Fabrication and characterization of composite Langmuir-Schaefer films of poly(ortho-anisidine) conducting polymer and tri-(2,4-di-t-amylphenoxy)-(8-quinolinolyl) copper phthalocyanine

Langmuir-Schaefer (LS) films of composite poly(ortho-anisidine) (POAS) and tri-(2,4-di-t-amylphenoxy)-(8-quinolinolyl) copper phthalocyanine (CuPc) we re fabricated, and characterized by UV-VIS absorption spectroscopy, quartz crystal microbalance (QCM), electrochemical, in situ spectro-electrochemica l techniques, respectively. Surface pressure-area isotherm of composite sys tem showed stable Langmuir films at air-water interface. The uniform deposi tion of composite monolayers were verified by optical absorption, QCM and c yclic voltammetric measurements. The effects of doping on composite LS film s were discussed. Cyclic voltammograms of POAS, CuPc and POAS/CuPc composit e systems were also compared. The redox switching response time and diffusi on coefficient of such composite LS films were estimated by electrochemical surveying. The photoelectrochemical current transient response of composit e LS films was measured at length. (C) 2001 Elsevier Science B.V. All right s reserved.