Fluorescence behavior of intramolecular charge transfer probe in anionic, cationic, and nonionic micelles

Effect of nanosize micelles of ionic and neutral surfactants on the photophysics of protonated 6-methoxyquinoline: Time-resolved fluorescence study

“…The lifetime determines the time available for the fluorophore to interact with or diffuse in its environment. Lifetime measurements can yield information about the molecular microenvironment around the fluorescent molecule and help us to understand the interaction between the probe molecule and micelles, the location of the probe in micelles and local viscosity and the polarity of the microenvironment [41][42][43][44][45][46][47][48][49][50]. Factors such as ionic strength, hydrophobicity, oxygen concentration, binding to macromolecules, and the proximity of molecules that can deplete the excited state by resonance energy transfer can all modify the lifetime of a fluorophore.…”

Steady state and time-resolved fluorescence spectroscopy of quinine sulfate dication in ionic and neutral micelles: Effect of micellar charge on photophysics

“…The fluorescence lifetime of a fluorophore in micellar solutions is very sensitive to the local environment around the probe and helps to understand the different interactions between the probe molecule and the micelle, the location of the probe in micelles and the local viscosity and polarity of the microenvironment [32][33][34][35][36][37][38][39][40][41]. Differential degrees of solvent motion around the fluorophore or partitioning of the fluorophore in distinct regions of a confined environment of micelles gives rise to different fluorescence lifetime components.…”

Investigating Two-Photon-Induced Fluorescence in Rhodamine-6G in Presence of Cetyl-Trimethyl-Ammonium-Bromide

“…Interactions with other surfactants (anionic and neutral) pose strong intermolecular interaction with R6G dye. The interaction of R6G dye molecule with cationic surfactant CTAB in water shows enhancement in R6G absorbance [32] and almost no change in fluorescence behavior [37]. Extent of spectral shift in absorbance of R6G in water is larger for anionic surfactant as compared to that of cationic surfactant.…”

“…Recently, extensive studies on intermolecular charge transfer have been carried out between several dye and surfactant molecule pairs [32][33][34][35]. Cationic dyes, such as, Rodamine-6G (R6G) and cationic surfactants, such as, Cetyl-trimethylAmmonium-Bromide (CTAB) have shown very weak intermolecular interaction as dye-surfactant system [32,36], where optical absorption and single photon fluorescence method have been used.…”

“…Cationic dyes, such as, Rodamine-6G (R6G) and cationic surfactants, such as, Cetyl-trimethylAmmonium-Bromide (CTAB) have shown very weak intermolecular interaction as dye-surfactant system [32,36], where optical absorption and single photon fluorescence method have been used. Interactions with other surfactants (anionic and neutral) pose strong intermolecular interaction with R6G dye.…”