Accession Number : ADA193376
Title : Chemical and Photochemical Reactivity in Microemulsions and Waterless Microemulsions.
Descriptive Note : Periodic interim rept. nos. 1-5, 1 Nov 85-31 Jan 88,
Corporate Author : TOULOUSE-3 UNIV (FRANCE)
Personal Author(s) : Lattes, A ; Maurette, M T
Report Date : 10 Feb 1988
Pagination or Media Count : 31
Abstract : Recently, we have reported that it is possible to prepare microemulsions by replacing wate with the highly structured solvent, formamide. Physicochemical studies of such media have been published. We report here the first use of such non-aqueous microemulsions as reaction media. We carried out a Diels-Alder addition of methyl acrylate to cyclopentadiene in various formamide microemulsions. This type of reaction, which is highly sensitive to the polarity of the medium, can be used as a chemical probe of microemulsion. We replaced water with formamide, and we used a visual transparency criterion to determine the phase diagram. An ionic system was used with isooctane as oil, 1-butanol as cosurfactant and cetyltrimethylammonium bromide (CTAB) as surfactant. Figure 1 shows the pseudo ternary phase diagram for (formamide/CTAB = 2,1-butanol, isooctane) mixtures. We carried out a preliminary study of the influence of the various constituents of the microemulsion on the reaction.
Descriptors : *PHOTOCHEMICAL REACTIONS , *EMULSIONS , ADDITION , CHEMICAL REACTIONS , CYCLOPENTENES , MEDIA , METHACRYLATES , OPTICAL IMAGES , PENTADIENES , PHASE DIAGRAMS , PHYSICOCHEMICAL PROPERTIES , REACTIVITIES , RESPONSE , SOLVENTS , TRANSPARENCE , WATER
Subject Categories : Organic Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE