Supramolecular influence on cis-trans isomerization probed by ion mobility spectrometry.

Izabella Czerwinska (1) , Alexander Kulesza (2) , Chang Min Choi (2) , Fabien Chirot (3) , Anne-Laure Simon (2) , Johann Far (2) , Christopher Kune (2) , Edwin de Pauw (1) , Philippe Dugourd (2)

1 MS LAB - Mass Spectrometry Laboratory
2 ILM - Institut Lumière Matière [Villeurbanne]
3 ISA-ANABIO-MS - Analyse biomoléculaire par spectrométrie de masse - Biological Analysis by Mass Spectrometry

We used tandem ion mobility spectrometry measurements to investigate how the photo-isomerization of a chromophore (a methylpyridinium derivative) is affected by the complexation with a crown ether. A dramatic blue-shift of the photo-isomerization spectrum was observed upon complexation, which could be well reproduced by ab initio calculations. Our results support that the observed changes in the photo-physical properties of the chromophore originate from the charge-solvation of its pyridinium moiety by the host cage.

Domaines: Chimie analytique

Izabella Czerwinska, Alexander Kulesza, Chang Min Choi, Fabien Chirot, Anne-Laure Simon, et al.. Supramolecular influence on cis-trans isomerization probed by ion mobility spectrometry.. Physical Chemistry Chemical Physics, 2016, 18 (47), pp.32331-32336. ⟨10.1039/C6CP06168K⟩. ⟨hal-01546592⟩