The synthesis of a novel pi-conjugated trinaphthylamines series is described. These original push-pull octupolar systems exhibit large two-photon action cross section (sigma phi up to 510 GM) increased by a factor of 2-3 as compared to their triphenylamines analogues. This substantial improvement of the two-photon absorption properties is attributed to the stronger donor character of the trinaphthyl core.
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Bordeau et al. (2008) studied this question.
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