Iodine electrical properties

The crystal structures of the Ru(Et2Dtc)3G (268) and Ru(Me2Dtc)3I3 (435) complexes have been determined. On both, the Ru(IV) coordination geometry is pentagonal bipyramidal (Fig. 39) (Table XX). The ruthenium atoms in the ethyl derivative are pendant on infinite chains of iodine atoms in the lattice. This observation and the unusual golden color of the complex suggest that the crystals of this compound may possess interesting electrical properties. 

Vannikov, A. V., and N. A. Bakh The effect of iodine on the electrical properties of products of radiation-thermal modification of polyethylene. Dokl. Akad. Nauk. 149, 357 (1963). 

As described in Section II.B.l above, doping causes a drastic change in the electrical properties of polyacetylene. The initial values of electrical conductivity were of the order of 10 S cm" for unoriented materials d24-i30 when doped by iodine and AsFs, were enhanced to the order of 10 S cm, which was obtained in the parallel direction of the doped films oriented by mechanical stretching 31 Improvements in polymerization methods and in the catalyst systems also enhanced the electrical conductivity. Highly oriented films prepared in liquid crystal solvents (Section II.A.l.d.iii) exhibited a conductivity higher than 10 S cm, as did also a well stretch-oriented film prepared by Ti(OBu)4-EtsAl dissolved in silicon oil and aged at 120°C. In further studies Naarmann and Theophilou and Tsukamoto and coworkers attained a conductivity of ca 10 S cm k... 

The intractability of the early preparations of polyacetylene has severely hampered the establishment of clear-cut relationships between structure, morphology and (electrical) properties. An early example of an integrated approach to structure-property relations is a paper by Haberkom et al. [24], From a combination of x-ray data with NMR and IR investigations, these authors have found a relationship between the content of sp defects and crystallinity in polyacetylene prepared by the Shirakawa, Luttinger and other methods. Such defects are apparently expelled to the amorphous phase. The authors find a correlation with conductivity in both undoped and iodine-doped samples. 

From the stability of the phenothiazine iodine and CPZ l2 complexes in their electrical properties and in view of the fact that the stable form for... 

Xu et al. [82] studied the effect of copolymer composition on the electrical properties of the polymer prepared by chemical polymerization initiated by FeCl3. They found that copolymer composition was consistent with the monomer ratio in the feed, and the molecular weight decreased with increasing concentration of 3-MT units. With increasing concentration of 3-MT units, the conductivity of iodine doped films increased from 13 S cm to 26 S cm with a maximum of 25 mole%. The interband transition energies for all copolymers were approximately 2.2 eV Figure 11.18 illustrates the structure of the repeating unit of the copolymer. 

Table 2. Electric properties of the iodine-complexes of some oligo(p-phenylene aminesT according to Hadek et al. (1969) " ...

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