Copper phthalocyanine, charge-carrier

The phthalocyanines are still of some interest, and Ayers has interpreted the photoelectrochemistry of copper phthalocyanine in terms of the band-model for semiconductors. Menzel et alf have studied the photoconductivity and electrical field-induced fluorescence quenching in metal-free phthalocyanine films. Doping of the film increases charge-carrier photogeneration, and it seems likely that the mechanism is extrinsic, involving field-assisted exciplex dissociation. These are complicated materials, which are difficult to purify, and the mechanisms of carrier generation in polycrystalline and amorphous films are still obscure. The porphyrins and monolayer assemblies of chlorophyll on SnOj electrodes 2 72,273 ijggjj studied. 

A more positive result was obtained with one another quasi 1-D conductor, a copper phthalocyanine iodide [82], where it has been shown that the interactions between Cu " local moments arise from indirect exchange, involving the n charge carriers below 2K a spin glass state is apparently present. 

A semiconduction mechanism has, on occasion been considered as a possibility for electron transfer through thecytochromesystem. It is interesting that the charge-carrier mobility in copper phthalocyanine 0II), an often used... 

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