Voltammetric characterization of soluble polyacetylene derivatives obtained from the ring-opening metathesis polymerization (ROMP) of substituted cyclooctatetraenes

Effect of Electrical Conductivity Through the Bulk Doping of the Product of Titanocene Dichloride and 2-Nitro-1,4-phenylenediamine

“…We have just begun investigating the results of polymer doping. While there are a number of different doping procedures employed in the production of conducting polymers, the most widely employed is the exposure of the polymeric material, often in a compacted disk, to elemental iodine vapors either as a vapor or as part of a mixture as we have done in the present study [ 1 , 7 , 8 , 9 , 10 , 11 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. We studied the effects of doping of over 50 products.…”

“…Figure 3 contains the conductivity for four amounts of iodine added, from 3% to 15%. Unlike doping silicon to produce semiconductors where the amount of doping agent is generally less than 1%, the amounts of iodine employed to move polyacetylene from a semiconductor to a conductor are in the range of 3 to 15% [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 35 , 40 ]. Thus, it was this range that was studied.…”

“…The conductivity measurements were done for the following frequencies: 0.4 KHz, 1KHz, 2KHz, 5KHz and 10KHz. Measurements and calculations were made in the usual manner [ 1 , 7 ,8,9,10, 11 ]. A blanket of nitrogen was present during the doping and measurement procedures to maintain an oxygen and moisture free surrounding.…”

“…The importance of this effort was recognized by the awarding of the Nobel Prize in 2000 to MacDiarmid, Heeger, and Shirakawa for their work with polyacetylene [ 1 , 2 , 3 , 4 , 5 , 6 ]. Conductivity is dependent on the micro- or fine structure of the fibrils, doping agent, extent, technique, and aging of the sample as well as other factors so it is complex [ 7 , 8 , 9 , 10 , 11 , 12 , 13 ].…”

Ring‐Opening Metathesis Polymerization (ROMP) and Related Processes

“…More recent developments have witnessed microphase-separated block copolymers incorporating polyacetylene as the central block (Saunders etal., 1991), as well as polyacetylene attached to microeletrodes (Oferet al, 1991). Grubbs and co-workers have shown that polyacetylene can be accessed via the ROMP of cyclooctatetraene (COT) (Klavetter and and substituted cyclooctatetraene (Ginsburg et al, 1989;Sailor et al, 1990;Gorman et al, 1993;Jozefiak et al, 1993), using Schrock's tungsten hexafluoro-^-butoxide initiator, in which the monomer is polymerized in the neat state to give a free-standing film (Fig. 3-30).…”