Effect of linking groups and hydrophobic groups on properties of sulfate Gemini surfactants

Gu, Yue; Zhou, Ming; Tu, Hongjun

doi:10.1016/j.molliq.2022.120346

Cited by 14 publications

(7 citation statements)

References 36 publications

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“…The emulsifying activity is one of the most considerable parameters in the study of surfactants. – Figure illustrates the time required to separate 10 mL of water from the emulsion formed between surfactant aqueous solution and benzene/α-pinene. It is known that the longer the time is, the better is the emulsifying power of the measured surfactant .…”

Section: Resultsmentioning

confidence: 99%

Highly Effective and Broad-Spectrum Antimicrobial Quaternary Ammonium Salts Containing Camphene Structure: Preparation, Surface-Active Properties, and Bioassay

Huang,

Huo,

et al. 2023

ACS Omega

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A series of novel quaternary ammonium salts (QASs) (4a–4n) comprising a camphene moiety were synthesized for the first time. Fourteen examples were prepared from camphene through Prins reaction, halogenation, and quaternarization, successively. The structures of the synthesized QASs were analyzed by Fourier transform infrared spectroscopy, 1H NMR, 13C NMR and high-resolution mass spectrometry. Surface-active properties, emulsifying abilities, and foaming properties of the investigated compounds were then studied. The antimicrobial activities of these QASs against Gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis), Gram-negative bacteria (Escherichia coli and Klebsiella pneumoniae), and fungi species (Candida albicans, Candida tropicalis, and Aspergillus niger) were determined by the microdilution method. The results showed that the chemical structural factors, including types of substitutes and alkyl chain length, might be correlated with the lipid–water partition coefficient (cLog P), which played a critical role in the antimicrobial process. Compounds with alkyl chain lengths (N) in the range of 10–14 were relatively more active, while compounds bearing pyridinium, benzyl, methylimidazolium groups, or varied alkyl chain lengths (N < 5 and N > 16) were almost inactive. Compound 4k possessing a dodecyl group exhibited the most effective and broad-spectrum antimicrobial activity against almost all tested bacteria and fungi with the minimal inhibitory concentration values ranging from 0.24 to 0.98 μg/mL.

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Section: Resultsmentioning

confidence: 99%

Highly Effective and Broad-Spectrum Antimicrobial Quaternary Ammonium Salts Containing Camphene Structure: Preparation, Surface-Active Properties, and Bioassay

Huang,

Huo,

et al. 2023

ACS Omega

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“…Meanwhile, the Kraft points have no relationship with a series of methylene linking groups. The Kraft point of the Gemini surfactant containing benzyl is 1°C higher than those containing methylene series, although the hydrophobic carbon chain is the same in both cases [52]. Usually, electrolytes raise the Kraft temperature, whereas there is no general trend for the dependence on counter ions.…”

Section: Temperaturementioning

confidence: 90%

Effect of Microheterogeneous Environments on Reaction Rate: Theoretical Explanation through Different Models

Kumar Mandal

2024

Surfactants - Fundamental Concepts and Emerging Perspectives

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Microheterogeneous systems (typically micelles and reverse micelle systems) refer to aggregate systems in which different structural shapes are formed by amphiphiles in water or other similar media. Amphiphilic molecules undergo a self-assembly process known as micellization through hydrophobic or H-bonding interactions. The Microenvironment consisting surfactants changes the physicochemical behavior of the system and can catalyze or inhibit reaction rates. In addition, thermodynamic parameters such as standard enthalpy of activation, standard entropy of activation, energy of activation etc. may vary in this environment. Thus, for last few decades, the enormous interest among the researchers in the study of the effect of microheterogeneous environments on reaction rate. It is also challenging how to fit experimental results with different models. Every model has its own significance and limitations.

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“…It should be noted that the MG uptakes over Cu-BTC@TpPa-1 composite is much better than those of pure Cu-BTC and TpPa-1, attributing to their synergistic interactions such as electrostatic, π-π complexation, and hydrogen bonding interactions, etc (Peng et al, 2018;Zhong et al, 2021). It was detected that the MG uptakes over Cu-BTC@TpPa-1 (12) was signi cantly increased compared with that of Cu-BTC and TpPa-1. However, when more TpPa-1 was incorporated into the support, it is possible that the pore cavities could become blocked, leading to an increase in diffusion resistance during the mass transfer process, which eventually could decrease the amount of accessible active sites to accommodate MG molecules.…”

Section: Adsorption Performance Mg Adsorption Isothermsmentioning

confidence: 94%

“…Figure 1 displayed the N 2 adsorption-desorption isotherms of Cu-BTC, TpPa-1, Cu-BTC@TpPa-1(12), Cu-BTC@TpPa-1( 24), and Cu-BTC@TpPa-1(36), and the pore volume and surface area and were obtained in Table S1. The isotherms shape of Cu-BTC, TpPa-1, Cu-BTC@TpPa-1 (12), and Cu-BTC@TpPa-1 (24) obviously exhibited type I with a slight hysteresis loop in the light of IUPAC require, which is microporous features (Tian et al, 2019). While the isotherm shape of Cu-BTC@TpPa-1(36) is between type I and IV.…”

Section: Materials Characterizationmentioning

confidence: 97%

Well-constructed a water stable Cu-BTC@TpPa-1 binary composite with excellent capture ability toward malachite green

Zou,

Li,

Dong

et al. 2023

Preprint

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The water instability of copper-based metal organic-framework (e.g. Cu-BTC) restricts its potential utilization, such as the elimination of hazardous malachite green (MG) from water. In present paper, we have developed a novel metal/covalent-organic frameworks (Cu-BTC@TpPa-1) binary composite by solvothermal method. This composite serves as a multifunctional platform for the effective removal of MG from water. This Cu-BTC@TpPa-1 obviously keeps structural integrity soaked in water for 7 days. And its heat resistant performance can achieve 360 oC because of the TpPa-1 protection, which is outdistance to that of Cu-BTC. The adsorbed capacity of MG over Cu-BTC@TpPa-1 is exceptionally high, with an uptake of up to 1024 mg/g, which is superior compared to previous adsorbents, highlighting its superior adsorption capabilities. The adsorptive performance was controlled by the associative effects of Cu-BTC and TpPa-1 with an association effects of π-complexation and electrostatic attraction. The Cu-BTC@TpPa-1 might be a prospective adsorbent for MG capture from industrial waste water.

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Effect of linking groups and hydrophobic groups on properties of sulfate Gemini surfactants

Cited by 14 publications

References 36 publications

Highly Effective and Broad-Spectrum Antimicrobial Quaternary Ammonium Salts Containing Camphene Structure: Preparation, Surface-Active Properties, and Bioassay

Highly Effective and Broad-Spectrum Antimicrobial Quaternary Ammonium Salts Containing Camphene Structure: Preparation, Surface-Active Properties, and Bioassay

Effect of Microheterogeneous Environments on Reaction Rate: Theoretical Explanation through Different Models

Well-constructed a water stable Cu-BTC@TpPa-1 binary composite with excellent capture ability toward malachite green

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