2534-65-8Relevant articles and documents
Micelle formation as a factor influencing the mode(s) of metal ion partitioning into: N -alkylpyridinium-based ionic liquids (ILs): Implications for the design of IL-based extraction systems
Wankowski, James L.,Kaul, Michael J.,Dietz, Mark L.
supporting information, p. 5674 - 5682 (2017/12/06)
Prior studies of metal ion partitioning between an acidic aqueous phase and an ionic liquid in the presence of a macrocyclic polyether have demonstrated that the overall partitioning is a composite of three distinct pathways: neutral complex/ion-pair extraction, exchange of a cationic metal-crown ether (CE) complex for the cationic constituent of the IL, and exchange of the metal ion for a hydronium ion in a CE-H3O+ complex formed during acid preconditioning of the IL. The obvious undesirability of the ion-exchange pathways, which can lead to substantial loss of the IL cation to the aqueous phase, has led to efforts to identify means by which these processes can be suppressed or eliminated. Prior work with N,N′-dialkylimidazolium and quaternary ammonium bis [(trifluoromethyl)sulfonyl]imides has shown that increasing the hydrophobicity of the IL cation can be an effective means of diminishing the contribution of ion-exchange. Work with the corresponding N-alkylpyridinium ILs, however, indicates that in certain instances, an increase in the hydrophobicity of the IL cation is accompanied by a marked increase in its propensity to self-associate, leading to the formation of micelles in the aqueous phase. The net effect is to diminish or even negate the expected beneficial effect of IL cation hydrophobicity in reducing the contribution of ion exchange to the overall metal ion partitioning process, adversely impacting the "greenness" of extraction processes employing these ILs.
PYRIDINIUM=BIS(FLUOROSULFONYL)IMIDE AND MANUFACTURING METHOD THEREOF
-
Paragraph 0033, (2018/10/31)
PROBLEM TO BE SOLVED: To provide novel pyridinium=bis(fluorosulfonyl)imide having an alkyl group having 9 to 12 carbon atoms or an aralkyl group having 7 to 13 carbon atoms at 1-position of pyridinium and a hydrogen atom or an alkyl group having 1 to 6 carbon atoms on a pyridine ring, capable of being used for an electrolyte, an antistatic agent and the like for electrical chemical devices such as cell, capacitor, condenser and solar cell. SOLUTION: There is provided pyridinium=bis(fluorosulfonyl)imide represented by the formula (1), where R1 represents an alkyl group having 9 to 12 carbon atoms or an aralkyl group having 7 to 13 carbon atoms, R2 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, excluding 1-nonyl pyridinium=bis(fluorosulfonyl)imide and 1-dodecyl-4-methyl pyridinium=bis(fluorosulfonyl)imide. COPYRIGHT: (C)2015,JPOandINPIT
Preparation of the pyridinium salts differing in the length of the N-alkyl substituent
Marek, Jan,Stodulka, Petr,Cabal, Jiri,Soukup, Ondrej,Pohanka, Miroslav,Korabecny, Jan,Musilek, Kamil,Kuca, Kamil
experimental part, p. 1967 - 1972 (2010/09/08)
Quaternary pyridinium salts with chains ranging from C8 to C20 belong in the large group of cationic surfactants. In this paper, the preparation of such cationic surface active agents based on the pyridinium moiety and differing in the length of the N-alkyl chain is described. Additionally, HPLC technique was established to distinguish each prepared pyridinium analogue. This study represents universal method for preparation and identification of quaternary pyridinium detergents.
