Photophysics and rotational relaxation dynamics of a β-carboline based fluorophore in cationic alkyltrimethylammonium bromide micelles

Study on metal nanoparticles synthesis and orientation of gemini surfactant molecules used as stabilizer

“…The lower value of zeta potential of Au NP (+28.5 ± 1 mV) as compared to Ag NP (+31.4 ± 1.2 mV) suggests that the relative number of surfactant molecules aggregate around the former is less than that of the latter. As a result of that some water molecules can enter in the micelles and penetrate to a certain depth [50]. Therefore, the probe molecules can reside inside the bilayers around the Au NPs.…”

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.…”

“…The fluorescence anisotropy measurement of a probe molecule has been established to be a most powerful and sensitive technique to know information about the complex micro heterogeneous environment [48][49][50]47,54]. Rotational relaxation and dynamics of a probe molecule in micellar assembly is determined using time resolved anisotropy measurements.…”

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.…”

“…The fluorescence anisotropy measurement of a probe molecule has been established to be a most powerful and sensitive technique to elucidate information about the complex micro heterogeneous environment [37][38][39][40][41]. In order to obtain the location and mobility of QSD molecule in micellar systems, time resolved anisotropy measurements were performed.…”