title: Synthesis and CMC studies of 1-methyl-3-(pentafluorophenyl)imidazolium quaternary salts.
abstract: Critical Micelle Concentration (CMC) of sodium dodecyl sulfate (SDS), an anionic surfactant, has been investigated in 30 mM aqueous solutions of 1-benzyl-3-methylimidazolium chloride (1) and 1-methyl-3-(pentafluorophenyl)imidazolium chloride (2). The CMC of SDS is significantly lower in the presence of 2 as compared to that of 1. The decreased CMC of SDS in the presence of 2 is in accordance with its increased hydrophobicity due to the fluorinated side chain. The thermogravimetric analysis of compounds 1 and 2 shows that they are thermally stable up to about 290 degrees C.
authors.affiliation: Department of Chemistry, University of Missouri-Rolla, 142 Schrenk Hall, Rolla, MO 65409, USA.
authors.forename: Ayse
authors.initials: A
authors.lastname: Beyaz
authors.forename: Woon Su
authors.initials: WS
authors.lastname: Oh
authors.forename: V Prakash
authors.initials: VP
authors.lastname: Reddy
mesh_terms: D000838:Anions / Q000737:chemistry; D001593:Benzyl Compounds / Q000737:chemistry; D002855:Chromatography, Thin Layer; D057927:Hydrophobic and Hydrophilic Interactions; D007093:Imidazoles / Q000737:chemistry; D008823:Micelles; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D012997:Solvents / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013501:Surface-Active Agents / Q000737:chemistry*; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry; D005464:Fluorobenzenes; D005466:Fluorocarbons
chemical_list: D000838:Anions; D001593:Benzyl Compounds; D007093:Imidazoles; D008823:Micelles; D012967:Sodium Dodecyl Sulfate; D012996:Solutions; D012997:Solvents; D013501:Surface-Active Agents; D014867:Water; C496308:1-benzyl-3-methylimidazolium; C496309:1-methyl-3-(pentafluorophenyl)imidazolium; D005464:Fluorobenzenes; D005466:Fluorocarbons; C021292:benzyl chloride; C018100:1-methylimidazole