Classification of Polyfullerenes

As a criterion for the classification, we have ordered the many families of polyfullerenes taking into account both their increasing chemical complexity and the difficulty in synthesizing them. In this sense, all-Cso and organometallic polymers are presented first, followed by the random crosslinked ones, since their synthesis 

With the term all-fullerene polymers are intended specifically those materials or structures constituted exclusively by fullerene units covalently linked to each other. Some authors refer to them as intrinsic polymers [17]. 

The first example was described by Rao in 1993 who, after exposure of Cgo to visible light, obtained an insoluble photopolymerized film [18]. Soon thereafter, the first piezopolymerized polyfullerene was also reported [19]. Beside polymerizations carried out in the presence of light or with pressure, electron beam-induced [20] and plasma-induced polymerization [21] are also known. 

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