3. Functionally layered dendrimers: a new tetravalent building block and its application to multichromophoric light harvesting systems Posted on September 8, 2005November 30, 2016 by dlg6123 W. R. Dichtel, S. Hecht, J. M. J. Fréchet, Org. Lett. 2005, 7, 4451-4454. Full Text.