Probing the structure of a rotaxane with two-dimensional infrared spectroscopy.
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.
Larsen
Olaf F A
OF
FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ, Amsterdam, The Netherlands.
Bodis
Pavol
P
Buma
Wybren Jan
WJ
Hannam
Jeffrey S
JS
Leigh
David A
DA
Woutersen
Sander
S
D000577:Amides / Q000737:chemistry; D006860:Hydrogen Bonding; D015394:Molecular Structure; D043862:Rotaxanes / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods; D013386:Succinates
D000577:Amides; D043862:Rotaxanes; D013386:Succinates; C011116:succinamide