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Unwanted bleaching of two-photon absorption microscopy probes can be reduced by designing more efficient nonlinear fluorophores. Here the linear and nonlinear photophysical properties of unsaturated oxazolones are studied. A set of push–pull oxazolone derivatives have been designed by substituting the 2-phenyl-4-benzylidene-1,3-oxazol-5-one unit in two different positions with a combination of electron...
New fluorescent oxazolone derivatives with high two-photon absorption cross-section were synthesized. Electron donor (phenyl, dimethylaniline and furanyl) and acceptor (nitrobenzene and ethenyl-phenyl-benzimidazol) groups have been appended to the methylene end of 4-(methylidene)-2-phenyl-1,3-oxazol-5(4H)-one in order to produce an highly conjugated π-system with push–pull geometry. The linear and...
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