Journal of Molecular Liquids最新文献

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Particle-stabilized foams with fatty acid salts as stabilizers triggered by transition metal ions 由过渡金属离子引发的以脂肪酸盐为稳定剂的颗粒稳定泡沫
IF 5.3 2区 化学
Journal of Molecular Liquids Pub Date : 2024-11-22 DOI: 10.1016/j.molliq.2024.126538
Yuzheng Jiang, Xiaoqian Jiang, Liya Zhang, Aixin Song, Hongguo Liu, Dejun Sun
{"title":"Particle-stabilized foams with fatty acid salts as stabilizers triggered by transition metal ions","authors":"Yuzheng Jiang,&nbsp;Xiaoqian Jiang,&nbsp;Liya Zhang,&nbsp;Aixin Song,&nbsp;Hongguo Liu,&nbsp;Dejun Sun","doi":"10.1016/j.molliq.2024.126538","DOIUrl":"10.1016/j.molliq.2024.126538","url":null,"abstract":"<div><div>Particle-stabilized foams have been becoming the focus on foaming field because of their excellent stability due to the high stiffness of interface membrane. However, the modification of particle surfaces to reach an appropriate wettability needs complicated process, resulting in accompanied inconvenient foaming-defoaming regulation. In this work, we reported a series of foams stabilized by insoluble particles generated from fatty acid anions with metal ions. Different hydrocarbon chains endowed the formed particles diverse wettability and different aggregation behaviors at the gas–liquid interface, e.g., different foamability and the formation of the “dry water”. The foams exhibited ultra-stable properties and were responsive to environmental acidity, thus possessing a smart foaming-defoaming transition tuned by pH. The combination ability of fatty acid anions with metal ions changed with the chain-length and the nature of metal ions, leading to a choice for the extraction or separation of some metal ions in a fast and simple way. This new aggregation behavior of fatty acid salts can be explored to expand the practical applications.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126538"},"PeriodicalIF":5.3,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A fluorescent magnetic nanocrystalline cellulose nanosensor based on rhodamine B for Fe3+ ion detection 基于罗丹明 B 的用于检测 Fe3+ 离子的荧光磁性纳米晶纤维素纳米传感器
IF 5.3 2区 化学
Journal of Molecular Liquids Pub Date : 2024-11-21 DOI: 10.1016/j.molliq.2024.126536
Hura Alihemmati , Amirhossein Enayati-Gerdroodbar , Marzieh Golshan , Mehdi Salami-Kalajahi
{"title":"A fluorescent magnetic nanocrystalline cellulose nanosensor based on rhodamine B for Fe3+ ion detection","authors":"Hura Alihemmati ,&nbsp;Amirhossein Enayati-Gerdroodbar ,&nbsp;Marzieh Golshan ,&nbsp;Mehdi Salami-Kalajahi","doi":"10.1016/j.molliq.2024.126536","DOIUrl":"10.1016/j.molliq.2024.126536","url":null,"abstract":"<div><div>This research introduces a nanosensor specifically designed for the detection of Fe<sup>3+</sup> ions in aqueous solutions. The sensor is created using magnetic nanoparticles that have been functionalized with rhodamine B (RB). The <em>Z-</em>average particle size was 235.8, 287.3, and 121.6 for NCC, NCC@Fe<sub>3</sub>O<sub>4</sub>, and NCC@Fe<sub>3</sub>O<sub>4</sub>@RB indicating successful mitigation of magnetic aggregation by NCC and RB. The resulting structure, NCC@Fe<sub>3</sub>O<sub>4</sub>@RB, acts as a fluorescent probe that emits strong fluorescence under ultraviolet light, demonstrating its potential as an efficient tool for Fe<sup>3+</sup> ion detection in water. The NCC@Fe<sub>3</sub>O<sub>4</sub>@RB fluorescent probe had a limit of detection (LOD) of 1 × 10<sup>−5</sup> M, with linearity at concentrations of 1 × 10<sup>−4</sup>–5 × 10<sup>−3</sup> M. Upon introduction of iron ions to a solution containing NCC@Fe<sub>3</sub>O<sub>4</sub>@RB, they form complexes by binding with the weak-field ligands (such as nitrogen and oxygen) present within the structure of NCC@Fe<sub>3</sub>O<sub>4</sub>@RB. This interaction involves a high-spin coordination process, leading to the self-assembly of Fe<sup>3+</sup> ions on the surface of NCC@Fe<sub>3</sub>O<sub>4</sub>@RB. The magnetization saturation (Ms) for NCC@Fe<sub>3</sub>O<sub>4</sub>, NCC@Fe<sub>3</sub>O<sub>4</sub>@NH<sub>2</sub>, and NCC@Fe<sub>3</sub>O<sub>4</sub>@RB was measured 44.7, 43.1, and 40.5 emu/g, respectively. As a result, single electrons are generated, which leads to increased paramagnetism, ultimately quenching the fluorescence. This fluorescence quenching effect caused by Fe<sup>3+</sup> ions make the NCC@Fe<sub>3</sub>O<sub>4</sub>@RB fluorescent probe an efficient detector of Fe<sup>3+</sup> ions in water. The main benefit of this fluorescence quenching mechanism lies in its ability to specifically target Fe<sup>3+</sup> ions, without being influenced by the presence of other metal ions. This specificity guarantees that fluorescent probes utilizing magnetic fluorescence nanoparticles are highly efficient in detecting iron ions in water-based solutions, making them a valuable tool for environmental and biological purposes.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"416 ","pages":"Article 126536"},"PeriodicalIF":5.3,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation and evaluation of alizarin loaded liposomes for improved antibiofilm activities 制备和评估负载茜素的脂质体以提高抗生物膜活性
IF 5.3 2区 化学
Journal of Molecular Liquids Pub Date : 2024-11-21 DOI: 10.1016/j.molliq.2024.126545
Devaraj Bharathi, Jin-Hyung Lee, Jintae Lee
{"title":"Preparation and evaluation of alizarin loaded liposomes for improved antibiofilm activities","authors":"Devaraj Bharathi,&nbsp;Jin-Hyung Lee,&nbsp;Jintae Lee","doi":"10.1016/j.molliq.2024.126545","DOIUrl":"10.1016/j.molliq.2024.126545","url":null,"abstract":"<div><div>Biofilm-associated infections have a significant challenge in healthcare sectors due to their inherent resistance to conventional antimicrobial therapies. In this study, we examined the potential of alizarin-loaded liposomes as a new approach to combat biofilm formation by <em>Staphylococcus aureus</em> and <em>Candida albicans</em>. The liposomes were prepared via an emulsification method using soy lecithin and alizarin as the key components. The physico-chemical properties of the most potent alizarin loaded liposomal formulation were characterized using a Fourier transform nuclear magnetic resonance spectroscopy (FT-NMR), transmission electron microscopy (TEM), Dynamic light scattering (DLS) and zeta potential measurements, and Fourier transform infrared spectroscopy (FTIR). Microscopic examination of the effective liposome demonstrated the development of a unilamellar liposomal structure, measuring the mean DLS apparent diameter of 740.3 nm, with a corresponding zeta value of −28.6 mV. Liposomal formulation 3 loaded with alizarin (5 µg/mL) demonstrated 92.6 % antibiofilm against <em>S. aureus</em>, 96.3 % for <em>C. albicans</em> and 91.5 % for its dual biofilms. Moreover, the occurrence of single and dual biofilms on plates was diminished, as evidenced by observations from scanning electron microscopy analyses. Moreover, membrane analysis showed that liposomes neutralized <em>S. aureus</em> surface charge and reduced <em>C. albicans</em> hyphae production. In conclusion, our findings highlight the promising potential of alizarin-loaded liposomes as an enhanced therapeutic strategy for combating biofilm-associated infections caused by <em>S. aureus</em>, <em>C. albicans</em> and also their dual biofilms.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126545"},"PeriodicalIF":5.3,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Novel chromium (III) complex impregnated silica-gel nanoparticles for efficient removal of organic pollutants from wastewater 新型铬(III)络合物浸渍硅胶纳米粒子用于高效去除废水中的有机污染物
IF 5.3 2区 化学
Journal of Molecular Liquids Pub Date : 2024-11-21 DOI: 10.1016/j.molliq.2024.126535
Neda’a Al-Adaileh , Mohammed A. Al-Anber , Suresh Sagadevan , Imad Hamadneh , Fedaa Adaileh , Is Fatimah , Mohd Rafie Johan
{"title":"Novel chromium (III) complex impregnated silica-gel nanoparticles for efficient removal of organic pollutants from wastewater","authors":"Neda’a Al-Adaileh ,&nbsp;Mohammed A. Al-Anber ,&nbsp;Suresh Sagadevan ,&nbsp;Imad Hamadneh ,&nbsp;Fedaa Adaileh ,&nbsp;Is Fatimah ,&nbsp;Mohd Rafie Johan","doi":"10.1016/j.molliq.2024.126535","DOIUrl":"10.1016/j.molliq.2024.126535","url":null,"abstract":"<div><div>This study presents a novel silica gel-encapsulated chromium (III) complex, denoted as SG-[Cr(tta)<sub>3</sub>] has been synthesized via a sol–gel method. The complex [Cr(tta)<sub>3</sub>], where H-tta represents the 2-thenoynltrifluoroacetone ligand, has been successfully incorporated into the silica gel matrix. The physicochemical characterization, including FTIR, Raman, and XRD analyses, confirmed the structural integrity of the composite. The photocatalytic activity of SG-[Cr(tta)<sub>3</sub>] was evaluated for the degradation of methylene blue (MB) under Ultraviolet (UV) light irradiation using a UV photocatalytic reactor. Experiments were conducted under varying conditions, including initial dye concentrations (50–1 mg L<sup>−1</sup>), pH levels (2–11), and catalyst dosages (2–20 g L<sup>−1</sup>). The degradation process was monitored using UV–vis spectrophotometry (deuterium lamp) at λ = 664 nm. The composite has exhibited exceptional photocatalytic efficiency, achieving a maximum MB degradation of 99 % under optimized conditions: pH 11, initial MB concentration of 20 mg L<sup>−1</sup>, temperature of 25 °C, and a catalyst dosage of 2 g L<sup>−1</sup>. These results have delivered the significance of SG-[Cr(tta)<sub>3</sub>] as a suitable material for the effective removal of organic pollutants from aqueous environments.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"416 ","pages":"Article 126535"},"PeriodicalIF":5.3,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Toward nanosuspension preparation by modeling the solubility of levofloxacin and ofloxacin in ethanol + water solvent mixtures at different temperatures 通过模拟左氧氟沙星和氧氟沙星在不同温度下在乙醇+水溶剂混合物中的溶解度来制备纳米悬浮液
IF 5.3 2区 化学
Journal of Molecular Liquids Pub Date : 2024-11-21 DOI: 10.1016/j.molliq.2024.126551
Shima Saeedi , Ali Shayanfar , Hafezeh Salehabadi , Sahar Baniyaghoob , Kobra Rostamizadeh
{"title":"Toward nanosuspension preparation by modeling the solubility of levofloxacin and ofloxacin in ethanol + water solvent mixtures at different temperatures","authors":"Shima Saeedi ,&nbsp;Ali Shayanfar ,&nbsp;Hafezeh Salehabadi ,&nbsp;Sahar Baniyaghoob ,&nbsp;Kobra Rostamizadeh","doi":"10.1016/j.molliq.2024.126551","DOIUrl":"10.1016/j.molliq.2024.126551","url":null,"abstract":"<div><div>The present study was conducted to assess the solubility of levofloxacin and ofloxacin in different mono- and mixed solvent systems at different temperatures to provide an experimental basis for the preparation of levofloxacin and ofloxacin nanosuspensions. To this end, the solubility of both compounds was evaluated using a solid–liquid equilibrium technique in DMSO, acetone, ethanol, NMP, and water monosolvents and ethanol–water mixed solvents at different volume fractions and temperatures. The modified versions of the van’t Hoff and Gibbs equations were recruited to calculate the thermodynamic properties of the solutions. The correlation between the solubility data of levofloxacin and ofloxacin and different mathematical models, including the Yalkowsky, Jouyban-Acree, and van’t Hoff models and their combinations was studied. According to the results, the highest and lowest solubility of levofloxacin and ofloxacin were attainable in 1 (pure ethanol monosolvent) and 0.1 v/v of ethanol fractions in ethanol/water mixed solvent. Moreover, the solubility of both compounds was superior at higher temperatures. Afterwards, the nanosuspensions were prepared using the solvent-antisolvent method. Different characterization techniques revealed the formation of the smallest particles with relatively irregular morphology in the 0.1 v/v volume fraction of ethanol in water. The XRD analysis exhibited the typical crystalline diffractions of levofloxacin and ofloxacin and the thermal transitions and stability of both compounds were investigated using DSC and TGA techniques. The results obtained in this study could be used to enhance the solubility and bioavailability of levofloxacin and ofloxacin during the drug formulation development and manufacturing processes.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126551"},"PeriodicalIF":5.3,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-frequency hydrogen-bond stretching vibrations as indicators of the character of molecular aggregation in solutions 作为溶液中分子聚集特性指标的高频氢键伸缩振动
IF 5.3 2区 化学
Journal of Molecular Liquids Pub Date : 2024-11-20 DOI: 10.1016/j.molliq.2024.126530
Yulia V. Novakovskaya , Konstantin L. Tokarev , Ekaterina S. Izmalkova , Vladimir V. Kuznetsov
{"title":"High-frequency hydrogen-bond stretching vibrations as indicators of the character of molecular aggregation in solutions","authors":"Yulia V. Novakovskaya ,&nbsp;Konstantin L. Tokarev ,&nbsp;Ekaterina S. Izmalkova ,&nbsp;Vladimir V. Kuznetsov","doi":"10.1016/j.molliq.2024.126530","DOIUrl":"10.1016/j.molliq.2024.126530","url":null,"abstract":"<div><div>A complementary analysis of the theoretically predicted structure, stability, and vibrational spectra of the H-bonded clusters with an emphasis on the high-frequency IR range typical of proton vibrations makes it possible to judge the probable character of molecular aggregation in solutions if it is driven by H-bonding. This is illustrated by an example of pentamethylene diaziridine (PMDA) solutions in CDCl<sub>3</sub>, the spectra of which involve two characteristic bands with peaks at 3213 and 3265 cm<sup>−1</sup>, the relative intensity of which depends on the PMDA concentration. The analysis showed that the basic building blocks of the crystal structure are scarcely present in the solutions. Actual aggregates are probably stabilized by bi- and trimolecular joints. At the PMDA–chloroform interface, <em>anti</em> single H-bridges between molecules should prevail. At the low concentrations, <em>syn</em> (twisted) double H-bond bridges between the neighboring molecules screened from the solvent can be formed. <em>Anti</em> (nearly planar) double H-bridges should appear at a concentration no lower than 0.5 M, while adjacent <em>syn</em> and <em>anti</em> joints (arranged successively) can probably be found in the inner parts of the aggregates above a content of 0.8 M. The larger H-bonded rings seem to be formed at still higher concentrations. The ring-like joints are expected to be arranged successively with no fused H-bonded rings, which form the basis of the crystal structure. The increase in the experimental IR absorption within the lower-frequency band with an increase in the concentration of PMDA solutions reflects the better structuring inside PMDA aggregates predetermined by the alternation of <em>anti</em>, equatorial, and <em>syn</em> arrangement of the neighboring hydrophobic pentamethylene fragments. This variant becomes possible in large clusters if they have a helical staircase organization.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"416 ","pages":"Article 126530"},"PeriodicalIF":5.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of salt crystallization on electric field-induced asphaltene desorption at brine–oil interface: Insights from molecular dynamics simulations 盐结晶对盐油界面电场诱导沥青烯脱附的影响:分子动力学模拟的启示
IF 5.3 2区 化学
Journal of Molecular Liquids Pub Date : 2024-11-20 DOI: 10.1016/j.molliq.2024.126504
Yingnan Wang , Hongbo Zeng , Tian Tang
{"title":"Effects of salt crystallization on electric field-induced asphaltene desorption at brine–oil interface: Insights from molecular dynamics simulations","authors":"Yingnan Wang ,&nbsp;Hongbo Zeng ,&nbsp;Tian Tang","doi":"10.1016/j.molliq.2024.126504","DOIUrl":"10.1016/j.molliq.2024.126504","url":null,"abstract":"<div><div>Water-in-oil or oil-in-water emulsions, typically stabilized by indigenous surface-active components, are ubiquitous in many natural and industrial settings. In petroleum engineering, these emulsions are highly undesirable owing to their adverse effects on water–oil separation, transportation, quality of the oil products, <em>etc</em>. The application of an external electric field has demonstrated its potential as a promising method for demulsification, especially considering its advantages of energy efficiency and environmental compatibility. The demulsification ability of an electric field arises from the desorption of surface-active species (e.g., asphaltenes in petroleum) from the water–oil interface, which reduces the rigidity of the interfacial film and facilitates the coalescence of the emulsion droplets. The natural presence of salt ions in the water phase, however, can impact electric field induced demulsification process, and this potential influence is studied in this work by molecular dynamics simulations. We report an interesting phenomenon where the presence of NaCl in the water phase can hinder the ability of an electric field to desorb asphaltenes from a brine–oil interface. In particular, NaCl ions exhibit a higher probability of crystallization in bulk brine as the electric field increases, and this crystallization releases free water to the brine–oil interface which hampers the desorption of a model asphaltene. In contrast, CaCl<sub>2</sub> lacks the tendency to crystallize, and as the electric field strengthens a continued increase is observed in the desorption of the model asphaltene. Therefore, demulsification by electric field is potentially more effective for brine–oil systems containing CaCl<sub>2</sub> than those containing NaCl. This work highlights the interplay between salt ions and electric field, and how it influences interfacial behaviors of surface-active molecules. The findings could benefit the design and optimization of demulsification technologies in industries such as wastewater management, petroleum processing and other chemical treatments.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"416 ","pages":"Article 126504"},"PeriodicalIF":5.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142697235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Retraction notice to “Molecular structure solvent–solute, electronic, topology and dynamics simulation studies on 2-[[1-(cyclopropyl methoxy)-4-hydroxy-2-oxoquinoline-3-carbonyl] amino] acetic acid- an effective CKD drug” [J. Mol. Liq. 391 (2023) 123251]
IF 5.3 2区 化学
Journal of Molecular Liquids Pub Date : 2024-11-20 DOI: 10.1016/j.molliq.2024.126515
P. Manikandan , M. Kumar , S. Chithra , A. Jeelani , Jamal M. Khaled , Ghulam Abbas , S. Muthu
{"title":"Retraction notice to “Molecular structure solvent–solute, electronic, topology and dynamics simulation studies on 2-[[1-(cyclopropyl methoxy)-4-hydroxy-2-oxoquinoline-3-carbonyl] amino] acetic acid- an effective CKD drug” [J. Mol. Liq. 391 (2023) 123251]","authors":"P. Manikandan ,&nbsp;M. Kumar ,&nbsp;S. Chithra ,&nbsp;A. Jeelani ,&nbsp;Jamal M. Khaled ,&nbsp;Ghulam Abbas ,&nbsp;S. Muthu","doi":"10.1016/j.molliq.2024.126515","DOIUrl":"10.1016/j.molliq.2024.126515","url":null,"abstract":"","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"416 ","pages":"Article 126515"},"PeriodicalIF":5.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gemini surfactant-engineered di-Schiff bases: Tailoring hydrophobicity to enhance catalytic and biological activities 双子表面活性剂工程化二希夫碱:定制疏水性以增强催化和生物活性
IF 5.3 2区 化学
Journal of Molecular Liquids Pub Date : 2024-11-20 DOI: 10.1016/j.molliq.2024.126498
Asma M. Elsharif , Ahmed H. Elged , Eman A. Ghiaty , Samy M. Shaban
{"title":"Gemini surfactant-engineered di-Schiff bases: Tailoring hydrophobicity to enhance catalytic and biological activities","authors":"Asma M. Elsharif ,&nbsp;Ahmed H. Elged ,&nbsp;Eman A. Ghiaty ,&nbsp;Samy M. Shaban","doi":"10.1016/j.molliq.2024.126498","DOIUrl":"10.1016/j.molliq.2024.126498","url":null,"abstract":"<div><div>This study explores the enhancement of catalytic performance of silver nanoparticles (AgNPs) using a series of gemini surfactants based on di-azomethine with varying hydrophobic tail lengths: <strong>DSGO</strong>, <strong>DSGD</strong>, and <strong>DSGH</strong>. By fine-tuning the molecular structure of these surfactants, we aim to develop more effective catalysts for purifying polluted water sources. The high surface energy of AgNPs often results in their aggregation, reducing their catalytic efficacy. However, increasing the surfactant tail length from 8 (<strong>DSGO</strong>) to 16 (<strong>DSGH</strong>) carbon atoms improves the stability and dispersibility of AgNPs, as confirmed by DLS, TEM, and UV analyses. <strong>DSGH</strong>, with its longer carbon tail, facilitates AgNPs synthesis with superior stability and smaller particle size, indicated by a higher zeta potential of +55.6 mV and a reduced size of 15.1 nm. This is attributed to the increased surface activity and hydrophobicity of the surfactants. As the tail length increases from 8 to 16, the investigated surfactant’s tendency for micellization and adsorption rises. Notably, <strong>DSGH</strong> exhibits the lowest critical micelle concentration (CMC) of 406 μM and the highest adsorption Gibbs free energy (ΔG°ads) of −59.08 kJ·mol<sup>−1</sup> at 20 °C, enabling strong adsorption onto AgNPs. By modulating surfactant hydrophobicity, we effectively regulated AgNP catalytic activity. The <strong>DSGH/AgNP</strong>s composite shows enhanced catalytic activity, efficiently converting p-nitrophenol (p-NP) and methylene blue (MB) into less toxic species with apparent rate constants (<em>k<sub>app</sub></em>) of 0.368 and 0.537 min<sup>−1</sup>, respectively. Additionally, the AgNP-incorporated gemini surfactants exhibit promising antimicrobial activity against tested bacteria and fungi. Remarkably, the <strong>DSGD/AgNPs</strong> hybrid system surpasses commonly used commercial antimicrobial agents in efficacy. This study underscores the potential of manipulating surfactant structure to control the catalytic and antimicrobial activity of AgNPs.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"417 ","pages":"Article 126498"},"PeriodicalIF":5.3,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142724036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessing synergistic effects: Ion-inducing and intermolecular interactions behind the aggregation and migration behaviors of crude molecules 评估协同效应:粗分子聚集和迁移行为背后的离子诱导和分子间相互作用
IF 5.3 2区 化学
Journal of Molecular Liquids Pub Date : 2024-11-20 DOI: 10.1016/j.molliq.2024.126547
Lin Hu , Baohua Hu , Teng Yang , Haichao Fu , Shuai Chen , Xiaolai Zhang , Shinling Yuan
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