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Poly furans

Fig. 1 Building units of conducting polymers, (1) polyacetylene (PA) (2) polypyrrole (PPy), polythiophene (PTh), polyfurane (PFu) (3) polyphenylene (PP) (4) polyaniline (PANI) 5 polyindole (PIND) (6) polycarbazole (PCaz) (7) polyazulene (Paz) (8) polynaphthalene (PNa) (9) polyanthracene (PAnth) (10) polypyrene (PPyr) (11) polyfluorene (PFiu) (12) poly(isothionaphthalene) (PITN) (13) poly(dithienothiophene) (14) poly(thienopyrrole) (15) poly(dithienylbenzene) (1G) poly(3-alkylthiophene) (17) poly(phenylene vinylene) (18) poly(bipyrrole) (PBPy), poly(bithiophene) (PBT) (19) poly(phenylenesulfide) (20) 4-poly(thienothiophene) (21) poly(thienyl vinylene), poly(furane vinylene) (22) poly(ethylenedioxythiophene) (PEDOT). Fig. 1 Building units of conducting polymers, (1) polyacetylene (PA) (2) polypyrrole (PPy), polythiophene (PTh), polyfurane (PFu) (3) polyphenylene (PP) (4) polyaniline (PANI) 5 polyindole (PIND) (6) polycarbazole (PCaz) (7) polyazulene (Paz) (8) polynaphthalene (PNa) (9) polyanthracene (PAnth) (10) polypyrene (PPyr) (11) polyfluorene (PFiu) (12) poly(isothionaphthalene) (PITN) (13) poly(dithienothiophene) (14) poly(thienopyrrole) (15) poly(dithienylbenzene) (1G) poly(3-alkylthiophene) (17) poly(phenylene vinylene) (18) poly(bipyrrole) (PBPy), poly(bithiophene) (PBT) (19) poly(phenylenesulfide) (20) 4-poly(thienothiophene) (21) poly(thienyl vinylene), poly(furane vinylene) (22) poly(ethylenedioxythiophene) (PEDOT).
Cationic polymerization of furan (53) and alkylated furans is often complicated by the formation of crosslinked, insoluble materials (77MI11102). Early reports postulated 1,2-polyaddition as a primary reaction followed by crosslinking through the resultant dihydrofuran moieties. More recent results (80MI11106) shed considerable doubt on the 1,2-addition sequence, at least beyond the trimer stage. The ultimately formed poly(furans) are believed to be composed mainly of units with structural features similar to those of tetramers (54 Scheme 14). [Pg.278]

Figure 1. Examples of conducting polymers and species responsible for charge storage. Top, poly(acetylene) and soliton 2nd, poly-p-phenylene and bipolaron 3rd, poly- -phenylene sulfide 4th, poly(heterocycles) and bipolaron. Bipolarons in poly(furan) have not yet been established. Figure 1. Examples of conducting polymers and species responsible for charge storage. Top, poly(acetylene) and soliton 2nd, poly-p-phenylene and bipolaron 3rd, poly- -phenylene sulfide 4th, poly(heterocycles) and bipolaron. Bipolarons in poly(furan) have not yet been established.
Poly([7,8-bis(trifluoromethyl)tetracyclo [4.2.0.02 8.05 7]octane-3,4-diyl]-1,2-ethenediyl), 3457 Poly[borane(l)], 0134 crs-Poly (butadiene), 1480 Poly(l,3-butadiene peroxide), 1528 Poly(butadiyne), 1382 Poly(carbon monofluoride), 0336 Poly(chlorotrifluoroethylene), 0589 Poly(l,3-cyclohexadiene peroxide), 2380 Poly(cyclopentadienyltitanium dichloride), 1837 Poly(diazidophosphazene), 4781 Poly(dibromosilylene), 0282 Poly(difluorosilylene), 4324 Poly(dihydroxydioxodisilane), 4474 Poly(dimercuryimmonium acetylide), 0665 Poly(dimercuryimmonium azide), 4606 Poly(dimercuryimmonium bromate), 0253 Poly (dimercury immonium iodide hydrate), 4449 Poly (dimercury immonium perchlorate), 4006 Poly(dimercuryimmonium permanganate), 4603 Poly (dime thylketene peroxide), see Poly(peroxyisobutyrolactone), 1531 Poly(dimethylsiloxane), 0918 Poly(disilicon nitride), 4752 Poly(ethenyl nitrate), see Poly(vinyl nitrate), 0760 Poly(ethylene), 0778 Poly(ethylene terephthalate), 3256 Poly(ethylidene peroxide), 0831 Poly(furan-2,5-diyl), 1398 Poly(germanium dihydride), 4409 Poly(germanium monohydride), 4407 Poly(isobutene), 1578 Poly(methyl methacrylate peroxide), 1913... [Pg.2126]

Electron-conductive polymers, poly(pyrroles), poly(thiophenes), poly-(furan), poly(quinoline), and poly(benzo[c]thiophene) 90MI22 91MI56. [Pg.303]

A variety of other poly-furans have been employed in Wittig reactions as either the aldehyde or the ylide component. Condensation of 5,5 -thiodi-2-furaldehyde (176), for instance, with the 2,2 -bifuryl-5,5 -diylbis-(methylenetriphenyl-phospho-nium bromide) (177) under basic conditions, gave the macrocycle 178 as orange crystals in 1.3% yield (Scheme 29) [148]. Two macrocyclic annulenones 182 and 184 were also obtained [149] from the base induced condensation of 181 with the dialdehydes 180 or 183, respectively. Both products are obtained in moderate yields (12-15%) and are highly colored solids (Schemes 30 and 31, respectively). [Pg.224]

Conjugated polymers (particularly, polythiophene, polypyrrole, and poly-furan) and aromaticity 05CRV3448. [Pg.5]

Poly(ethyl succinate), 264 Poly(ethyl-o-vinyl acetal-alt-MA), 328 Poly(A -ethyl-2-vinylcarbazole-alt-MA), 376, 378 Poly(ethyI vinyl ether-alt-MA), 376, 437, 621 Poly(ethyl-o-vinyl formal-alt-MA), 328 Poly(ethyl vinyl sulfide-alt-MA), 386, 414 Poly(furan-alt-MA), 320, 322, 386 Poly(2-furyl-5,5-dimethyl-l,3-dioxane-alt-MA),... [Pg.859]

Pelter and coworkers [115] chemically prepared structural isomers of poly(furan-c6>-phenylene)s by reacting bis-zinc chlorides of l,4-bis(2-furanyl)phenylenes with 1,3- and 1,4-dibromobenzene. In another study [116],... [Pg.271]

Gonzdlez-Tejera et al. [681] recently reported electropolymerization of poly(furan)-/perchlorate from monomer solutions in aprotic media in which dopant concentrations were lower than monomer concentrations. The CP films were claimed to be conductive. Belloncle et al. [682] claimed production of conductive, electroactive CP films from electropolymerization, in tetrafluoroborate/methylene chloride, of several crown ethers such as bis-binaphtho-22-crown-6 and binaphtho-20-crown-6. [Pg.428]

See other pages where Poly furans is mentioned: [Pg.341]    [Pg.2128]    [Pg.16]    [Pg.547]    [Pg.478]    [Pg.16]    [Pg.478]    [Pg.2045]    [Pg.342]    [Pg.89]    [Pg.322]    [Pg.271]    [Pg.272]    [Pg.272]    [Pg.1068]    [Pg.1121]   
See also in sourсe #XX -- [ Pg.1581 ]



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