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    Langmuir Films of an Oligo(p-phenylene vinylene) Functionalized with a Diaminotriazine Headgroup

    Year: 2001

    Journal: Langmuir 2001, 17, 3281-3285, 20111221

    Authors: D. T. Balogh, A. Dhanabalan, P. Dynarowiczatka, A. P. H. J. Schenning,, O. N. Oliveira, Jr., E. W. Meijer,and R. A. J. Janssen

    Organizations: Instituto de Fisica de Sao Carlos, Universidade de Sao Paulo, C.P. 369, 13560-970, Sao Carlos, SP, Brazil, Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, and Faculty of Chemistry, Jagiellonian University, 30-060 Krakow, Poland

    A detailed investigation is presented on the Langmuir film characteristics of a novel substituted oligo-(p-phenylene vinylene) with a diaminotriazine headgroup, namely, 6-[4-4-(3,4,5-tridodecyloxystyryl)-2,5-bis[(S)-2-methylbutoxy]styryl-2,5-bis[(S)-2-methylbutoxy]styryl]phenyl-2,4-diamino-1,3,5-triazine (OPVT).The films were characterized by recording surface pressure (π-A) and surface potential (ΔV-A) isotherms,in addition to Brewster angle microscopy (BAM). The limiting mean molecular area indicates formationof a monomolecular Langmuir film of OPVT at the air-water interface. The dependence of a plateau transition in the π-A isotherm on experimental conditions is studied. The critical area for the increasein surface potential revealed the interaction of OPVT molecules even at a large area per molecule, supportedby BAM images. On the basis of the data, we propose a model for the organization of OPVT molecules atdifferent stages of film compression.