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Cooperative C(60) binding to a porphyrin tetramer arranged around a p-terphenyl axis in 1:2 host-guest stoichiometry.

[structure: see text] Porphyrin tetramer 1 was newly designed and synthesized to construct a novel cooperative [60]fullerene (C(60)) binding system. Compound 1 has a p-terphenyl axis, which is expected to act as a scaffold for a guest-binding information transducer. In toluene, 1 can bind 2 equiv of C(60) to produce a 1:2 1/C(60) complex with association constants of 5800 M(-1) (K(1)) and 2000 M(-1) (K(2)). These values are significantly greater than those for control porphyrin dimers such as 2 and 3.[1]

References

  1. Cooperative C(60) binding to a porphyrin tetramer arranged around a p-terphenyl axis in 1:2 host-guest stoichiometry. Kubo, Y., Sugasaki, A., Ikeda, M., Sugiyasu, K., Sonoda, K., Ikeda, A., Takeuchi, M., Shinkai, S. Org. Lett. (2002) [Pubmed]
 
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