Each branch of different generations of poly(propylenimine)-dendrimers is selectively bifunctionalized by easily accessible reagents. Sulfonic acid chlorides react readily with terminal primary amino groups of this dendrimer type in high yields. The sulfonamide dendrimers purely obtained in this way reveal a considerable synthetic potential. The substitution of the sulfonamide proton of each branch by means of alkyl and benzyl halides, respectively, can be used for a second multiple functionalization. Other convergently synthesized dendrons are grafted on by alkylation of such oligo sulfonamide dendrimers using dendritic halides resulting in structure perfect difunctionalized dendrimers.
periphery and 2(n+1) − 2 tertiary amine units in the interior. For comparison purposes, the behavior of a monodansyl reference compound (I) has also been investigated. The results obtained have shown that: (i) the absorption and fluorescence spectra of the reference compoundI are not affected by addition of Co2+ ions; (ii) in the case of the dendrimers, the absorptionspectra are unaffected, but a