Jump to main content
Jump to site search

Issue 13, 2017
Previous Article Next Article

Probe dependence on polar solvation dynamics from fs broadband fluorescence

Author affiliations

Abstract

Polar solvation dynamics of six 7-aminocoumarins and 4-aminophthalimide (4AP) are investigated using broadband FLuorescence UP-conversion Spectroscopy (FLUPS) combined with a global analysis based on time-dependent band-shape functions. The solvation dynamics of the coumarins in ethanol exhibit only minor differences but are, however, significantly different from that of 4AP. The band-shape parameters, width and asymmetry, exhibit much larger variation even among the coumarins and are correlated with the amount of excess excitation energy. Differences in the solvation dynamics of 4AP and a selected coumarin, C151, are also observed in dimethyl sulfoxide demonstrating the molecularity of solvation i.e. solvation depends on the solute and does not solely reflect the dynamic properties of the solvent. These differences are attributed to specific solute–solvent interactions due to hydrogen bonding. In a weakly interacting solvent, benzonitrile, the solvation dynamics of 4AP and C151 are nearly identical.

Graphical abstract: Probe dependence on polar solvation dynamics from fs broadband fluorescence

Back to tab navigation

Supplementary files

Publication details

The article was received on 01 Feb 2017, accepted on 02 Mar 2017 and first published on 07 Mar 2017


Article type: Paper
DOI: 10.1039/C7CP00706J
Citation: Phys. Chem. Chem. Phys., 2017,19, 8815-8825
  •   Request permissions

    Probe dependence on polar solvation dynamics from fs broadband fluorescence

    T. Kumpulainen, A. Rosspeintner and E. Vauthey, Phys. Chem. Chem. Phys., 2017, 19, 8815
    DOI: 10.1039/C7CP00706J

Search articles by author

Spotlight

Advertisements