ABSTRACT
Fluorescence is an emission in the Ultraviolet, visible, or Infrared domains, due to electronic transitions. Forster/ fluorescence resonance energy transfer (FRET) is particularly important in biology. It concerns non-radiative energy transfer due to long range dipole-dipole interactions between two fluorophores: one donor of energy and the other one acceptor. The easiest way to introduce fluorescent entities consists in grafting them to the terminal functions of dendrimers. The 1-pyrenemethylamine, anthracene, and naphthalene were used as terminal groups of PPH dendrimers in view of elaborating organic light-emitting diodes (OLEDs) but several difficulties were encountered. Different locations have been used to include fluorophores inside the structure of poly(phosphorhydrazone) PPH dendrimers: linked to the branching points, being the core, or linked to the core. In the case of poly(phosphorhydrazone) dendrimers, only an octa- substituted phthalocyanine was used as fluorescent core. As for classical fluorophores, the easiest way to obtain dendrimers bearing TPA fluorophores is their grafting as terminal functions.
