1999
DOI: 10.1021/jp984527y
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Excited-State Behavior of 7-Diethylaminocoumarin Dyes in AOT Reversed Micelles:  Size Effects

Abstract: Photophysical properties of two 7-diethylaminocoumarin dyes belonging to the family of coumarinylbenzopyrano pyridines (BC I and BC II), and a third dye, 7-diethylamino-4-trifluoromethyl coumarin (C 35), are reported in Aerosol OT (AOT) and water-in-oil (n-heptane/AOT/water) microemulsions. In the case of BC I, emission arising from two different environments for the dye is observed. Results of the steady-state fluorescence anisotropy experiments also support the presence of two different environments. At low … Show more

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Cited by 56 publications
(35 citation statements)
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“…Our results challenge this expectation because, as was demonstrated, acid-base equilibriums change dramatically at the RM interfaces due to the enormous ionic strength. [8,47] Moreover, we did not see the OÀH stretching frequency of the nonionized phosphoric group at any W 0 values investigated.…”
Section: Resultscontrasting
confidence: 55%
See 1 more Smart Citation
“…Our results challenge this expectation because, as was demonstrated, acid-base equilibriums change dramatically at the RM interfaces due to the enormous ionic strength. [8,47] Moreover, we did not see the OÀH stretching frequency of the nonionized phosphoric group at any W 0 values investigated.…”
Section: Resultscontrasting
confidence: 55%
“…[3][4][5][6][7] The interfacial region is known to have high ionic strength and a heterogeneous micropolarity. [8] The dialkyl phosphates and their alkaline salts are of interest in extraction processes because of their complexing properties toward metal ions and are important in hydrometallurgy, the nuclear industry, and biological materials. [9] Among them, sodium bis(2-ethylhexyl) phosphate (NaDEHP, Scheme 1) has the particular property to give rise to RMs in organic solvents, as first pointed out by Eicke and Christen.…”
Section: Introductionmentioning
confidence: 99%
“…either inside the pool (free) or at the interface (bound) change with W 0 [4][5][6][7][8]. The interfacial region is also known to have high ionic strength and a heterogeneous micropolarity [1,9].…”
Section: Introductionmentioning
confidence: 99%
“…Synthesis of Novel Coumarin and Benzocoumarin Derivatives 1295 solvents depending on the substituent, and so this chromophore appears sensitive to its environment [43]. For coumarin with two fused rings (i.e.…”
Section: Nov-dec 2007mentioning
confidence: 99%