Relationships between the molecular structure and the critical micelle concentration (cmc) of anionic surfactants were investigated using a quantitative structure-property relationship approach. Measured cmc values for 119 anionic structures, representing sodium alkyl sulfates and sodium sulfonates with a wide variety of hydrophobic and hydrophilic structures, were considered. The best multiple...

Hexa-methyl-phospho-ramide (hmp), tetra-thio-tungstate, silver sulfide and cerium nitrate were self-assembled to form a one-dimensional anionic [Ag(4)W(4)S(16)](n) (4n-) chain in the title compound, {[Ce(NO(3))(2)(C(6)H(18)N(3)OP)(4)][AgWS(4)]}(n). The asymmetric unit contains four crystallographically independent [Ce(hmp)(4)(NO(3))(2)](+) cations, which leads to a one-dimensional polymeric ani...

aqueous polyurethane dispersions (puds) have recently emerged as important alternatives to their solvent-based counterparts for various applications due to increasing health and environmental awareness (green chemistry). anionic polyester-polyurethane dispersions were synthesized by three steps. in the first step, macromonomer diisocyanate having carboxylic acid was prepared by isophorone diiso...

A data set of 181 diverse anionic surfactants has been investigated to relate the logarithm of critical micelle concentration (cmc) to the molecular structure using Comprehensive Descriptors for Structural and Statistical Analysis (CODESSA Pro) software. A fragment approach provided superior quantitative structure-property relationship (QSPR) models in terms of statistical characteristics and p...

A two-dimensional columnar phase in mixtures of DNA complexed with cationic liposomes has been found in the lipid composition regime known to be significantly more efficient at transfecting mammalian cells in culture compared to the lamellar (LalphaC) structure of cationic liposome-DNA complexes. The structure, derived from synchrotron x-ray diffraction, consists of DNA coated by cationic lipid...

This work demonstrates a novel method for the synthesis of large pore mesoporous silica nanoparticles (MSNs) with a pore diameter of 10.3 nm and a particle diameter of ∼50 nm based on the incorporation of mixed anionic surfactants sodium dodecyl benzene sulfonate (SDBS) and sodium dodecyl sulphate (SDS) as the template in the synthesis process. The dispersity, morphology, pore structure and siz...

use of wastewater treatment methods in aquaculture is one of the main ways for decreasing the environmental effects of this industry and applies the best management practices (bmps). anionic compounds are the main pollutants in recirculation aquaculture systems. ion exchangers such as clays are vastly applied in waste water industry but in aquaculture systems at yet there isn't any report ...