3270-73-3Relevant articles and documents
Micellization and Adsorption Properties of New Cationic Gemini Surfactants Having Hydroxyisopropyl Group
Asadov, Ziyafaddin H.,Ahmadova, Gulnara A.,Rahimov, Ravan A.,Hashimzade, Seyid-Zeynab F.,Ismailov, Etibar H.,Asadova, Nahida Z.,Suleymanova, Samira A.,Zubkov, Fedor I.,Mammadov, Ayaz M.,Agamaliyeva, Durna B.
, p. 952 - 962 (2019)
A series of cationic gemini surfactants, N,N′-bis(alkyl)-N,N′-bis(2-hydroxypropyl)ethylenediammonium dibromide, [CnH2n+1(CH3CH(OH)CH2)NH(CH2)2NH(CH2CH(OH)CH3)CnH2n+1]Br2 (where n is the tail chain length, n = 9, 12, and 14), referred to as CnC2Cn[iso-Pr(OH)] was synthesized. Via conductometric and tensiometric methods, at different temperatures (283 to 313 K), specific electrical conductivities and surface tensions of the aqueous solutions of these cationic gemini surfactants were determined. According to the obtained values, micellization and adsorption parameters such as critical micellization concentration (CMC), maximum surface excess (Δmax), minimal cross sectional surface area of surfactant polar group (Amin), adsorption efficiency (pC20), surface pressure (π), and binding degree of counterion (β) were calculated. The values of standard Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°) were also computed. Via the dynamic light scattering method, diameters of aggregates of the synthesized cationic gemini surfactants were determined in water. It was established that the diameters of these aggregates decrease with a temperature rise. Antibacterial properties of the synthesized cationic surfactants against sulfate-reducing bacteria (SRB) were studied.
Aggregation and antimicrobial properties of gemini surfactants with mono- and di-(2-hydroxypropyl)ammonium head-groups: Effect of the spacer length and computational studies
Asadov, Ziyafaddin H.,Ahmadova, Gulnara A.,Rahimov, Ravan A.,Hashimzade, Seyid-Zeynab F.,Abdullayev, Yusif,Ismailov, Etibar H.,Suleymanova, Samira A.,Asadova, Nahida Z.,Zubkov, Fedor I.,Autschbach, Jochen
, (2020/02/11)
Cationic gemini surfactants, alkanediyl-α,ω-bis[(2-hydroxypropyl)dodecylammonium] dibromide (abbreviated as C12-s-C12[iso-Pr(OH)] and C12-s-C12[iso-Pr(OH)]2, with s = 2, 3, 4 and 5) have been synthesized, and their aggregation properties in aqueous solution have been studied by surface tension, electrical conductivity and dynamic light scattering methods. On the basis of the results of studying aqueous solutions of the synthesized gemini surfactants by tensiometric and conductometric methods, their principal surfactivity parameters, such as the degree of counterion binding (β), critical micelle concentration (CMC), effectiveness of surface tension reduction (πCMC), surface excess concentration (Γmax), area per molecule at the interface (Amin), changes of Gibbs free energies of adsorption (ΔGad) and micellization (ΔGmic) have been calculated. For both classes of these gemini surfactants, a character of the surfactivity parameters change with an elongation of the spacer chain was defined and comparative analysis with other ammonium-type gemini surfactants having different head-groups was performed. Using dynamic light scattering method, regularities of variation of the aggregates sizes were studied depending on the number of 2-hydroxypropyl groups and the spacer chain length was investigated. Meanwhile, it was revealed that the mentioned gemini surfactants possess antimicrobial properties. The mechanism of the epoxide ring opening and salt formation reactions were calculated by using Kohn–Sham DFT with the B3LYP functional. The epoxide ring opening via primary (dodecylamine) and secondary (INT2) amines was determined as exergonic (13.4 and 4.4 kcal/mol) reactions as observed experimentally.
Synthesis of amphiphilic amino alcohols
Toom, Lauri,Villo, Piret,Liblikas, Ilme,Vares, Lauri
experimental part, p. 4295 - 4313 (2009/04/11)
An efficient and general approach for the synthesis of amphiphilic 1,2-amino alcohols is reported. The use of N-benzyl protecting groups is essential for obtaining good yields when opening a long-chain terminal epoxide with an amine. Copyright Taylor & Francis Group, LLC.
Hydrogels of quadrol methacrylate polymers
-
, (2008/06/13)
Acrylate and methacrylate monoesters and diesters having the following formula (I) STR1 wherein R1, R2, R3 are as defined in the specification, are disclosed. These monomers are polymerizable into hydrogel polymers which are extremely hydrophilic. These hydrogel polymers are useful in the preparation of wound dressings. These polymers form complexes with polyvalent metal ions such as Ca, Mg, Mn and Cu, and possess macrophage stimulating activity in addition to the useful properties possessed by other acrylate and methacrylate hydrogel polymers.
KINETICS AND REACTION MECHANISM OF PROPYLENE OXIDE WITH ETHYLENEDIAMINE
Plucinski, Janusz,Prystasz, Henryka
, p. 2201 - 2208 (2007/10/02)
Reaction rate constants were determined for propylene oxide addition to ethylenediamine resulting in successive substitution of all hydrogen atoms in amino groups.
