Femtosecond solvation dynamics study of hydrophobic and hydrophilic probes in various room temperature ionic liquids (RTILs) containing microemulsions

[Display omitted] •Femtosecond solvation dynamics in RTILs containing microemulsions are studied.•The size of the microemulsion increases with increasing ionic liquid concentrations.•The average solvation time decreases with increase in R value of the microemulsions.•The solvation is faster in [P13]...

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Bibliographic Details
Published in:Chemical physics letters 2021-03, Vol.767, p.138356, Article 138356
Main Authors: Bera, Nanigopal, Ghosh, Meghna, Nandi, Sourav, Sarkar, Nilmoni
Format: Article
Language:English
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Summary:[Display omitted] •Femtosecond solvation dynamics in RTILs containing microemulsions are studied.•The size of the microemulsion increases with increasing ionic liquid concentrations.•The average solvation time decreases with increase in R value of the microemulsions.•The solvation is faster in [P13][Tf2N] than [N3111][Tf2N].•The solvation of C153 becomes faster than C343 in the microemulsion system. The locations of hydrophobic and hydrophilic probes in room temperature ionic liquids (RTILs) containing microemulsions have been investigated using femtosecond solvation dynamics study, as the time correlated single photon counting (TCSPC) measurement has limitation in terms of detecting the ultrafast component of relaxation time less than 100 ps. Here, choice of two different RTILs unveils the information about the effect of acyclic and cyclic hydrocarbon chain on solvation dynamics. The exclusive information from dynamic light scattering (DLS) measurement, anisotropy study and the fluorescence correlation spectroscopy (FCS) judiciously help to perform detailed analysis of these systems.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2021.138356