Conformational flexibility of a rotaxane thread probed by electronic spectroscopy in helium nanodroplets

Ultra-high-resolution spectroscopic studies have been performed to elucidate the conformational landscape of the succinamide-based thread 1 that is frequently employed in mechanically interlocked molecular assemblies. We show how dissolving single molecules into a helium nanodroplet enables us to resolve the broad absorption spectrum - which is normally observed - into the separate contributions of individual conformers that are populated under the employed experimental conditions. Excellent agreement is obtained with the results of molecular dynamics calculations. The absorption spectrum of each conformer reveals a splitting of the zero-phonon resonance that is different for each conformer and could thus serve as a spectral signature.


Published in:
Journal of the American Chemical Society, 131, 12902
Year:
2009
Publisher:
American Chemical Society
ISSN:
0002-7863
Keywords:
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2009-08-20, last modified 2018-03-17

Publisher's version:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)