Langmuir and Langmuir-Blodgett films of a quinoline-fluorene based copolymer

Langmuir and Langmuir-Blodgett films of a quinoline-fluorene based copolymer

Author Correia, Fabio Conte Google Scholar
Wang, Shu H. Google Scholar
Peres, Laura O. Autor UNIFESP Google Scholar
Caseli, Luciano Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Abstract The fabrication of Langmuir-Blodgett (LB) films of synthetic polymers allows the control of molecular architecture in order to optimize physical properties. in this paper, the surface chemistry of a quinoline-fluorene based copolymer spread on the air-water interface is investigated. Surface pressure-area isotherms as well as Polarization-Modulation Infrared Reflection-Absorption Spectroscopy (PM-IRRAS) were employed to characterize the films, which could be transferred to solid supports by the LB technique. Atomic force microscopy as well as UV-Vis and fluorescence spectroscopies have shown a regular deposition of the polymers, and the luminescence properties could be controlled with the number of layers deposited on the solid support. As a result, the photoluminescence of the LB films was considerably higher than that observed for the spin coated film, and the maximum emission peak was shifted to higher energies, which is attributed to the molecular-level interactions within the layer-ordered structure of the LB film. the luminescence response would possibly be tuned to approach the highest level, which allows the films to be employed in future applications in efficient optical devices such as organic light-emitting diodes (OLEDs). (C) 2011 Elsevier B.V. All rights reserved.
Keywords Quinoline-fluorene based copolymer
Langmuir-Blodgett films
OLEDs
Monolayers
Language English
Date 2012-01-20
Published in Colloids and Surfaces A-physicochemical and Engineering Aspects. Amsterdam: Elsevier B.V., v. 394, p. 67-73, 2012.
ISSN 0927-7757 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 67-73
Origin http://dx.doi.org/10.1016/j.colsurfa.2011.11.027
Access rights Closed access
Type Article
Web of Science ID WOS:000300867800009
URI http://repositorio.unifesp.br/handle/11600/34534

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