Dynamics of excited-state reactions in reversed micelles. 1. Proton transfer involving a hydrophilic fluorescent probe

A Fourier Transform Infrared Study on the Structure of Water Solubilized by Reverse Aggregates of Sodium and Magnesium Bis(2-ethylhexyl)sulfosuccinates in Organic Solvents

“…Consider the following: (i) The dependence of several properties of reverse aggregateMicroemulsions are transparent or translucent, isotropic, solubilized water on W/S (including microscopic polarity and thermodynamically stable solutions consisting of at least as measured by solvatochromic probes) can be explained three components: oil, water, and a surfactant. Depending without resorting to the presence of layers of solubilized on the continuous phase, they are classified as oil-in-water water (11)(12)(13). (ii) Authors have rationalized their data by microemulsions (O/W mEs) and water-in-oil microemul-invoking the presence of one to four types of water (14-sions (W/O mEs).…”

Properties of surface-cross-linked micelles probed by fluorescence spectroscopy and their catalysis of phosphate ester hydrolysis

“…Pyranine and 2-naphthol are both photoacids. The pK a values for the ground and excited state of pyranine are 7.2 and 0.5, respectively [21], and those for 2-naphthol are 9.3 and 2.8 [22,23]. Excitation thus makes both compounds more acidic, and the ratio between the protonated and deprotonated excited states can be used to probe a number of parameters including local pH, polarity, and the interactions between the probes and their surroundings [23,24].…”

“…Pyranine is a photoacid whose excited state (pK Ã = 0.5) is much more acidic than the ground state (pK a = 7.2) [21]. As shown by Fig.…”

Proton dissociation dynamics in the aqueous layer of multilamellar phospholipid vesicles

“…(i) The rate of proton dissociation, which is function of the capacity of water to rapidly hydrate the proton (Huppert et al, 1982;Bardez et al, 1984;Politi & Chaimovich, 1986). This process dominates at the most initial phase and thus contributes substantially to the steady-state emission of q)OH*.…”

“…For these reasons the lifetime of d~OH* is prolonged in solution of low amo, and the steady-state emission of this form is in{ensified (Huppert et al, 1982;Bardez et al, 1984;Politi & Chaimovich, 1986;Gutman & Nachliel, 1990).…”