title: Probing the structure of a rotaxane with two-dimensional infrared spectroscopy.
abstract: Femtosecond 2D-IR spectroscopy has been used to study the structure of a [2]rotaxane composed of a benzylic amide macrocycle that is mechanically interlocked onto a succinamide-based thread. Both the macrocycle and the thread contain carbonyl groups, and by determining the coupling between the stretching modes of these groups from the cross-peaks in the 2D-IR spectrum, the structure of the macrocycle-thread system has been probed. Our results demonstrate that 2D-IR spectroscopy can be used to observe structural changes in molecular devices on a picosecond time scale.
authors.affiliation: FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ, Amsterdam, The Netherlands.
authors.forename: Olaf F A
authors.initials: OF
authors.lastname: Larsen
authors.forename: Pavol
authors.initials: P
authors.lastname: Bodis
authors.forename: Wybren Jan
authors.initials: WJ
authors.lastname: Buma
authors.forename: Jeffrey S
authors.initials: JS
authors.lastname: Hannam
authors.forename: David A
authors.initials: DA
authors.lastname: Leigh
authors.forename: Sander
authors.initials: S
authors.lastname: Woutersen
mesh_terms: D000577:Amides / Q000737:chemistry; D006860:Hydrogen Bonding; D015394:Molecular Structure; D043862:Rotaxanes / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods; D013386:Succinates
chemical_list: D000577:Amides; D043862:Rotaxanes; D013386:Succinates; C011116:succinamide