The first demonstration of molecular queuing in pseudo[n]polyrotaxanes: A novel variant of supramolecular motion

Angewandte Chemie (International Edition in English)

Volumn 35, Issue 19, 1996, Pages 2238-2241

  Mason, Philip E ^a   Parsons, Ian W ^a   Tolley, Malcolm S ^a  

^a UNIVERSITY OF BIRMINGHAM   (United Kingdom)

Author keywords

Cyclophanes; Polymers; Rotaxanes; Supramolecular chemistry

Indexed keywords

EID: 0030445042     PISSN: 05700833     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.199622381     Document Type: Article

References (27)

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3. See A. Harada, J. Li, T. Nakamitsu, M. Kamachi, J. Org. Chem. 1993, 58, 7524-7528; A. Harada, J. Li, M. Kamachi, J. Am. Chem. Soc. 1994, 116, 3192-3196; G. Wenz, E. Vonderbey, L. Schmidt, Angew. Chem. 1992, 104, 758; Angew. Chem. Int. Ed. Engl. 1992, 31, 783-785; G. Wenz, F. Wolf, M. Wagner, S. Kubik, New J. Chem. 1993, 17, 729-738; X. Shen, D. Xie, H. W. Gibson, J. Am. Chem. Soc. 1994, 116, 537-548; H. W. Gibson, H. Marand, Adv. Mater. 1993, 5, 11-21; H. W. Gibson, S. Liu, P. Lecavalier, C. Wu, Y. Shen, J. Am. Chem. Soc. 1995, 117, 859-874. For a fairly recent review, see D. B. Amabilino, I. W. Parsons, J. F. Stoddart, Trends. Polym. Sci. 1994, 2, 146-152.
4. See A. Harada, J. Li, T. Nakamitsu, M. Kamachi, J. Org. Chem. 1993, 58, 7524-7528; A. Harada, J. Li, M. Kamachi, J. Am. Chem. Soc. 1994, 116, 3192-3196; G. Wenz, E. Vonderbey, L. Schmidt, Angew. Chem. 1992, 104, 758; Angew. Chem. Int. Ed. Engl. 1992, 31, 783-785; G. Wenz, F. Wolf, M. Wagner, S. Kubik, New J. Chem. 1993, 17, 729-738; X. Shen, D. Xie, H. W. Gibson, J. Am. Chem. Soc. 1994, 116, 537-548; H. W. Gibson, H. Marand, Adv. Mater. 1993, 5, 11-21; H. W. Gibson, S. Liu, P. Lecavalier, C. Wu, Y. Shen, J. Am. Chem. Soc. 1995, 117, 859-874. For a fairly recent review, see D. B. Amabilino, I. W. Parsons, J. F. Stoddart, Trends. Polym. Sci. 1994, 2, 146-152.
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26. 6]DMSO.
27. 6]DMSO is δ = 9.48 (δf) and that for a protons on the bound cyclophanes is taken to be δ = 9.10 (δb). For the 90 MHz spectrum the chemical shift of the α protons of a type A cyclophane is 9.35. This is an average arising from the following: fraction of free type A cyclophanes × δf + fraction of bound type A cyclophanes × δb = 9.35; fraction of type A that are free = 0.66 (F); fraction of type A that are bound = 0.34 (C); Total fraction of bound cyclophanes = [(C × integral of type A x protons + integral of type B a protons)/(total integral of all x protons)] = 0.41.