Complexation of Ferrocene Derivatives by the Cucurbit[7]uril Host:  A Comparative Study of the Cucurbituril and Cyclodextrin Host Families

Angel E. Kaifer, Vladimir Sindelar, Mikhail V. Rekharsky, Yoshihisa Inoue, Kimoon Kim, Young Ho Ko, N. Selvapalam, Woo Sung Jeon, Kwangyul Moon, Sang Hyun Park, Hyungpil Chun, Jin Yong Lee, Eun Sung Lee, S. Samal & David Sobransingh
The formation of inclusion complexes between cucurbit[7]uril (CB[7]) and ferrocene and its derivatives has been investigated. The X-ray crystal structure of the 1:1 inclusion complex between ferrocene and CB[7] revealed that the guest molecule resides in the host cavity with two different orientations. Inclusion of a set of five water-soluble ferrocene derivatives in CB[7] was investigated by 1H NMR spectroscopy and calorimetric and voltammetric techniques. Our data indicate that all neutral and cationic guests form...
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