Contact
    Start Publications Controlling the luminescence properties of poly(p-phenylene ...
    ←  Publication Finder
    KSV NIMA

    Controlling the luminescence properties of poly(p-phenylene vinylene) entrapped in Langmuir and Langmuir–Blodgett films of stearic acid

    Year: 2011

    Journal: Synthetic Metals, 2011, 161 (15-16), 1753-1759, 20131009

    Authors: Andrei Sakai, Shu H. Wang, Laura O. Péres, Luciano Caseli

    Organizations: Laboratório de Materiais Híbridos, Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, Diadema, SP, Brazil; Laboratório de Macromoléculas, Departamento de Engenharia Metalúrgica e de Materiais, Escola Politécnica, Universidade de São Paulo, São Paulo, SP, Brazil

    Properties of hybrid films can be enhanced if their molecular architecture is controlled. In this paper, poly (p-phenylene vinylene) was mixed with stearic acid in order to form stable hybrid Langmuir monolayers. Surface properties of these films were investigated with measurements of surface pressure, and also with polarization modulation infrared reflection–absorption spectroscopy (PM-IRRAS). The films were transferred from the air–water interface to solid supports through the Langmuir–Blodgett technique, and the viability of the film as optical device was investigated with fluorescence spectroscopy. Comparing the fluorescent spectra for the polymer in solution, as a casting film, and as an LB film, the emission bands for LB films were narrower and appeared at lower wavelengths. The interactions between the film components and the design for the LB film may take advantage of the method to immobilize luminescent polymers in mixed ultrathin films adsorbed in solid matrices.