TY - JOUR
T1 - Solvation dynamics and rotation of coumarin 153 in a new ionic liquid/molecular solvent mixture model
T2 - [BMIM][TFSI]/propylene carbonate
AU - Smortsova, Yevheniia
AU - Miannay, François Alexandre
AU - Oher, Hanna
AU - Marekha, Bogdan
AU - Dubois, Julien
AU - Sliwa, Michel
AU - Kalugin, Oleg
AU - Idrissi, Abdenacer
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Using picosecond time-correlated single photon counting (TCSPC) technique, C-153 fluorescent probe solvation and orientational dynamics in [BMIM][TFSI]/PC mixtures have been investigated. The bi-exponential fit of the solvation response gives tens and hundreds of picoseconds time-components, respectively. Both components are dependent on mixture composition. A characteristic power-law relation between integral solvation times and mixture viscosity has been extracted. As the solvation dynamics is controlled by translational motion, we chose to confront integral solvation times 〈τsolv〉 of C-153 in [BMIM][TFSI]/PC with the translational diffusion coefficients of BMIM+ cations and propylene carbonate molecules, as well as with average rotational times 〈τrot〉, obtained measuring time-resolved fluorescence anisotropy. Our results allow to make the hypothesis that the solvation dynamics of C-153 in this mixture is mainly influenced by the cation.
AB - Using picosecond time-correlated single photon counting (TCSPC) technique, C-153 fluorescent probe solvation and orientational dynamics in [BMIM][TFSI]/PC mixtures have been investigated. The bi-exponential fit of the solvation response gives tens and hundreds of picoseconds time-components, respectively. Both components are dependent on mixture composition. A characteristic power-law relation between integral solvation times and mixture viscosity has been extracted. As the solvation dynamics is controlled by translational motion, we chose to confront integral solvation times 〈τsolv〉 of C-153 in [BMIM][TFSI]/PC with the translational diffusion coefficients of BMIM+ cations and propylene carbonate molecules, as well as with average rotational times 〈τrot〉, obtained measuring time-resolved fluorescence anisotropy. Our results allow to make the hypothesis that the solvation dynamics of C-153 in this mixture is mainly influenced by the cation.
U2 - 10.1016/j.molliq.2016.10.008
DO - 10.1016/j.molliq.2016.10.008
M3 - Article
AN - SCOPUS:85002061896
SN - 0167-7322
VL - 226
SP - 48
EP - 55
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
ER -