Dinonylnaphthalene sulfonate

Other commercial naphthalene-based sulfonic acids, such as dinonylnaphthalene sulfonic acid, are used as phase-transfer catalysts and acid reaction catalysts in organic solvents (71). Dinonylnaphthalene sulfonic acid is an example of a water-insoluble synthetic sulfonic acid. 

Fig. 12a and b. Transport of amino acids through a toluene barrier a from basic to acid aqueous phases using a positively charged carrier (N +, tricaprylylmethylammonium chloride, Aliquat 336) b from acid to basic aqueous phases using a negatively charged carrier (DNNS ", dinonylnaphthalene-sulfonate). (Cited from Ref.70))... 

Fig. 2. Concentration dependence of apparent aggregation number of dinonylnaphthalene sulfonates (o) = NaDNNS, ( ) = Ba(DNNS)2 in benzene at 25 °C. Concentration in formula weight (F. W.) per liter (L.) [J. Colloid Sci. 10, 139 (1955)1...

Fig. 6. g-micelle volumes ( aggregation numbers = acid residues per aggregate) in ml as determined by fluorescence depolarization measurements versus sulfonate concentration in g-equiva-lents per liter of dinonylnaphthalene sulfonates at 25 °C in benzene saturated with water [J. Colloid Sci. 12, 465 (1957)]... 

Fig. 14. Aggregation number (n) of sodium dinonylnaphthalene sulfonate versus solubility parameter of the solvents. (J. Phys. Chem. 68, 3453 (1964)1...

A comprehensive paper by Little and Singleterry134 was devoted to the solubility of alkali dinonylnaphthalene sulfonates in different solvents with particular emphasis on the mutual relation between the solubility parameter and micellar size, see Fig. 14. 

The solubility parameter introduced by Hildebrand90, rather than the dielectric constant or dipole moment is a characteristic quantity of the solvent which appears appropriate (if no specific solvation effects have to be taken into account) to forecast the micellar solubility of the alkali dinonylnaphthalene sulfonates in the particular solvent. As the solubility parameter of the solvent is increased, the micelles tend to assume a smaller size (Fig. 14). This size reduction gives a looser packing of the DNNS tails and, thus, exposes the more interactive aromatic and polar parts in such a way as to reduce the difference between the solubility parameter of the solvent and the effective solubility parameter of the solvent-accessible portions of the lipophilic micelle. The automatic matching of the solubility parameter for micelle and solvent by reduction of micelle size and packing in solvents of high solubility parameters recalls the behavior of linear macromolecules in solvents of different solvent power. 

In particular, Fig. 14 shows that the sodium dinonylnaphthalenesulfonate aggregates decrease in size approximately linearly with increasing solubility parameters between 6.5 and 10. According to Little135 the barium dinonylnaphthalene sulfonate (which forms spherical micelles independent of concentration) also obeys a linear relation between micelle size and the solubility parameters (see Fig. 15). Actually, quite a number of authors recommend this relationship, for example117,118,124 142 as the most reliable and appropriate one. It should be noted,... 

Also Fryar and Kaufman8 studied the solvent effect on the stability of barium dinonylnaphthalene sulfonate in toluene, toluene/methanol, and methanol solutions by ultracentrifugation and viscometry. The aggregation number of the micelles reduced from about 10 in toluene to about 4 when the mole fraction of free methanol in the solvent mixture was approximately 0.03. In pure methanol BaDNNS micelles did not exist. 

Soldatov, V., Oedberg, L., Hogfeldt, E. Infrared and NMR studies of lithium and cesium salts of dinonylnaphthalene sulfonic acid in heptane. In Ion exchange and membranes. 

CDNSA is dinonylnaphthalene sulfonic acid. dDB16C5AA is dibenzo-16-crown-5-oxyacetic acid. 

Dinonylnaphthalene Sulfonate. Solutions of this liquid cation exchanger in heptane were prepared and standardized as described elsewhere (9). 

The use of ion-selective electrodes as a rapid, inexpensive method for the determination of diltiazem has been explored. Detection limits of 10 5 M or lower are attainable. The potentio-metric sensor is based on the incorporation of dinonylnaphthalene sulfonic acid and diltiazem into a plasticized membrane resulting in a coated-wire ion-selective electrode (25). 

Ca dinonylnaphthalene sulfonate Ditolylphosphoric acid Dilauryl phosphoric acid Paratone 460 (contains carboxyl acid)... 

Barium bis(dinonylnaphthalenesulphonate) Barium di-nonylnaphthalenesulfonate Dinonylnaphthalene sulfonic acid barium salt EINECS 247-132-7 Naphtha-lenesuHbnic acid, dinonyl-, barium salt NSC 49580... 

Bis(2-ethylhexyl) sebacate containing 1% of sodium dinonylnaphthalene sulfonate... 

E3q)erimental nonspreading oil containing 97.75% bis(2-ethylhexyl)sebacate, 1.0% barium dinonylnaphthalene sulfonate, 1.0% fluoroester II, and 0.25% phenolic oxidation inhibitor. 

Soap Adsorbates. The barium salt of dinonylnaphthalene sulfonic acid, Ba(DNNS)2, was prepared by metathesis of the sodium salt with barium chloride [3]. 

The similarity between the spreading behavior of impure squalane on clean stainless steel and on steel coated with a monolayer of barium dinonylnaphthalene sulfonate provides further support for the explanation of spreading offered here. The surface energy of the monolayer-coated steel is only a fraction of that for the clean oxide-coated surface, but the monolayer s critical surface tension for spreading, 29 dynes per cm., is above the surface tension of the squalane. Consequently... 

Dinonylnaphthalene sulfonate and other organic. Hydrophobic anions... 

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