Dicyclic polymers

Alternatively, Tezuka et al. have proposed an electrostatic self-assembly and covalent fixation process for the effective synthesis of monocyclic and three dicyclic polymer structures [124,125]. The key reaction for formation of cyclic polymers is an electrostatic self-assembly and covalent fixation process, as indicated in Fig. 36. 

Scheme 1S.6 Click chemistry between a monocyclic prepolymer having an alkyne group and linear telechelic precursor with azide end groups, resulting in the selective formation of a fcndged-dicyclic manacle-shaped polymer.

A three-armed star telechelic precursor having cyclic ammonium salt groups has been prepared to form a self-assembly with one unit of tricarboxylate counteranion under dilution in order to keep the balance of the charges. The subsequent covalent fixation by heating produced a fused dicyclic, that is, 0-shaped, polymer effectively (Tezuka et al, 2003a). 

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