Controlling photo-oxidation processes of a polyfluorene derivative : the effect of additives and mechanism.
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2014
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The control of the photo degradation of a fluoreneevinyleneephenylene based-polymer, poly(9,9-dihexylfluorenediylvinylene-alt-1,4-phenylenevinylene) (LaPPS16) was achieved by addition of a radical scavenger (RS) (enhancing photo resistance) or a radical initiator (RI) (reducing photo resistance). Photoluminescence, UVeVis absorption, 1 H NMR spectroscopies and gel permeation chromatography (GPC) revealed that the incorporating small amounts of RS or RI is an efficient way to control the rates of the photo-oxidation reactions, and thus to obtain the conjugated polymer with foreseeable degradation rates for applications in blue-light sensitive detectors for neonatal phototherapy.
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Optical properties, Oxidation, Radiation damage, Electronic materials
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FERREIRA, G. R. et al. Controlling photo-oxidation processes of a polyfluorene derivative: the effect of additives and mechanism. Materials Chemistry and Physics, v. 146, p. 212-217, 2014. Disponível em: <http://www.sciencedirect.com/science/article/pii/S025405841400128X>. Acesso em: 23 fev. 2015.