Conductivity and Energy Gap Measurements of Some Relatives of Phthalocyanine

Abstract

The electrical resistance of samples of powdered copper‐phythalocyanine, platinum phthalocyanine, highly chlorinated copper‐phthalocyanine, and of two polymers of copper‐phthalocyanine were measured at various temperatures in a nitrogen atmosphere.All of the compounds showed semiconductive behavior. The highly chlorinated copper‐phthalocyanine and the platinum‐phthalocyanine had approximately the same resistance as the copper‐phthalocyanine, whereas both polymers had lower resistances—one of the polymers having a resistance of about 10−3 that of copper‐phthalocyanine at various temperatures. Some theoretical implications of the above facts are mentioned in this report.

Electronic conduction and polarization in polyphthalocyanines

“…Combining eqs. (5) and (12), we obtain Eo = eLN/"2e1e0(er + 2)l and on using eqs. (8) and (9), it becomes…”

“…We shall adopt this view in the following picture of the charge distribution during polarization saturation. Referring to Figure 5, the external field force upon the freed electron of interest is given by eEloc cos fi = (e2/4R2e~eo)(L/2R) (5) when the electron has been pulled to its furthest point within the molecule. Here, and @ is the angle the polarizable molecule makes to the applied field.…”

Study on electrical conductivity of 2‐vinylpyridine‐methyl methacrylate copolymer in presence of cobalt acetate

“…Studies were made on the electrical conductivity of oligomers and polymers prepared from aromatic compounds containing nitrogen. Examples of these compounds are phthalocyanine1–3 (a chelated compound), poly‐ N ‐vinylcarbazole,4–9 polypyrrole,10 and poly(2‐vinylpyridine) (P2VP) 11. Chohan et al12, 13 studied the electrical behavior of some polymeric charge transfer complexes that were prepared by the complexation of P2VP with metal salts.…”

On the Electronic Molecular Structure of the Organic Semiconductor Copper Phthalocyanine

“…The CuPc molecules condense in different organic molecular crystals with the monoclinic p-modification as the stablest one [5]. In polymeric CuPc the electrical dark conductivity is larger than in monomeric molecular crystals [6].…”