Fluorescence Studies on Morphological Change of Oil-in-Water Microemulsions upon Dilution with Water

Article abstract of DOI:10.1021/j150648a035

The morphological change of oil-in-water microemulsion (ME) has been studied by steady-state and time-resolved fluorimetry.The standard ME (ME₁) consisted of sodium hexadecyl sulfate (7.2percent wt/wt), pentanol (10.8percent), hexadecane (2.7percent), and water (79.3percent).The fluorescence quenching of pyrene by N,N-dihexylaniline was used as a probe reaction.Both nonlinear Stern-Volmer relationship and nonexponential fluorescence decay curves of the pyrene monomer in ME containing the quencher were analyzed by Poisson statistics, which revealed that ME is subdivided upon dilution with water.