471907-87-6Relevant articles and documents
Validating interfacial behaviour of surface-active ionic liquids (SAILs) with computational study integrated with biocidal and cytotoxic assessment
Dani, Unnati,Bahadur, Anita,Kuperkar, Ketan
, (2019)
Surface-active ionic liquids (SAILs) belonging to the series of N-alkylmethylimidazolium halides [C8mimX] (X = Br, Cl, and BF4) and [CnmimBr] (n = 10, 12, 14, and 16) were employed to understand the influence of hydrophobicity of alkyl chain length and the chaotropicity of counter-ions of SAILs on the micellization, antimicrobial action and cytotoxicity properties. The micellization phenomenon of SAILs in an aqueous environment was examined employing tensiometry and steady-state fluorescence spectrophotometry. The corresponding interfacial parameters viz., critical micelle concentration (CMC), effectiveness (γCMC), surface pressure (ПCMC), maximum surface excess concentration (Гmax), and the minimum area engaged per molecule (Amin) at the air-water interface were evaluated at 303.15 K. These experimental findings were monitored and geometrically optimized theoretically using Gaussian software to highlight the recent advances in this field of theoretical calculations for putative structure. The simulation descriptors correlated the micellization behavior as a function of hydrophobicity which may contribute to obtaining awareness on their ecological behavior and fate. In addition, the biological screening of all the examined SAILs was undertaken with a combined experimental and theoretical (optimized) method against bacteria and fungus. Results revealed that SAILs with the alkyl chain-length greater than C8- act as a fair antimicrobial agent against the selected microbial strain which is attributed to the enhanced degree of SAILs hydrophobicity. The cytotoxicity of these imidazolium-based SAILs was also assessed on the cervical human cell line (HeLa) using the MTT cell viability assay and the data thus obtained were subjected to statistical analysis.
Special effect of ionic liquids on the extraction of flavonoid glycosides from Chrysanthemum morifolium Ramat by microwave assistance
Zhou, Ying,Wu, Datong,Cai, Pengfei,Cheng, Guifang,Huang, Chaobiao,Pan, Yuanjiang
, p. 7683 - 7699 (2015)
A microwave-assisted extraction approach based on ionic liquids of different chain lengths was successfully applied to the extraction of ten flavonoid glycosides from the flowering heads of Chrysanthemum morifolium Ramat. The pretreated sample was quantified by HPLC-ESI-MSn. The main components were identified as flavonoid glycosides, including three luteolin glycosides, three apigenin glycosides, three kaempferide glycosides, and one acacetin glycoside according to the characteristics of the corresponding CID mass spectrometric patterns. Eight ionic liquids from the imidazolium family with different chain lengths, namely, 1-alkyl-3-methylimidazolium bromide, [Cnmim]Br, (n = 2-16) were studied as extraction medium in water. Results indicated that alkyl chain length had an irregular impact on the extraction efficiency. Moreover, the best extraction efficiency was achieved by 1-dodecyl-3-methylimidazolium bromide aqueous solution ([C12mim]Br). Besides the alkyl chain length of the cations, other factors influencing extraction efficiency were systematically investigated, including concentration of the IL solutions, extraction time, matrix-to-solvent ratio and irradiation power.
Highly efficient conductivity modulation of cinnamate-based light-responsive ionic liquids in aqueous solutions
Yang, Jie,Wang, Huiyong,Wang, Jianji,Zhang, Yue,Guo, Zhongjia
, p. 14979 - 14982 (2014)
A new class of cinnamate-based light-responsive ionic liquids was synthesized and characterized, and these ionic liquids with longer alkyl chains showed a remarkable increase in ionic conductivity under UV light irradiation in aqueous solutions.
Aggregation Behavior of Imidazolium-Based Amino Acid Ionic Liquid Surfactants in Aqueous Solution: The Effect of Amino Acid Counterions
Yang, Xiu-Jie,Zhang, Peng,Lv, Wenjiao,Zhou, Ting,Li, Peng,Zhao, Mingwei
, p. 515 - 523 (2019)
Three kinds of imidazolium-based amino acid ionic liquid surfactants (AAILS), 1-tetradecyl-3-methylimidazolium L-aminopropionic acid salt ([C14mim][Ala]), 1-tetradecyl-3-methylimidazolium L-2-pyrrolidinecarboxylic acid sal
Influence of tetra ethyl ammonium bromide (C2H5)4NBr on the aggregation behavior of surface active ionic liquid 1-tetradecyl-3-methylimidazolium bromide [C14mim][Br]
Kaur, Gagandeep,Kumar, Harsh,Priya
, (2020)
In this work, we tend to explore the effect of organic electrolyte i.e. tetra ethyl ammonium bromide (C2H5)4NBr on the aggregation behavior of 1-tetradecyl-3-methylimidazolium bromide [C14mim][Br] by utilizing electrical conductivity measurement, refractive index measurement, UV–Visible spectroscopy as well as FT-IR spectroscopic study. First of all, the synthesis of [C14mim][Br] is carried out in the laboratory, then the critical micelle concentration (CMC) of [C14mim][Br] is determined using conductivity measurements at temperatures 298.15 K, 308.15 K and 318.15 K in the absence and presence of (C2H5)4NBr at different concentrations 1 mM, 2 mM and 5 mM. The reduction in value of CMC is observed with respect to increasing concentration of (C2H5)4NBr and with the increase in temperature, the value of CMC also increases. These results are observed due to the establishment of reinforced hydrophobic interactions between the hydrophobic parts of surface active ionic liquid and the electrolytes. Then we reflected different thermodynamic parameters such as, standard free energy of micellization (ΔGm0), standard enthalpy of micellization (ΔHm0), and standard entropy of micellization (ΔSm0) in the temperature range 298.15 K–318.15 K, utilizing the value of CMC obtained from conductivity measurements. A graphical contrast of these thermodynamic parameters has been made. Further refractive index measurement and UV–visible spectroscopic study have been employed to verify the CMC obtained using conductivity measurement, which is found to be very close to that obtained via conductivity study. The alterations produced in the respective system have been confirmed via FT-IR spectroscopic study, which signify the variations produced by electrolyte on the aggregation of surface active ionic liquid in aqueous media.
The effect of imidazolium salts with amino acids as counterions on the reactivity of 4-nitrophenyl acetate: A kinetic study
Figueroa, Roberto,Orth, Elisa,Pavez, Paulina,Rojas, Mabel,Santos, José G.
, (2020/04/29)
As a first approach to improve the “green character” of the surfactants based on imidazolium cations, three surfactants using 1-tetradecyl-3-methylimidazolium [C14mim]+ as cation and different amino acids (AA) as counterion, were syn
