Voltammetric behavior of poly(amidoamine) dendrimers containing nitroxyl radical end groups

A series of fully functionalized poly(amidoamine) dendrimers with 4-carboxy -2,2,6,6-tetramethylpiperidin-1-yloxyl end groups were prepared. Cyclic vol tammetric studies indicated that the pendant nitroxyl radical end groups ar e non-interacting electrochemically equivalent odor centers, which are oxid izable at the same potential. The results of controlled-potential electroly sis of the dendrimers showed that all the nitroxyl radical groups at the pe riphery of the dendrimers are accessible to the electrode surface for elect ron transfer. (C) 1999 Elsevier Science S.A. All rights reserved.