Description conjugate preparation

Chirality, in the field of fullerenes, is not limited to the chiral carbon cages themselves. In 1992, the first enantiomerically pure covalent fullerene adducts, Cso-sugar conjugates, were prepared [39]. With the explosive development of covalent fullerene chemistry during the last few years [27-32], an increasing number of chiral C50 and C70 derivatives has been published [27, 33], and the need for an appropriate configurational description became pressing [34]. 

The first EL from PPV stimnlated the work of chemists to develop new alternative routes to improve the preparation of this polymer. The idea of having a polymer soluble in organic solvent already in its conjugated form led to the introduction of solubilising groups in the PPV backbone. Some of the most studied structures that were developed are reported in Table 5.1. A detailed description of the synthesis for their preparation is not given references are reported for each structure [70-85]. Some of the general criteria followed to prepare these materials are discussed. 

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