Synthesis, characterization and surface properties of long chain β-hydroxy-γ-alkyloxy-N-methylimidazolium surfactants

Aggregation behavior of non-cytotoxic ester functionalized morpholinium based ionic liquids in aqueous media

“…Interestingly, the investigated SAILs have been found to be non-cytotoxic in the described concentration range, required for their applicability in many of the biological applications. It is expected that the present work along with earlier reported work on functionalization of alkyl chain via amide [17], via ester [28] and hydroxyl or ether [29] group will prompt other researchers to functionalize the alkyl chain appended with ionic head group to achieve better surface active properties of SAILs.…”

“…Our own group has reported the aggregation behavior of a variety of SAILs including those based on amino acid based cations [15][16][17] where it has been established that the nature of ionic head group, cation and length of alkyl chain governs the aggregation behavior of SAILs. Further, a careful examination of literature regarding aggregation of SAILs reveals that the introduction of an amide [17], ether or hydroxyl [28], and ester group [29], in the molecular structure of SAILs led to marked changes in their surface as well as bulk behavior. In this regard, the hydrophobic alkyl chain of SAILs is a key moiety which can be functionalized with a variety of functional groups to achieve better aggregation behavior of SAILs.…”

“…Pursuant to continued research on functionalized SAILS [17,28], we herein, report the synthesis, aggregation behavior and cytotoxicity of a series of three ester functionalized morpholinium based SAILs, [C n EMorph][Br] where n = 8, 12 and 16, in aqueous medium. A variety of parameters characteristic to aggregation such as critical aggregation concentration (cac), surface tension at the cac (c cac ), adsorption efficiency (pC 20 ), effectiveness of surface tension reduction (P cac ), Gibbs free energy of the aggregation (DG 0 agg ), Gibbs free energy of adsorption (DG 0 ads ), and aggregation number (N agg ) etc., have been deduced utilizing tensiometry, conductivity, steadystate fluorescence and isothermal titration calorimetry (ITC) measurements.…”

Effect of cationic head group on micellization behavior of new amide-functionalized surface active ionic liquids

“…In this regard, it has been shown that long chain b-hydroxy-galkyloxy-N-methylimidazolium SAILs bearing hydroxyl group 28 and COOH-functionalized imidazolium-based SAILs 29 possess lower cmc and superior surface activity compared to homologous non-functionalized SAILs. In this regard, it has been shown that long chain b-hydroxy-galkyloxy-N-methylimidazolium SAILs bearing hydroxyl group 28 and COOH-functionalized imidazolium-based SAILs 29 possess lower cmc and superior surface activity compared to homologous non-functionalized SAILs.…”

Online Only Supplement — Book of Abstracts of the 10th Euro Fed Lipid Congress, Cracow, Poland 23–26 September 2012

“…The enzyme system was found to consist of four enzymes, i.e., hydratase, dehydrogenase, isomerase, and enone reductase, and generated unique PUFA species such as hydroxy, oxo, and conjugated fatty acids as intermediates. Other unique PUFA transformations were also found in anaerobic bacteria 5,6 . Pediococcus sp.…”