title: Dynamics of solvation and rotational relaxation of Coumarin 153 in ionic liquid confined nanometer-sized microemulsions.
abstract: The effects of confinement of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate on solvation dynamics and rotational relaxation of Coumarin 153 (C-153) in Triton X-100/cyclohexane microemulsions have been explored using steady-state and picosecond time-resolved emission spectroscopy. The steady-state and rotational relaxation data indicate that C-153 molecules are incorporated in the core of the microemulsions. The average rotational relaxation time increases with increase in w ([bmim][BF(4)]/[TX-100]) values. The solvent relaxation in the core of the microemulsion occurs on two different time scales and is almost insensitive to the increase in w values. The solvent relaxation is retarded in the pool of the microemulsions compared to the neat solvent. Though, the retardation is very small compared to several-fold retardation of the solvation time of the conventional solvent inside the pool of the microemulsions.
authors.affiliation: Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.
authors.forename: Debdeep
authors.initials: D
authors.lastname: Chakrabarty
authors.forename: Debabrata
authors.initials: D
authors.lastname: Seth
authors.forename: Anjan
authors.initials: A
authors.lastname: Chakraborty
authors.forename: Nilmoni
authors.initials: N
authors.lastname: Sarkar