Supramolecular Zinc Phthalocyanine−Perylene Bisimide Triad:  Synthesis and Photophysical Properties

High Resolution Image Download MS PowerPoint Slide A donor−acceptor−donor molecule, PcZn−Pim−PcZn triad, which would be applied to improve the light absorption efficiency and achieve the efficient charge-separation states for appropriately long times, was prepared by reacting 3,4,9,10-perylene-tetracarboxylic dianhydride (Pim) with t Bu 3 (NH 2 )PcZn at 190 °C. The charge-separation process is anticipated to occur via the excited singlet state of the zinc phthalocyanines ( 1 PcZn*) and perylene ( 1 Pim*), depending on the excitation wavelength of the light used in polar and nonpolar solvents. The lifetime of the charge separated states was estimated as 20−25 ns.