly(acetylene)s were never able to fulfill the high expectations.
		A major reason for the failure of poly(ene)s in form of poly(acetylene)s in the above-mentioned applications is related to their inherent instability versus moisture and oxygen and their high proneness towards decomposition/rearrangement in the partially oxidized/doped state.
	www.iom-leipzig.de /html/eng/Schwerpunkte/cyclopolymerisation.cfm (399 words)

	NSF REU Program in Chemical Physics, University of Oregon, Summer Projects for 1998 (Site not responding. Last check: 2007-10-13)
		By adding an electrolyte and a third electrical contact, it is possible to alter the electrochemical properties of poly(acetylene) while observing the properties of the underlying Si/poly(acetylene) interface.
		Such a structure should yield a variable diode, and permit for the detailed study of precisely how the properties of inorganic semiconductor/conducting polymer interfaces depend on the electrochemical characteristics of conjugated organic polymer.
		Work on this project will entail the use of synthesis of derivatized poly(acetylene)s using transition metal organometallic catalysts, the fabrication of semiconductor device structures, and the electrical characterization of these structures using electrochemical and capacitance techniques.
	darkwing.uoregon.edu /~cpi/proj98.html (1752 words)

	Re: How is carbon used in making plastics
		You can polymerize it to polyacetylene which can be called a plastic.
		Polyacetylene when doped (mixed) with iodine is used as a polymeric semiconductor.
		As you can see it a complicated and expensive process to convert carbon to a plastic.
	www.madsci.org /posts/archives/mar2000/954536266.Ch.r.html (564 words)

	SPIE Proceedings Vol. 3145
		Strong blue and green photoluminescence and electroluminescence have been observed in the poly(diphenylacetylene) derivatives and poly(1-alkyl-2-phenylacetylene) derivatives, contrary to trans-polyacetylene, in which only very weak photoluminescence are observed at infrared region.
		The dependence of optical properties of the di-substituted polyacetylene derivatives such as photoluminescence intensity and electroluminescence efficiency on the molecular structure of substituents and the change of optical properties upon electrochemical doping and their interpretation by soliton model have also bee discussed.
		Abstract: Both theoretical and experimental studies in the past have indicated that the charge transport in lightly doped polyacetylene is due primarily to traveling charged solitonic waves along the polymer chain backbone accompanied by hopping from one chain to another.
	www.spie.org /web/abstracts/3100/3145.html (7394 words)

	Jim's Curriculum Vita
		Resonance Raman Spectroscopic Evidence for Selective Population of Ligand-Localized 3 MLCT Excited States," J. Am.
		F. Holler, L. Tolbert and J. Schomaker, "A Carbanion Approach to 'Doped' Polyacetylene: Poly (Acetylene-Co-1,3-Butadiene)," Synthetic Metals, 15, 195-199 (1986).
		P. Eklund, C. Olk and F. Holler, "Raman Scattering Study of the Staging Kinetics in the C-Face Skin of Pyrolytic Graphite - H 2 SO 4," J. Mater.
	www.uky.edu /~holler/html/vita.htm (1084 words)

	Butatriene-Based Polymer Chemistry. 3.1 New Route to Substituted Poly(acetylene)s through the Base-Catalyzed ... (Site not responding. Last check: 2007-10-13)
		3.1 New Route to Substituted Poly(acetylene)s through the Base-Catalyzed Rearrangement of Poly(2-butyne-1,4-diyl)s
		New Route to Substituted Poly(acetylene)s through the Base-Catalyzed Rearrangement of Poly(2-butyne-1,4-diyl)s
		Department of Chemistry and the Polymer Science and Engineering Program, Howard University, Washington, D.C. Received July 8, 1997
	pubs.acs.org /cgi-bin/jtext?mamobx/31/i06/abs/ma9709922 (61 words)

	Membrane Research at The University of Texas at Austin
		Wang, X.Y., R.D. Raharjo, H.J. Lee, Y. Lu, I.C. Sanchez, and B.D. Freeman, "Molecular Simulation and Experimental Study of Substituted Polyacetylenes: Fractional Free Volume, Cavity Size Distribution and Diffusion Coefficients," J.
		Yampolskii, Yu.P., A.P. Korikiv, V.P. Shantarovich, K. Nagai, B.D. Freeman, T. Masuda, M. Teraguchi, and G. Kwak, "Gas Permeability and Free Volume of Highly Branched Substituted Polyacetylenes," Macromolecules, 34(6), 1788-1796 (2001).
		Toy, L.G., B.D. Freeman, A. Morisato, I. Pinnau, T. Masuda, and M. Teraguchi, "Pure-Gas Permeation and Sorption Properties of High-Free-Volume, Vapor-Selective, Glassy Polyacetylenes," Proceedings of the American Chemical Society Division of Polymeric Materials: Science and Engineering, 77, 256-257 (1997).
	membrane.ces.utexas.edu /Default.asp?Category=Publications (4964 words)

	Molecular Electronics: titles per sub-domain
		(1996) Morphological Alignment of Liquid-Crystalline Conducting Polyacetylene Derivatives
		Synthesis of Peptides Catalyzed by Alpha-Chymotrypsin Immobilized on Graft- Copolymers
		(1995) Incorporation of a Polyacetylene Block in Soluble Block-Copolymers
	www.cwts.nl /ed/molelec/title7.html (14038 words)

	Molecular Electronics: titles per sub-domain
		(1996) Grafting of Polyacetylene Onto C-60 Using Charged Nucleophiles
		(1994) A Novel Catalyst System for the Production of Polyacetylene and of Blends of Polyacetylene with Some Silicon-Containing Polymers
		(1995) Unique Liquid-Crystalline Behavior of Conducting Polyacetylene Derivatives
	www.cwts.nl /ed/molelec/title2.html (14385 words)

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