52132-58-8Relevant academic research and scientific papers
Novel synthesized Schiff Base-based cationic gemini surfactants: Electrochemical investigation, theoretical modeling and applicability as biodegradable inhibitors for mild steel against acidic corrosion
Abd El-Lateef, Hany M.,Soliman, Kamal A.,Tantawy, Ahmed H.
, p. 478 - 498 (2017)
Three novel Schiff base compounds were synthesized and characterized using spectroscopic methods (FT-IR, 1H NMR and 13C NMR). Their critical micelle concentrations were determined by conductimetric and surface tension measurements. The inhibition potentials of the prepared surfactants on mild steel corrosion in H2SO4 have been investigated using electrochemical and scanning electron microscopy techniques. The results showed that all surfactants are good inhibitors for mild steel corrosion with the percentage inhibition efficiency of up to 99.21% at 1.0?mM. The data showed that the studied surfactants are mixed-type inhibitors. Adsorption of the inhibitors obeyed the Langmuir isotherm. The results obtained from theoretical calculations support our experimental studies.
Synthesis and evaluation of novel cationic gemini surfactants based on Guava crude fat as petroleum-collecting and dispersing agents
Abo-Riya, Mohammed,Tantawy, Ahmed H.,El-Dougdoug, Wagdy
, p. 642 - 650 (2016)
Cationic gemini surfactants based on Guava fat mixed fatty alcohols and isolated fatty alcohols C8, C12, C16, C18 were synthesized. The surface properties and thermodynamic parameters of micellization process, of the new cationic gemini surfactants have been investigated. Furthermore, the petroleum-collecting and dispersing indices of obtained surfactants, in waters of varying salinity have been studied. The results revealed that the tendency of these surfactants toward adsorption process was more than its tendency micellization and show high petroleum-collecting and dispersing properties.
Synthesis and evaluation of novel series of Schiff base cationic surfactants as corrosion inhibitors for carbon steel in acidic/chloride media: Experimental and theoretical investigations
Abd El-Lateef, Hany M.,Tantawy, Ahmed H.
, p. 8681 - 8700 (2016/02/05)
A new family of Schiff base cationic surfactants (CSSB) having various alkyl chain lengths were prepared and their chemical structure was elucidated by using different spectroscopic techniques (FTIR, 13C-NMR and 1H-NMR). The surface activity parameters of the prepared surfactants were measured to set the adsorption and micellization characteristics at the water/air interface. The corrosion inhibition capability of these surfactants was investigated on a carbon steel surface in 3.5% NaCl+ 0.5 M HCl solutions at different temperatures (30-60 °C) by potentiodynamic polarization and electrochemical impedance spectroscopy measurements. The results revealed that CSSB compounds inhibited corrosion of carbon steel in the investigated acidic chloride containing environment. It was found that the inhibition efficiency increases with an increase in inhibitor concentrations and decreases with increasing temperature. Polarization data indicated that the investigated compounds act as mixed-type inhibitors, and the adsorption isotherm basically obeys the Langmuir isotherm. The corrosion inhibition mechanism was discussed based on the potential of zero charge value. An SEM/EDX studies confirmed that CSSB inhibitors could form films by adsorption on the carbon steel surface. The theoretical predictions exhibit good agreement with empirical results.
Synthesis of ester based cationic pyridinium gemini surfactants and appraisal of their surface active properties
Patial, Pankaj,Shaheen, Arifa,Ahmad, Ishtiaque
, p. 49 - 56 (2013/03/13)
New pyridinium gemini surfactants have been synthesized by esterification of halogenated carboxylic acids with long chain fatty alcohols furnishing respective esters (dodecyl-2-chloroacetate, tetradecyl-2-chloroacetate, hexadecyl-2-chloroacetate, dodecyl-2-bromoacetate, tetradecyl-2-bromoacetate and hexadecyl-2-bromoacetate) followed by their subsequent treatment with 4,4′-trimethylene dipyridine resulting in the formation of title Gemini surfactants: 4,4′-(propane-1,3-diyl)bis1-{2-(dodecyloxy)-2-oxoethyl}; 4,4′-(propane-1,3-diyl)bis{1-(2-(tetradecyloxy)-2-oxoethyl}; 4,4′-(propane-1,3-diyl)bis{1-(2-(hexadecyloxy)-2-oxoethyl} dipyridinium chlorides; 4,4′-(propane-1,3-diyl)bis{1-(2-(dodecyloxy)-2-oxoethyl}; 4,4′-(propane-1,3-diyl)bis{1-(2-(tetradecyloxy)-2-oxoethyl} and 4,4′-(propane-1,3-diyl)bis{1-(2-(hexadecyloxy)-2-oxoethyl} dipyridinium bromides. Their identifications are based on IR, 1H-NMR, 13C-NMR, DEPT, COSY and Mass spectral studies. Their surface active properties were also evaluated on the basis of surface tension and conductivity measurements.
Synthesis and surface active properties of gemini cationic surfactants and interaction with anionic azo dye (AR52)
Abdel-Salam, Fatma H.,El-Said, Asrar G.
experimental part, p. 371 - 379 (2012/07/14)
A homologous series of new gemini cationic surfactants were synthesized and characterized using micro elemental analysis, FTIR, 1H-NMR and mass spectra. The surface activities of these amphiphiles were determined based on the data of surface tension. Critical micelle concentration, effectiveness of the surface tension reduction, efficiency of adsorption, maximum surface excess, minimum surface area and critical packing parameter were evaluated. The effect of cationic micelles on solubilization of anionic azo dye, sulforhodamine B (Acid Red 52) in aqueous micellar solution of the synthesized gemini cationic surfactants was studied at pH 6.9 ± 0.5 and 25°C. The results showed that the solubility of dye rose with increasing surfactant concentration as a consequence of some association between the dye and the micelles. It was also observed that the aggregation of surfactant and dye takes place at a surfactant concentration below the CMC of the individual surfactant. The partition coefficients between the bulk water and surfactant micelles as well as the Gibbs energies of distribution of dye between the bulk water and surfactant micelles were calculated using a pseudo-phase model. The effect of the hydrophobic chain length of Gemini cationic surfactants on the distribution parameters was also reported. The results show favorable solubilization of dye in cationic micelles. AOCS 2011.
Soft antimicrobial agents: Synthesis and activity of labile environmentally friendly long chain quaternary ammonium compounds
Thorsteinsson, Thorsteinn,Másson, Már,Kristinsson, Karl G.,Hjálmarsdóttir, Martha A.,Hilmarsson, Hilmar,Loftsson, Thorsteinn
, p. 4173 - 4181 (2007/10/03)
A series of soft quaternary ammonium antimicrobial agents, which are analogues to currently used quaternary ammonium preservatives such as cetyl pyridinium chloride and benzalkonium chloride, were synthesized. These soft analogues consist of long alkyl chain connected to a polar headgroup via chemically labile spacer group. They are characterized by facile nonenzymatic and enzymatic degradation to form their original nontoxic building blocks. However, their chemical stability has to be adequate in order for them to have antimicrobial effects. Stability studies and antibacterial and antiviral activity measurements revealed relationship between activity, lipophilicity, and stability. Their minimum inhibitory concentration (MIC) was as low as 1 μg/mL, and their viral reduction was in some cases greater than 6.7 log. The structure-activity studies demonstrate that the bioactive compounds (i.e., MIC for Gram-positive bacteria of 10μg/mL) have an alkyl chain length between 12 and 18 carbon atoms, with a polar headgroup preferably of a small quaternary ammonium group, and their acquired inactivation half-life must be greater than 3 h at 60 °C.
Synthesis and spreading behaviour of some reactive derivatives of long-chain alcohols and carboxylic acids
Holden, David A.
, p. 574 - 579 (2007/10/02)
Procedures are described for the synthesis of several azides, diimides, and azodiformates from long-chain alcohols and fatty acids.These reactive compounds have potential applications as thermal and photochemical curing agents, and as surface modifying agents for the preparation of filled plastics and chromatographic packings.The surface activity of the compounds was characterized by investigations of their spreading behaviour in monolayers on water.Unlike the single-chain azides and azo compounds, which give well-defined monolayers at all temperatures, monolayers of diacyl diimides and dialkyl azodiformates with two long-chain substituents are unstable with respect to collapse to the bulk solid.The photoreaction of monolayers of octadecanoyl azide to give a mixture of products derived from an intermediate isocyanate was demonstrated by ir and mass spectrometry.
