Dendrimer analogs

Fig. 4.9 Second-generation POMAM dendrimer analogous to that in Fig. 4.8 (according to Vogtle, Friedhofen)...

A cored porphyrin-dendrimer with poly(benzyl ether) branches synthesized by Aida s group [99] was the first porphyrin-dendrimer reported in the literature. Since then, seminal studies covering the areas of oxygen storage [100], catalysis [101], electrochemical, and photophysical properties [102] have been reported based on core porphyrin dendrimer analogs, prepared by a suitable combination of a met-aUoporphyrin center, and the chemical structure of branch units and surface end groups. 

Alternatively, the one-step polymerization of branched monomers results in what is called a hyperbranched polymer [53] possessing a higher degree of polydispersity and lower degree of branching compared to the analogous dendrimer. 

In summary, gel electrophoresis is a very convenient method to assess the purity of dendrimers, to estimate molecular weight of similar materials, or to probe the interaction between various dendrimers and important biopolymers such as DNA. It is noteworthy that capillary electrophoresis (CE), which offers analogous features to gel electrophoresis, also has shown great potential in... 

One of the first results on the use of phosphine dendrimers in catalysis was reported by Dubois and co-workers [16]. They prepared dendritic architectures containing phosphorus branching points which can also serve as binding sites for metal salts. These terdentate phosphine-based dendrimers were used to incorporate cationic Pd centers in the presence of PPh3. Such cationic metalloden-dritic compounds were successfully applied as catalysts for the electrochemical reduction of C02 to CO (e.g. 9, Scheme 9) with reaction rates and selectivities comparable to those found for analogous monomeric palladium-phosphine model complexes suggesting that this catalysis did not involve cooperative effects of the different metal sites. 

---