Photophysical Studies in AOT Films Deposited on Fused Silica Slides

The Use of Coumarins as Environmentally-Sensitive Fluorescent Probes of Heterogeneous Inclusion Systems

“…Reverse micelles, generated in organic solvents, have also been widely investigated using coumarin fluorescence [ 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 ]. Levinger et al reported on the immobilization of water at the surfactant interfaces in reverse micelles using the coumarin derivative C343 [ 93 ], and subsequently published a review of ultrafast dynamics in such systems [ 94 ].…”

Time-resolved luminescence studies in hydrogen uranyl phosphate intercalated with amines

“…The decays of the first three bands of the photoluminescence spectra of the compounds with 100% intercalation ratios (HUPBZ and HUPHAM), were analyzed with Lianos 0 model [46][47][48][49][50][51][52] of stretched exponential. This model can be applied to compounds with restricted geometry and mobile reactants (donor and quencher molecules).…”

“…Studies of this compound has been centered on the structure [8][9][10][11], reactivity [12][13][14][15], vibrational spectroscopy [16], synthesis and characterization of intercalation compounds with different cationic species [17][18][19], diffusion and protonic conductivity mechanism [20][21][22][23][24][25][26][27][28], and chemisorption properties of HUP bound to biomass of bacteria [29][30][31][32][33]. Photoluminescence properties [34][35][36][37][38][39], have also been investigated in the literature, but they are not analyzed in terms of restricted geometry [40][41][42][43][44][45][46][47][48][49][50][51][52]. In this paper we report the characterization of four HUP intercalation compounds with aminium cations by timeresolved luminescence spectroscopy, and the results are analyzed by taking into account a model of reaction...…”

Spectral narrowing in a rhodamine-doped layered TiO2/surfactant thin film

“…It was chosen because it readily gives optically uniform films on metal or metal oxide substrates, without any other additive. 10 Rh6G is soluble in reverse micellar solutions, where it is solubilized in the dispersed phase, i.e., in the reverse micelles. To make the organic film, a glass slide supporting a TiO 2 film, made as above, was dipped in the solution, it was left to dry in air and it was then used for measurements.…”

“…This is due to the ͑partial͒ organization of the surfactant units making the film, due to their amphiphilic nature. 10 As mentioned before, films were also excited at 355 nm. The Rh6G absorption cross section is very low at this wavelength, as can be seen from its absorption spectrum shown in Fig.…”