Langmuir-blodgett films composed of hydrophilic and hydrophobic moiety substituted phthalocyanines

The monolayer assemblies of commercially available copper phthalocyanine (Pc) analogs, which are symmetrically substituted by the hydrophobic (cumylphenoxy or butoxy) moieties, can be constructed at the air/water interface by mixing with hydrophilic copper tetrakis (dimethylaminoethoxy) phthalocyanine (tdaCuPc). The mixed monolayers composed of commercially available copper Pc analog and tdaCuPc as a support are deposited by Langmuir-Blodgett (LB) method onto a glass plate and a quartz substrate bearing a gold-interdigitated electrode pattern. The conductivities of the LB films are increased by thermal excitation and by exposure to an acceptor gas such as nitrogen dioxide under a dry-air atmosphere.