Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 30, Pages 19998-20007Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp02037f
Keywords
-
Funding
- German National Academy of Sciences [LPDS 2011-18]
Ask authors/readers for more resources
Molecular rotors based on meso-substituted boron-dipyrromethane (BODIPY) are widely recognized fluorescent viscosity sensors. The viscosity dependence of their fluorescence arises from an efficient excited-state deactivation process that can only occur when molecular-scale motion is not hindered. Here, we use visible and IR pump-probe spectroscopies combined with TD-DFT calculations to show that this fluorescence deactivation takes place through a fast and irreversible process which does not involve intermediate electronic states. Our data indicate that nonradiative excited-state deactivation of BODIPY molecular rotors is practically independent of solvent polarity, but strongly governed by viscoelastic/free volume properties of the local environment in both low- and high-viscosity regimes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available