Solvation dynamics in DMPC vesicle in the presence of a protein

Ultrafast dynamics in a nanocage of enzymes: Solvation and fluorescence resonance energy transfer in reverse micelles

“…The observation is consistent with the fact that in the polar environment, the fluorescence spectrum of a solute (C500) with a higher excited-state dipole moment compared to that in the ground state is the superposition of emission from different excited states of diverse degrees of solvation [14]. The broadening of emission spectrum may also be indicative of spatial microheterogeneity of the immediate environment of the probe C500 [20][21][22].…”

Photophysics of a β-carboline based non-ionic probe in anionic and zwitterionic liposome membranes

“…1r and 2r are the two reorientation times of the probe in lipids, a 1r and a 2r are the pre-exponents that provide the fraction of the two reorientation times. Since lipids are known to associate very much to form elongated structures, observation of such residual anisotropy in the time-resolved analysis is common (Lakowicz, 1999;Dutta et al, 2003). The fast component of the decay in lipid systems is assigned to the rotation of the probe in the lipid media while the long component is ascribed to the overall tumbling motion of the lipid containing the probe.…”

“…An increase in the rigidity of the neighboring environment of a fluorophore results in an increase in its fluorescence anisotropy. The time-dependent decay of the fluorescence anisotropy provides additional information about the rotational motion and/or rotational relaxation of the fluorophore in organized assemblies (Maiti et al, 1997;Lakowicz, 1999;Dutta et al, 2003;Dutt, 2003;Das et al, 2006). In order to see how the rigidity of the lipid membranes affect the dynamics of the probe, the time-resolved fluorescence anisotropy of AODIQ in buffer and in membranes have been studied.…”

Early events associated with the excited state proton transfer in 2-(2′-pyridyl)benzimidazole

“…The slow dynamics of ESPT of in aqueous micelle and reverse micelles is explained as a result of slow solvation and slowing down of the proton transfer process as such. [13][14][15] However, a 600-800 ps growth is observed in neat aqueous solutions at pH 3 as well. 8 The origin of this long rise time is not understood as proton transfer is known to occur within 150 fs in hydrogenbonded acid-base complexes.…”