Solvation dynamics and rotation of coumarin 153 in a new ionic liquid/molecular solvent mixture model: [BMIM][TFSI]/propylene carbonate
作者： Yevheniia Smortsova , François-Alexandre Miannay , Hanna Oher , Bogdan Marekha , Julien Dubois
DOI: 10.1016/J.MOLLIQ.2016.10.008
关键词: Solvation 、 Ionic liquid 、 Computational chemistry 、 Physical chemistry 、 Chemistry 、 Viscosity 、 Diffusion 、 Molecule 、 Fluorescence anisotropy 、 Solvent 、 Propylene carbonate
摘要: Abstract 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 response gives tens hundreds picoseconds time-components, respectively. Both components are dependent on mixture composition. A characteristic power-law relation between integral times viscosity has extracted. As is controlled by translational motion, we chose to confront 〈τsolv〉 with diffusion coefficients BMIM+ cations propylene carbonate molecules, as well average rotational 〈τrot〉, obtained measuring time-resolved fluorescence anisotropy. Our results allow make hypothesis that this mainly influenced cation.
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