Temperature-dependent anomalous viscosity of aqueous solutions of imidazolium-based ionic liquids

Kaushik, Devansh; Hitaishi, Prashant; Kumar, Ashwani; Sen, Debasis; Kamil, Syed Mohammad; Ghosh, Sajal K.

doi:10.1039/d3sm00333g

Cited by 1 publication

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References 93 publications

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“…The class of salts known as ILs is made up of cations and anions and is distinguished by its distinct physicochemical properties, typically possessing a melting point at or below 100 °C. − These flexible and environmentally friendly molecules offer a wide range of potential applications in IL-based technologies owing to their nonvolatility, high recovery rates, and diverse range of advantageous characteristics. ,,− The interaction between DNA and ILs has recently seen a significant increase in research activity due to the wide range of potential applications in areas like drug delivery, gene therapy, and biosensors. − Jumbri et al demonstrated the binding mode of imidazolium-based ILs ([C n bmim]Br where n = 2,4,6) with calf thymus DNA using molecular docking and fluorescence experiments . Chandran et al shed light on the atomistic mechanisms underlying the exceptional stability displayed by DNA in ILs in a separate study.…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid-Induced Assembly of DNA at Air–Water Interface

Sharma,

Seth,

Giri

et al. 2023

Langmuir

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DNA nanotechnology is the future of many products in the pharmaceutical and cosmetic industries. Selfassembly of this negatively charged biopolymer at surfaces and interfaces is an essential step to elaborate its field of applications. In this study, the ionic liquid (IL) monolayer-assisted self-assembly of DNA macromolecules at the air−water interface has been closely monitored by employing various quantitative techniques, namely, surface pressure−area (π−A) isotherms, surface potential, interfacial rheology, and X-ray reflectivity (XRR). The π−A isotherms reveal that the IL 1,3-didecyl 3-methyl imidazolium chloride induces DNA self-assembly at the interface, leading to a thick viscoelastic film. The interfacial rheology exhibits a notable rise in the viscoelastic modulus as the surface pressure increases. The values of storage and loss moduli measured as a function of strain frequency suggest a relaxation frequency that depends on the length of the macromolecule. The XRR measurements indicate a considerable increase in DNA layer thickness at the elevated surface pressures depending on the number of base pairs of the DNA. The results are considered in terms of the electrostatic and hydrophobic interactions, allowing a quantitative conclusion about the arrangement of DNA strands underneath the monolayer of the ILs at the air−water interface.

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