Polypara-phenylene

M. Dubois, A. Naji,J.P. Buisson, B. Humbert, E. Grivei, and D. Billaud, Characterisation of carbonaceous materials derived from polypara-phenylene pyrolyzed at low temperature, Carbon, 38(9) 1411-1417, 2000. 

The pristine conjugated polymers have been reported to contain electronic spins, presumably originating from inter-chain cross-linking in polyacetylene [25,26], formation of polynuclear structures in polypara-phenylene [27] and so on. The inter- and intra-chain reactions between these reactive sites can alter the chemical structure of conductive polymers even when they are pure, affecting their dopability and hence the electroactivity. 

J. L. Bredas, R. R. Chance, R. Silbey, Comparative theoretical study of the doping of conjugated polymers - polarons in polyacetylene and polypara-phenylene, Physical Review B 1982, 26, 5843. 

One major advantage of ion implantation is the control over the doping level, which, with the help of the fluence, we determine exactly [5]. The usual range is from lO to 10 ions/cm , which implies for polypara-phenylene KC6H4), density p =. 2 g/cm ] a doping level of 1-10% with regard to number of monomers or 0.1-1% with regard to total number of atoms. 

---