title: Towards Synthetic Molecular Muscles: Contraction and Stretching of a Linear Rotaxane Dimer We are grateful to M. Jean-Daniel Sauer and Dr. Roland Graff for high-field NMR experiments, Hélène Nierengarten and Raymond Hubert for mass determinations. M.C.J. thanks the European Commission for a Grant (TMR Contract No. ERBFMBICT972547). We also thank the CNRS for financial support (Programme Physique et Chimie du Vivant).
authors.affiliation: Laboratoire de Chimie Organo-Minérale UMR 7513 du CNRS Université Louis Pasteur Faculté de Chimie 4, rue Blaise Pascal 67070 Strasbourg Cedex (France).
authors.initials: MC
authors.lastname: Jiménez
authors.initials: C
authors.lastname: Dietrich-Buchecker
authors.initials: JP
authors.lastname: Sauvage