Journal ArticleDOI
Protolytic photodissociation of hydroxyaromatic compounds in micelles and lipid bilayer membranes of vesicles
Reads0
Chats0
TLDR
Experimental results give evidence of two localization sites of naphthols in the microphase of micellar solutions and phospholipid vesicles by fluorescence spectra and kinetics.Abstract:
Protolytic photodissociation of some hydroxyaromatic compounds, ArOH (1- and 2-naphthol, chlorosubstituted naphthols), was studied in micellar solutions and phospholipid vesicles by fluorescence spectra and kinetics. Experimental results give evidence of two localization sites of naphthols in the microphase of these systems. In lipid bilayer membranes of vesicles there are two comparable fractions of ArOH molecules, one of which undergoes photodissociation but the other does not dissociate. In micelles, a minor fraction (few percent) of ArOH molecules, which are located probably in the core of the micelle, do not take part in excited-state proton-transfer reaction. These phenomena reflect heterogeneous structure and dynamic properties of lipid bilayer membranes and micelles.read more
Citations
More filters
Journal ArticleDOI
Elementary steps in excited-state proton transfer.
TL;DR: The theory for these diffusion-influenced geminate reactions has been developed, showing nice agreement with experiment, and the effect of inert salts, bases, and acids on these reactions is analyzed.
Journal ArticleDOI
Solvatochromism of β-Naphthol
TL;DR: In this paper, the authors measured the spectra of 2-naphthol and 2-methoxynaphthalene in a series of pure solvents and found that the majority of the Stokes shift is due to hydrogen bonding rather than dipole−dipole interactions.
Journal ArticleDOI
Effect of submicellar concentrations of conjugated and unconjugated bile salts on the lipid bilayer membrane.
TL;DR: Steady-state and time-resolved fluorescence of the two excited-state prototropic forms of 1-naphthol indicate that submicellar bile salt concentration induces hydration of the lipid bilayer membrane into the core region.
Journal ArticleDOI
1-Naphthol as a Sensitive Fluorescent Molecular Probe for Monitoring the Interaction of Submicellar Concentration of Bile Salt with a Bilayer Membrane of DPPC, a Lung Surfactant
TL;DR: Steady-state and time-resolved fluorescence of the two excited state prototropic forms of 1-naphthol indicate that the incorporation of monomeric bile salt molecules in the lipid bilayer membrane induces appreciable wetting of the bilayer up to the hydrocarbon core region, even at very low (≤1 mM) concentrations of the bile salts.
Journal ArticleDOI
Excited state proton transfer in the lysosome of live lung cells: normal and cancer cells.
Rajdeep Chowdhury,Abhijit Saha,Amit Kumar Mandal,Batakrishna Jana,Surajit Ghosh,Kankan Bhattacharyya +5 more
TL;DR: Dynamics of excited state proton transfer (ESPT) in the lysosome region of live lung cells (normal and cancer) is studied by picosecond time-resolved confocal microscopy using a fluorescent probe, pyranine, and it is confirmed that HPTS resides in the LYSosome for both of the cells.