Dynamics of solvent and rotational relaxation of coumarin-153 in room temperature ionic liquid 1-butyl-3-methyl imidazolium tetrafluoroborate confined in poly(oxyethylene glycol) ethers containing micelles

Article Abstract:

The solvent and rotational relaxation of coumarin 153(C-153) in room-temperature ionic liquids (RTILs) 1-butyl-3-methyl-imidazolium tetrafluoroborate ([bmim][B[F.sub.4]]) and the ionic liquid confined in alkyl poly(oxyethylene glycol) ethers containing micelles is analyzed using octaethylene glycol monotetradecyl ether and octaethylene glycol monodecyl ether as surfactants to choose two surfactants of various chain length dependence on solvation dynamics in RTILs containing micelles. The rotational relaxation data is consistent with the fact that the C-153 molecule is more restricted in [C.sub.12][E.sub.8] than [C.sub.14][E.sub.8] micelles.

Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Imidazole, Analysis, Spectra, Optical properties, Ultraviolet spectroscopy, Structure

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Study of energy transfer from 7-amino coumarin donors to the rhodamine 6G acceptor in lecithin vesicles and sodium taurocholate-lecithin mixed aggregates

Article Abstract:

The energy transfer using 7-amino coumarin dyes as the donor and rhodamine 590 (Rh6G) as the acceptor is investigated in lecithin vesicles and sodium taurocholate (NaTC)-lecithin mixed aggregates using steady state and time-resolved fluorescence spectroscopy. The coumarin 153-Rh6G pair is the most efficient donor acceptor pair as reflected by the value of k(sub ET).

Science & research, Research, Amino acids, Energy transformation

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Solvation dynamics of Coumarin 480 in bile salt-cetyltrimethylammonium bromide (CTAB) and bile salt-Tween 80 mixed micelles

Article Abstract:

The retardation solvation dynamics of Coumarin 480 (C-480) in the Stern layer of the cetyltrimethyammonium bromide (CTAB)-sodium deoxycholate (NaDC) and Tween 80-NaDC mixed micelles compared to pure water using picosecond time-resolved emission spectroscopy is reported. The solvation time in pure Tween 80 is seen to be 1.21 ns, whereas in pure NaDC is 3.37 ns.

United States, Molecular dynamics

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