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Opto-Electronic Properties of Fluorene-Based Derivatives as Precursors for Ligh...
Fratiloiu, Silvia; Fonseca, Sofia M.; Grozema, Ferdinand C.; Burrows, Hugh D.; Costa, Maria L.; Charas, Ana; Morgado, Jorge; Siebbeles, Laurens D. A.This paper reports optical absorption spectra of oxidized fluorene copolymers obtained by chemical oxidation with Ce(IV) and by pulse radiolysis experiments in chlorinated solvents. Comparison of the results observed by the two techniques is used to provide spectral data on the copolymer radical ions and information on stability of the oxidized species. In addition, a detailed quantum chemical characterization ...
Kinetics and Thermodynamics of Poly(9,9-dioctylfluorene) β-Phase Formation in D...
Dias, Fernando B.; Morgado, Jorge; Maçanita, António L.; Costa, Fernando P. da; Burrows, Hugh D.; Monkman, Andrew P.Poly(9,9-dioctylfluorene) (PFO) adopts a particular type of conformation in dilute solutions of the poor solvent methylcyclohexane (MCH) below 273 K, which is revealed by the appearance of a red-shifted absorption peak at 437−438 nm. The formation of this ordered conformation depends on the temperature but is independent of polymer concentration over the range studied (3−25 μg/mL). On the basis of absorption, s...
Kinetics and thermodynamics of poly (9,9-dioctylfluorene) beta-phase formation ...
Costa, Fernando Pestana da; Maçanita, António L.; Morgado, Jorge; Dias, Fernando B.; Burrows, Hugh D.; Monkman, Andrew P.Poly(9,9-dioctylfluorene) (PFO) adopts a particular type of conformation in dilute solutions of the poor solvent methylcyclohexane (MCH) below 273 K, which is revealed by the appearance of a red-shifted absorption peak at 437−438 nm. The formation of this ordered conformation depends on the temperature but is independent of polymer concentration over the range studied (3−25 μg/mL). On the basis of absorption, s...
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