Positive dendritic effects on the electron-donating potencies of poly(propylene imine) dendrimers.
[structure: see text] Two series of poly(propylene imine), PPI, dendrimers terminated with a redox-active donor, 4-dimethylaminobenzyl (4-DMAB), including their respective nondendronized model compounds, are reported. In these two series, a positive dendritic effect was observed for the formation of charge-transfer (CT) complexes between the dendrimers and 7,7,8,8-tetracyanoquinodimethane (TCNQ). However, the nondendronized compounds did not form CT complexes with TCNQ, even though their redox potentials are similar to those of the 4-DMAB units attached to the dendrimers.
Ong
Winston
W
Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA.
McCarley
Robin L
RL