In this work, we have synthesized a series of 2,6-bis[4-(p-dihexylaminostyryl)styryl]anthracene derivatives 1−5 with a variety of donor−acceptor substituents (Figure 1) and measured the δ TPA values by using the femtosecond (fs) fluorescence method. We were interested in learning whether the presence of additional donors and extended conjugation would significantly enhance the two-photon cross section. Dihexylamino group has been employed as the terminal ...
