Diphenylamino-substituted tristyryl vs. triphenyl isocyanurates: improved conjugation has minimal impact on two-photon absorption

Abstract

This contribution reports the synthesis of C₈₇H₆₀N₆O₃ (3-NPh₂), the tristyryl analogue of the triphenylisocyanurate C₈₁H₅₄N₆O₃ (2-NPh₂) which was previously demonstrated to be an active two-photon absorber. Contrary to expectation, planarization and extension of the central π-system does not lead to a marked improvement of the two-photon absorption cross-section.