Contrasting effect of 1-butanol and 1, 4-butanediol on the triggered micellar self-assemblies of C16-type cationic surfactants

2021 ◽  
Author(s):  
Vinod Kumar ◽  
Rajni Verma ◽  
Dwarkesh Satodia ◽  
Debes Ray ◽  
Ketan Kuperkar ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Cationic Surfactant ◽  
Self Assembly ◽  
Cationic Surfactants ◽  
Alkyl Chain ◽  
Cetylpyridinium Bromide ◽  
Quaternary Salts ◽  
Head Groups ◽  
Contrasting Effect ◽  
Cetyltrimethylammonium Tosylate

Self-assembly in aqueous solutions of three quaternary salts based C16-type cationic surfactant with different polar head groups and identical carbon alkyl chain viz., cetylpyridinium bromide (CPB), cetyltrimethylammonium tosylate (CTAT), and...

Steric and Counterion Effects on Cationic Surfactant Self-Assembly into Micelles and Liquid Crystals

2003 ◽  
Vol 56 (10) ◽  
pp. 1065 ◽  
Author(s):  
Marta A. Cassidy ◽  
Gregory G. Warr
Keyword(s):  
Liquid Crystals ◽  
Cationic Surfactant ◽  
Group Size ◽  
Self Assembly ◽  
Cationic Surfactants ◽  
Head Group ◽  
Ion Flotation ◽  
Head Groups ◽  
Aggregate Morphology ◽  
Spherical Micelles

The roles of head-group size and counterion association on aggregate morphology in solution and lyotropic phases of cationic surfactants (tetradecyl trimethyl-, tetradecyl triethyl-, and tetradecyl tripropylammonium) are examined, using salicylate as a strongly binding counterion. Larger head groups are found to inhibit the formation of low-curvature structures such as bilayers, and salicylate binding excludes spherical micelles, so that both effects tend to favour locally cylindrical aggregates. Interfacial probes and ion flotation show that the binding of salicylate is reduced by increasing head-group size. In addition, a novel demixing is observed with features similar to lower consolute behaviour of other cationic surfactant systems.

scholarly journals Equilibrium, Kinetic, and Thermodynamic Studies of Anionic Dyes Adsorption on Corn Stalks Modified by Cetylpyridinium Bromide

2018 ◽  
Vol 3 (1) ◽  
pp. 4 ◽  
Author(s):  
Liudmyla Soldatkina ◽  
Marianna Zavrichko
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Cationic Surfactant ◽  
Kinetic Studies ◽  
Batch Adsorption ◽  
Cetylpyridinium Bromide ◽  
Anionic Dyes ◽  
Pseudo Second Order ◽  
Dyes Adsorption

Corn stalks (CS) were modified by a cationic surfactant, cetylpyridinium bromide (CPB), and used as an adsorbent (CS-CP) to remove anionic dyes [Acid Red (AR) and Acid Orange (AO)] from aqueous solutions. The FTIR analysis and the obtained calculations based on the determination of the adsorption capacity of CS towards CPB confirmed that the cationic surfactant had been adsorbed on the surface of corn stalks. Adsorption of the anionic dyes on modified corn stalks was investigated in a series of batch adsorption experiments at 303–328 K. The adsorption data were analyzed using Langmuir, Freundlich, and Temkin models. The Langmuir model was found to be more suitable for the experimental data of the anionic dyes on CS-CP than other adsorption models. Kinetic studies revealed that the pseudo-second order model showed the best fit to the experimental data. The thermodynamic parameters indicated that the adsorption process was spontaneous and exothermic. Mechanisms involving ion exchange and chemisorption might be responsible for the uptake of the anionic dyes on CS-CP. Obtained results imply that CS-CP could be applied as an effective adsorbent to remove anionic dyes from aqueous solutions.

Morphology Controlled Nanostructure of Zinc Porphyrin

2013 ◽  
Vol 562-565 ◽  
pp. 1314-1318
Author(s):  
Jun Jie Li ◽  
Chang Jun Hou ◽  
Zhi Fei Li ◽  
Huan Bao Fa ◽  
Mei Yang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Fluorescence Spectroscopy ◽  
Aqueous Solutions ◽  
Self Assembly ◽  
Cationic Surfactants ◽  
Zinc Porphyrin ◽  
Assembly Method ◽  
Fluorescent Spectra ◽  
Anionic And Cationic Surfactants ◽  
Surfactant Assisted

We have shown that various Zinc porphyrin-based nanostructures can be easily synthesized by a surfactant-assisted self-assembly method, where nonionic, anionic and cationic surfactants are employed. It was found that tuning the type of surfactant offered an alternative to promote the formation of Zinc porphyrin nanostructure with different morphologies in aqueous solutions. As-prepared nano-scale self-assemblies, including disc-shaped, ellipsoid, square and quadrangular pyramidal nanoparticles, were investigated in solution via UV/vis, fluorescence spectroscopy and SEM microscopy. The different UV/vis as well as fluorescent spectra between nano-porphyrin and its monomer further conformed that the nano-crystallization of porphyrin would result in novel optical properties differing from the single subunits.

scholarly journals Interaction of Dyes with Cationic Surfactants in Solutions: Determination of Critical Micelle Concentration

2019 ◽  
Vol 81 ◽  
pp. 27-34 ◽  
Author(s):  
Serghey Shapovalov ◽  
V. Ponomariov
Keyword(s):  
Aqueous Solution ◽  
Critical Micelle Concentration ◽  
Cationic Surfactant ◽  
Cationic Surfactants ◽  
Empirical Methods ◽  
Visible Spectroscopy ◽  
Cetylpyridinium Bromide ◽  
Sulforhodamine B ◽  
Semi Empirical

Interactions of sulforhodamine B or ethyl eosin (as the anionic dye) with cetylpyridinium bromide (as a cationic surfactant) have been investigated by visible spectroscopy in aqueous solution. The object of research is the association between an anion of dye and of cationic surfactant in aqueous solutions and its features. Computer simulation of these interactions was carried out with the use of AM1 and PM3 semi-empirical methods. A new spectrophotometric method was developed for determination of critical micelle concentration of cationic surfactants.

scholarly journals Cationic Surfactants: Self-Assembly, Structure-Activity Correlation and Their Biological Applications

2019 ◽  
Vol 20 (22) ◽  
pp. 5534 ◽  
Author(s):  
Zakharova ◽  
Pashirova ◽  
Doktorovova ◽  
Fernandes ◽  
Sanchez-Lopez ◽  
...  
Keyword(s):  
Self Assembly ◽  
Cationic Surfactants ◽  
Structural Diversity ◽  
Modern Trend ◽  
Biological Applications ◽  
Mixed Composition ◽  
Cleavable Surfactants ◽  
Amphiphilic Compounds ◽  
Head Groups ◽  
Main Emphasis

The development of biotechnological protocols based on cationic surfactants is a modern trend focusing on the fabrication of antimicrobial and bioimaging agents, supramolecular catalysts, stabilizers of nanoparticles, and especially drug and gene nanocarriers. The main emphasis given to the design of novel ecologically friendly and biocompatible cationic surfactants makes it possible to avoid the drawbacks of nanoformulations preventing their entry to clinical trials. To solve the problem of toxicity various ways are proposed, including the use of mixed composition with nontoxic nonionic surfactants and/or hydrotropic agents, design of amphiphilic compounds bearing natural or cleavable fragments. Essential advantages of cationic surfactants are the structural diversity of their head groups allowing of chemical modification and introduction of desirable moiety to answer the green chemistry criteria. The latter can be exemplified by the design of novel families of ecological friendly cleavable surfactants, with improved biodegradability, amphiphiles with natural fragments, and geminis with low aggregation threshold. Importantly, the development of amphiphilic nanocarriers for drug delivery allows understanding the correlation between the chemical structure of surfactants, their aggregation behavior, and their functional activity. This review focuses on several aspects related to the synthesis of innovative cationic surfactants and their broad biological applications including antimicrobial activity, solubilization of hydrophobic drugs, complexation with DNA, and catalytic effect toward important biochemical reaction.

scholarly journals The rheological characteristics for the mixtures of cationic surfactant and anionic–nonionic surfactants: the role of ethylene oxide moieties

RSC Advances ◽  
2017 ◽  
Vol 7 (22) ◽  
pp. 13032-13040 ◽  
Author(s):  
Liming Zhang ◽  
Wanli Kang ◽  
Derong Xu ◽  
Haishun Feng ◽  
Pengyi Zhang ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Cationic Surfactant ◽  
Self Assembly ◽  
Cationic Surfactants ◽  
Nonionic Surfactants ◽  
Rheological Characteristics

Ethylene oxide moieties in various numbers regulate the rheological characteristics of anionic–nonionic/cationic surfactants solutions by affecting the molecular self-assembly.

Effect of Addition of KX Type Electrolytes and Temperature on the Critical Micellar Concentrations of 1-Cetylpyridinium and Carbethopendecinium Bromides

1994 ◽  
Vol 59 (1) ◽  
pp. 99-105 ◽  
Author(s):  
Mária Vojteková ◽  
František Kopecký ◽  
Olga Greksáková ◽  
Jarmila Oremusová
Keyword(s):  
Aqueous Solutions ◽  
Temperature Dependence ◽  
Cationic Surfactants ◽  
Ion Selective Electrodes ◽  
Specific Interactions ◽  
Cetylpyridinium Bromide ◽  
Semiempirical Equation

The critical micellar concentrations (cmc) of the title cationic surfactants were measured in aqueous solutions at 25 °C in the presence of KBr, KF, KCl, KI, KSCN, KNO3, KAc and HCOOK. The conductometric and, in part, potentiometric methods employing ion selective electrodes were used. For 1-cetylpyridinium bromide in the absence of any of the electrolytes, the decreasing temperature dependence of cmc was measured conductometrically over the region of 12 - 40 °C and the association degree of the micelles with Br- anions was calculated. The decrease in cmc of the two surfactants due to the presence of electrolytes (in concentrations up to tenfold cmc) was expressed by means of a semiempirical equation. There are indications that I- and SCN- anions enter into specific interactions with micelles.

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