Fullerenes as encapsulating hosts

Concave Reagents, p. 311 Concepts in Crystal Engineering, p. 519 Fullerenes as Encapsulating Hosts Preparation, Detection, and Structures of Endohedral Fullerenes, p. 579 Self-Assembling Capsules, p. 1231... 

Fullerenes as Encapsulating Hosts Preparation, Detection, and Structures of Endohedral Fullerenes. p. 579... 

A. L. Balch, FuUerenes as encapsulating hosts preparation, detection, and structures of endohedral fullerenes, in Encyclopedia of Supramolecular Chemistry (eds J. L. Atwood and J. W. Steed), Marcel Dekker, New York, 2004, p. 579. 

One of the first reports of porphyrin-based fullerene recognition that included crystallographic evidence for encapsulation in a cyclic structure came from the Aida group. Here, the receptor, 7, is a cyclic dimer of zinc porphyrins (Figure 8). At the time of publication in 2001, system 7 held the record for the largest host-Ceo association constant (K = 6.7 x 10 M in benzene). The crystal structure also provided support for the presence of 7T interactions, as evidenced by separations of 2.765 and 2.918 A between the Zn atom and fullerene carbon atoms. 

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