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TWO-PHOTON ABSORPTION AND FLUORESCENCE WITH QUADRUPOLAR AND BRANCHED CHROMOPHORES. EFFECT OF STRUCTURE AND BRANCHING

Abstract : The photophysical and two-photon absorption (TPA) properties of three homologous quadrupolar and one related three-branched chromophores were investigated. Design of the quadrupoles is based on the symmetrical functionalization of a biphenyl core. Modulation of the nonlinear absorptivity/transparency/photostability trade-off can be achieved by playing with the twist angle of the core and on the spacers (phenylene- vinylene versus phenylene-ethynylene). The quadrupolar chromophores combine high TPA cross-sections, high fluorescence quantum yield and solvent sensitive photoluminescence properties. The branched structure exhibits spectrally broadened TPA in the NIR region (up to 3660 GM at 740 nm measured in the femtosecond regime) but reduced sensitivity to the environment.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01417623
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Submitted on : Thursday, December 15, 2016 - 5:20:48 PM
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Laurent Porrès, Olivier Mongin, Claudine Katan, Marina Charlot, Bharath Kumar Goud Bhatthula, et al.. TWO-PHOTON ABSORPTION AND FLUORESCENCE WITH QUADRUPOLAR AND BRANCHED CHROMOPHORES. EFFECT OF STRUCTURE AND BRANCHING. Journal of Nonlinear Optical Physics and Materials, World Scientific Publishing, 2004, 13 (03n04), pp.451-460. ⟨10.1142/S0218863504002109⟩. ⟨hal-01417623⟩

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