A new fluorescent method was developed based on the ulifloxacin-europium (III)-sodium dodecylbenzene sulfonate system for the determination of ulifloxacin, the active metabolite of prulifloxacin. Sodium dodecylbenzene sulfonate formed a ternary complex with ulifloxacin-europium (III) and significantly enhaneed the characteristic fluorescence of europium (III). The enhanced fluorescence intensit...

The adsorption, micelle formation, and salting out of sodium dodecyl sulfate in the presence of sodium chloride were studied from the viewpoint of their mixed adsorption and aggregate formation. The surface tension of aqueous solutions of a sodium chloride-sodium dodecyl sulfate mixture was measured as a function of the total molality and composition of the mixture. Phase diagrams of adsorption...

In the crystal structure of the title molecular salt, C(8)H(12)N(+)·C(7)H(7)O(3)S(-), the 4-ethyl-anilinium cations and 4-methyl-benzene-sulfonate anions are linked into chains parallel to the b axis by inter-molecular N-H⋯O hydrogen bonds.

In the title salt, C(11)H(21)N(2) (+)·C(6)H(5)O(3)S(-), which has two cation-anion pairs in the asymmetric unit, the two imidazolium cations are linked to two separate acceptor O atoms of one of the benzene-sulfonate anions through aromatic C-H⋯O hydrogen bonds, while the second anion is unassociated.

The asymmetric unit of the title compound, C(5)H(12)N(+)·C(7)H(5)O(6)S(-)·H(2)O, contains a piperidinium cation, one 3-carb-oxy-4-hydroxy-benzene-sulfonate anion and one water mol-ecule. Inter-molecular O-H⋯O, O-H⋯S and N-H⋯O hydrogen bonds generate a three-dimensional hydrogen-bonded framework.

The title compound, C(36)H(36)Br(2)O(3), was synthesized from (R(p))-4-bromo-12-hy-droxy[2.2]paracyclo-phane and oxydiethane-2,1-diyl bis-(4-methyl-benzene-sulfonate). The crystal packing exhibits a short O⋯Br inter-action [Br⋯O = 3.185 (3) Å] and a weak inter-molecular C-H⋯O contact.

In the crystal structure of the title salt, C(17)H(24)NO(+)·C(7)H(7)O(3)S(-), the N-(2-hy-droxy-benz-yl)adamantan-1-aminium cations and 4-methyl-benzene-sulfonate anions are linked by O-H⋯O and N-H⋯O hydrogen bonds. C-H⋯π inter-actions are also observed between the cation and the anion.