polyacetylenen.
/ˌpɒlɪəˈsɛtᵻliːn/, /ˌpɒlɪəˈsɛtl̩iːn/, U.S. /ˌpɑliəˈsɛdl̩ən/, /ˌpɑliəˈsɛdəˌlin/ Chemistry.
1. A polyyne; spec. any of a class of compounds containing a polyyne chain which occur naturally in plants (esp. of the family Asteraceae ( Compositae)) as repellents to parasites and herbivores.
ΘΚΠ
the world > matter > chemistry > polymer chemistry > polymers (named others) > [noun] > others miscellaneous
polysulphide1849
indoline1884
polyacetylene1885
polymethylene1892
polysaccharide1892
polysaccharose1894
polyose1895
polymethacrylic acid1897
hydrol1900
polyphosphate1908
polyphenylene1921
polyacrylate1932
polyacrylonitrile1935
polyisocyanate1943
polyacrylamide1944
polysiloxane1944
polyglycolic acid1956
polynosic1959
anomalous water1966
polywater1969
1885 Jrnl. Chem. Soc. 48 759 (heading) Polyacetylene compounds.
1952 Jrnl. Amer. Chem. Soc. 74 1588/2 From these spectra, Dr. Sörensen identified our compounds as polyacetylenes.
1967 New Scientist 13 Apr. 95/2 In recent years the widespread occurrence in fungi and plants..of straight-chain ‘polyacetylenes’..has been recognized.
1997 Independent 18 Feb. ii. 8/4 It contains complex sugars called polysaccharides, and chemicals called polyacetylenes, both of which stimulate the production of interleukin and interferons.
2. A black solid polymer with the structure (—CH=CH—)n, which is a good conductor, esp. when doped with metals.
ΚΠ
1974 Philos. Trans. (Royal Soc.) A. 277 266 In other instances (e.g. the formation of the polyacetylenes) no phase-separation takes place.
1978 Sci. Amer. Dec. 66/1 It is conceivable that a polyacetylene film could replace ordinary metal conductors in some special circumstances.
1995 Computing 1 June 23/5 Back in 1988, the German tape manufacturer BASF successfully produced highly conducting polyacetylene.
Derivatives
ˌpolyacetyˈlenic adj.
ΘΚΠ
the world > matter > chemistry > polymer chemistry > polymers (named others) > [adjective]
polyoxyethylene1939
polyacetylenic1952
polynosic1959
1952 Jrnl. Amer. Chem. Soc. 74 1588/2 The isolation of polyacetylenic compounds from several genera of Compositae.
1996 Nature 12 Sept. 125/1 60-carbon polyacetylenic spherical cyclophanes..the molecular polyacetylenic carbon belt..or the spheriphane..are all promising candidates [for the generation of C60].
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1885