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Abstract Fullerene tweezers which have a rigid acetylenic spacers were synthesized and their inclusion abilities for C60 were examined by UV spectroscopy. From the spectra, the association constants were determined using Benesi-Hildebrand method. Fullerene tweezers with a 1,4-bis(4-oxycarbonylphenyl)butadiyne spacer showed the highest association constant for C60 (39300 ± 250 dm3mol−1 in benzene).
Matsubara et al. (1998) studied this question.