Reversible reduction and reoxidation of Langmuir-Blodgett films of octacyanophthalocyanine dilithium complex

Langmuir-Blodgett film of octacyanophthalocyanine dilithium complex with st rong electron-withdrawing substituents was first prepared and its redox beh avior was studied by cyclic voltammetry. The LB film exhibited excellent re dox reversibility in an acid electrolyte. In contrast to the case of a solu tion-casting film, two couples of redox peaks were clearly discerned on the voltammetric curve. Also, the linear dependence of cathodic current on sca n rate was kept up to 4000 mV s(-1), which was 10 times larger than that of the solution-casting film.