Charm bracelet polymers

Various kinds of polymeric fullerenes can be prepared by using functional polymers to react with fullerenes, or by synthesizing polymers in the presence of fullerenes. From a structural point of view, these polymer are divided into four main categories (1) polymers with fullerenes physically incorporated into the foreign polymeric network without forming covalent bonds, (2) fullerene homopolymers formed via [2 + 2] cycloaddition, (3) pearl necklace polymers with fullerenes mutually linked covalently to form polymer chains, and (4) charm bracelet polymers containing pendant fullerene substitutes. All these polymers have been critically reviewed by Winkler et al. [163],... 

The affinity of Cgo towards carbon nucleophiles has been used to synthesize polymer-bound Cgo [120] as well as surface-bound Cjq [121]. Polymers involving G q [54, 68, 69] are of considerable interest as (1) the fullerene properties can be combined with those of specific polymers, (2) suitable fullerene polymers should be spin-coatable, solvent-castable or melt-extrudable and (3) fullerene-containing polymers as well as surface-bound Cgo layers are expected to have remarkable electronic, magnetic, mechanical, optical or catalytic properties [54]. Some prototypes of polymers or solids containing the covalently bound Cjq moiety are possible (Figure 3.11) [68,122] fullerene pendant systems la with Cjq on the side chain of a polymer (on-chain type or charm bracelet ) [123] or on the surface of a solid Ib [121], in-chain polymers II with the fullerene as a part of the main chain ( pearl necklace ) [123], dendritic systems III, starburst or cross-link type IV or end-chain type polymers V that are terminated by a fullerene unit For III and IV, one-, two-and three-dimensional variants can be considered. In addition, combinations of all of these types are possible. 

Benincori T, Brenna E, Sannicolo F, Trimarco L, Zotti G and Sozzani P 1996 The first charm bracelet conjugated polymer an electroconducting polythiophene with covalently bound fullerene moieties Angew. Chem. Int. Edn. Engl. 35 648-51... 

Type 2 polymers bearing pendant fullerenes (pendant charm bracelet or on-chain type) ... 

Benincori, T, E. Brenna, E Sannicolo, L. Trimarco, G. Zotti, and P. Sozzani. 1996. The first charm bracelet conjugated polymer An electroconducting polythiophene with covalently bound fuller-ene moieties. Angew Chem IntEd Engl 35 648-651. 

Without doubt, this is by far the most studied family of Cso-polymers, also called on-chain or charm-bracelet, with a wide range of potential applications (Chapter 2). 

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