Author(s):

Williams-Harry M (Williams-Harry, Michele), Bhaskar A (Bhaskar, Ajit), Rarnakrishna G (Rarnakrishna, Guda), Goodson T (Goodson, Theodore, III), Imamura M (Imamura, Mika), Mawatari A (Mawatari, Akane), Nakao K (Nakao, Kazurni), Enozawa H (Enozawa, Hideo), Nishinaga T (Nishinaga, Tohru), Iyoda M (Iyoda, Masahiko)

Abstract:

Giant pi-conjugated macrocycles composed of thiophene, acetylene, and ethylene subunits arranged as 72 pi, 108 pi, 144 pi, and 180 pi electron systems were synthesized and analyzed for their one- and two-photon absorbance properties. Increasing pi-conjugation showed an increase in the two-photon absorption cross section with magnitudes as high as 100 000 GM in the visible spectral region.