The template-directed synthesis of porphyrin-stoppered [2]rotaxanes
The template-directed synthesis of porphyrin-stoppered [2]rotaxanes, (P. R. Ashton, M. R. Johnston, J. F. Stoddart, M. S. Tolley, and J. W. Wheeler), J. Chem. Soc., Chem. Commun. 1992, 16, 1128-1131.