Some solution properties of certain surface-active n-alkylpyridinium halides

Butler, C. G.; Stead, J.A; Taylor, Henry L.

doi:10.1016/0021-9797(69)90418-4

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…It is known that in organic solvents and also in aqueous solutions, the interaction between asymmetric tetraalkylammonium ions, such as methyltridodecylammonium with anions such as Cl - and Br - , is stronger than that between symmetrical quaternary ammonium and anions. − Significant ion pairing is also known to occur between heterocyclic ammonium ions and Cl - or Br - . − We can therefore expect stronger ion pairing when the cation constituting an RTIL is asymmetric (e.g., tetraalkylammonium ions having different alkyl chain lengths and heterocyclic ammonium ions at the RTIL|W interface). In fact, 1-methyl-3-octylimidazolium (C 8 mim + ) specifically adsorbs at the interface between 1-methyl-3-octylimidazolium bis(pentafluoroethylsulfonyl)imide ([C 8 mim + ][C 2 C 2 N - ]) and an aqueous solution of LiCl .…”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7] Significant ion pairing is also known to occur between heterocyclic ammonium ions and Clor Br -. [8][9][10][11][12] We can therefore expect stronger ion pairing when the cation constituting an RTIL is asymmetric (e.g., tetraalkylammonium ions having different alkyl chain lengths and heterocyclic ammonium ions at the RTIL|W interface). In fact, 1-methyl-3-octylimidazolium (C 8 mim + ) specifically adsorbs at the interface between 1-methyl-3-octylimidazolium bis-…”

Section: Introductionmentioning

confidence: 99%

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Interfacial Ion Pairing at the Interface between Water and a Room-Temperature Ionic Liquid, N-Tetradecylisoquinolinium Bis(pentafluoroethylsulfonyl)imide

2007

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The specific interaction of N-tetradecylisoquinolinium (C(14)Iq+) with Cl- and Br- has been detected in the voltammetry of ion transfer and electrocapillarity at the interface between an aqueous solution (W) and a room-temperature ionic liquid (RTIL), N-tetradecylisoquinolinium bis(pentafluoroethylsulfonyl)imide ([C(14)Iq+][C(2)C(2)N-]). This specific interaction also makes the transfer of Cl- and Br- into [C(14)Iq+][C(2)C(2)N-] energetically more favorable in comparison with that of F- and SO(4)(2-). The width of the polarized potential window in ion-transfer voltammetry at the [C(14)Iq+][C(2)C(2)N-]|W interface is significantly narrower because of the transfer of anions from W to RTIL. The degree of affinity of the anion with C(14)Iq+ agrees with the Hofmeister series. Such an ion-pair formation of anions in W with cations in the RTIL is much weaker when the cation constituting the RTIL is a symmetric tetraheptylammonium ion.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interfacial Ion Pairing at the Interface between Water and a Room-Temperature Ionic Liquid, N-Tetradecylisoquinolinium Bis(pentafluoroethylsulfonyl)imide

2007

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“…The latter is postulated as arising from the occurrence of "water-cages" stabilized by the hydrocarbon chain, the degree of structured water decreasing with temperature increase. Butler, Stead & Taylor (1969) consider the observed minimum value of the CMC to be an artifact. In systems in which dimers have been detected in co-existence with monomers, the use of the monomer concentration only in the calculation of CMC values removes the conventional minimum value.…”

Section: R E S U L T S a N D Discussionmentioning

confidence: 99%

The effects of temperature on the critical micelle concentrations of alkyl α-picolinium bromides

Adderson

Taylor

1970

Journal of Pharmacy and Pharmacology

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The temperature dependence of the critical micelle concentrations of decyl, dodecyl and tetradecyl a-picolinium bromides has been determined by measurement of conductance. Constants for the equation relating log. CMC and alkyl chain length have been calculated for the temperature range 5" to 70", in increments of 5". An estimate of the effect of temperature upon the degree of counterion binding is recorded. Thermodynamic parameters have been calculated using the uncharged phase-separation model and a theoretical interpretation of the process of micellization given.

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Synthesis and Characterization of Highly Fluorinated Gemini Pyridinium Surfactants

Quagliotto¹,

Barolo²,

Barbero³

et al. 2009

Eur J Org Chem

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A series of fluorinated gemini pyridinium amphiphiles have been prepared, purified and fully characterized. The synthesis was performed using alkyl trifluoromethanesulfonates as the quaternizing agents, provided very good yields and overcame problems arising with other less powerful alkylating agents. The use of different characterization techniques, such as conductivity and surface tension measurements, shed

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Some solution properties of certain surface-active n-alkylpyridinium halides

Cited by 5 publications

References 23 publications

Interfacial Ion Pairing at the Interface between Water and a Room-Temperature Ionic Liquid, N-Tetradecylisoquinolinium Bis(pentafluoroethylsulfonyl)imide

Interfacial Ion Pairing at the Interface between Water and a Room-Temperature Ionic Liquid, N-Tetradecylisoquinolinium Bis(pentafluoroethylsulfonyl)imide

The effects of temperature on the critical micelle concentrations of alkyl α-picolinium bromides

Synthesis and Characterization of Highly Fluorinated Gemini Pyridinium Surfactants

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