Article
Chemistry, Analytical
Xue Wang, Tongyu Liu, Ping Wang, Haixia Yu, Lili Sui, Hongyuan Wu, Lei Xu, Haoyan Wang, Yingming Xu, Lihua Huo
Summary: Hollow NiO microspheres were prepared using a one-step hydrothermal method assisted by a geminal dicationic ionic liquid, and the structures and properties of the microspheres can be controlled by adjusting the concentration of the ionic liquid and reaction temperature. Among them, the NiO hollow microspheres prepared at 600 degrees C exhibited the most excellent gas sensing performance, making them a promising candidate material for highly sensitive gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Applied
Arifa Shaheen, Ab Waheed Mir, Rabia Arif, Ritu Bala
Summary: The micellar, surface, and aggregation properties of biocompatible, imidazolium-based hydroxyl group-containing gemini surfactants were studied in this research. The structural features of these gemini surfactants enhance their surface-active properties, making them potentially significant for pharmaceutical and biomedical applications. Gemini surfactants may have great implications in drug formulations and delivery due to their prominent aggregation and non-cytotoxic nature.
JOURNAL OF SURFACTANTS AND DETERGENTS
(2021)
Article
Chemistry, Multidisciplinary
Yimin Hu, Yu Chen, Zixian Cai, Shaoan Lei, Rong Guo
Summary: A series of imidazolium gemini surfactants were synthesized and their surface activities and aggregation behaviors in water were investigated. These surfactants formed lamellar liquid crystals at low temperatures and transitioned into wormlike micelles as the temperature increased. The viscoelasticity of the wormlike micelles showed an unusual increase and decrease with temperature, retaining high viscoelasticity up to 90.0 degrees C or above.
Article
Chemistry, Physical
Vijay Padwal, Aditya Narvekar, Shailesh Dugam, Radhika Pachpore, Prajakta Dandekar, Ratnesh Jain
Summary: Evaluating the stability and biological activity of monoclonal antibodies is crucial for their optimal performance. pH buffers, surfactants, salts, and sugars are commonly used to control aggregation of antibodies. In this study, 2-MIDHP was found to be a potent acid-resistant agent that effectively prevented aggregation of Bevacizumab.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Patrick Li, Maria Reinhardt, Samantha S. Dyer, Kara E. Moore, Omar Q. Imran, Douglas L. Gin
Summary: Seven homologues of an amphiphilic gemini monomer were synthesized and screened for their ability to form a bicontinuous cubic (Q) lyotropic liquid crystal phase. Four of these homologues were found to form a Q phase with glycerol or water that can be cross-linked while retaining the nanoporous structure, with one homologue exhibiting a well-ordered Q phase with a wider phase window than the parent monomer.
Article
Biochemistry & Molecular Biology
Leysan Vasileva, Gulnara Gaynanova, Farida Valeeva, Elvira Romanova, Rais Pavlov, Denis Kuznetsov, Grigory Belyaev, Irina Zueva, Anna Lyubina, Alexandra Voloshina, Konstantin Petrov, Lucia Zakharova
Summary: The synthesis procedure and properties of a new series of dicationic gemini surfactants with a dodecane spacer and two carbamate fragments were comprehensively described. The critical micelle concentrations of the surfactants were determined, and their functional activities were evaluated. The synthesized surfactants were used for the modification of liposomes for the treatment of Alzheimer's disease, showing promising results in preventing memory impairment and reducing plaques in a transgenic mouse model.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Applied
Ab Waheed Mir, Arifa Shaheen, Mohammad Rafiq Wani, Rabia Arif
Summary: The fatty acid-based imidazolium gemini surfactants with hydroxy-substituted spacers were synthesized and characterized, and their micellization behavior and cytotoxicity were studied. The results showed that these gemini surfactants have low cytotoxicity, environmental friendliness, and potential as substitutes for conventional drug delivery systems.
JOURNAL OF SURFACTANTS AND DETERGENTS
(2022)
Article
Chemistry, Physical
Le-Chi Zheng, Qing-Xiao Tong
Summary: Two series of novel gemini surfactants with morpholinium headgroup and benzene-based rigid spacers were synthesized and characterized. The surfactants showed superior surface activity and antibacterial properties, with (Mor)m-BP-m exhibiting stronger aggregation tendency compared to (Mor)m-P-m.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Ala'a F. Eftaiha, Abdussalam K. Qaroush, Ahmad S. Abo-shunnar, Suhad B. Hammad, Khaleel I. Assaf, Feda'a M. Al-Qaisi, Matthew F. Paige
Summary: This study reports on the synthesis and monolayer properties of conventional and gemini surfactants based on nicotinic acid. The results show that the chemical structures of these surfactants significantly affect the behavior of monolayers, leading to different surface patterns. The study also demonstrates the controllability of mixed films by modifying the structure of nicotinic acid surfactants.
Article
Chemistry, Multidisciplinary
Prabhjot Kaur, Jaspreet Kaur Rajput, Kultar Singh, Poonam Khullar, Mandeep Singh Bakshi
Summary: In this study, silver and gold nanoparticles were used as color indicators to determine the adsorption of monomers/micelles on the nanoparticle surface. A simple method based on color change was developed, and the adsorption behavior of Gemini surfactants was monitored. UV-visible measurements showed significant changes in the intensity and wavelength of absorbance when the monomer/micelle of Gemini surfactants adsorbed onto the silver/gold nanoparticles. FT-IR and XPS measurements were conducted to determine the mechanism of surface adsorption and molecular orientation. The results demonstrated distinct color changes for silver nanoparticles (yellow to red) and gold nanoparticles (red to purple) when the Gemini surfactant monomer/micelle adsorbed onto the nanoparticle surface. This colorimeter-based method highlights the applicability of silver and gold nanoparticles in complex media with surface-active molecules.
Article
Chemistry, Physical
Martin Pisarcik, Martin Bajcura, Milos Lukac, Ferdinand Devinsky, Andrea Bilkova, Frantisek Bilka, Branislav Horvath
Summary: Novel cationic gemini surfactants with two amide groups and variable alkyl chain lengths were synthesized and characterized. The critical micelle concentration of the surfactants was determined and correlated with interfacial area, micelle ionisation degree, and thermodynamics properties. The formation of small spherical micelles was confirmed by particle size analysis, and the zeta potential of the surfactants increased with longer alkyl chain lengths. The antimicrobial activity of the surfactants showed a dependence on alkyl tail length, with the short-chain surfactant exhibiting the highest efficiency.
COLLOID AND POLYMER SCIENCE
(2023)
Article
Engineering, Chemical
Priya Pandey, Anthony E. Somers, Samik K. Hait, Maria Forsyth, S. S. Ramakumar
Summary: The short chain ILs as lubricant additives can significantly reduce friction and wear, and can avoid evidence of tribo-chemical reactions on the steel surface.
Article
Energy & Fuels
Mohsen Ramezani, Mostafa Lashkarbolooki, Reza Abedini, Mohammad Barari
Summary: Imidazolium-based ionic liquids are environmentally friendly surfactants that show high performance in reducing interfacial tension. Adjusting the ion composition of the aqueous media is an important feature in smart water-enhanced oil recovery. The nature of the oil type has a dominant effect on the surface activity of [C(12)mim]Cl compared to the effect of ion type (brine composition).
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Physical
Wenchang Zhuang, Chunhua Zhao, Yue Pan, Qintang Li
Summary: The physiochemical properties of ionic liquids can be tuned by the structure of ions, affecting the self-assembly of surfactants. Different alkyl chains on the imidazolium group lead to varying aggregation behaviors in aprotic ionic liquids (AILs).
Article
Chemistry, Physical
Ab Waheed Mir, Arifa Shaheen, Rabia Arif, Muzammil Sharief Dar
Summary: The study investigates the interactions between a local anesthetic drug and a non-cytotoxic imidazolium gemini surfactant, revealing various modes of interactions such as hydrophobic, cation-pi, and hydrogen bonding. The findings suggest that the binding of the drug with the gemini surfactants decreases with an increase in surfactant chain length. Additionally, the gemini surfactants exhibit antibacterial activity against both gram-positive and gram-negative bacteria, highlighting their potential in biomedical and pharmaceutical fields.
JOURNAL OF SOLUTION CHEMISTRY
(2021)