Star-burst polymers

The conformations of charged (regular) star-burst polymers (flexible ionic dendrimers), were analyzed theoretically in [33]. Referring to Fig. 4a, relevant architectural parameters for a star-burst polymer are the number of generations. 

Hence, counterion localization occurs when the number of generations in the star-burst polymer, g log2(Af/n), reaches some characteristic value, which is controlled by the same combination of the parameters, as for a PE star. 

Star-burst Oxadiazole Polymers. When a 1,3,5-trifunctional monomer is introduced in the synthesis (Scheme 8), a highly branched or star-burst polymer, or even a crosslinked polyaromatic oxadiazole may be expected to form according to the ratio of the monomers (45). A 1 1 1 ratio of 26 27 28 has been chosen to form a star-burst polyaromatic oxadiazole polymer 29. 

Qin et al. (238) used starburst PAMAM dendrimers to transfer genes into a murine cardiac transplantation model. These star-burst dendrimers are a special class of its kind, which are highly branched spherical polymers... 

Scheme 8. Synthesis of a star-burst polyaromatic oxadiazole polymer 29 (adapted from 45)...

Fullerene-derived star-burst conjugated polymers have been prepared by nucleophilic substitution of the tertiary NO2 groups (used as good leaving groups) of the hexanitrofullerene C6o(N02)6 with aniBne, oUgoanUine, and polyanduie [108,109],... 

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