0000000000605674

AUTHOR

Catalin Gainaru

showing 2 related works from this author

Non-ideal mixing behavior in dibutyl phosphate-propylamine binary liquids: Dielectric and nuclear magnetic resonance investigations

2021

Abstract Owing to the amphiphilic nature of their constituent molecules, binary mixtures of pure liquid surfactants are usually characterized by enhanced nano-segregation and thus can exhibit interesting transport properties and complex macroscopic behavior. In this ambit it was recently shown by Turco Liveri et al. (J. Mol. Liq. 263 (2018) 274–281) at room temperature that mixtures of short aliphatic chains compounds, such as dibutyl phosphate (DBP) and n-propylamine (PA) liquids, due to their ability to allow for phosphate-to-amine proton transfer, display ionic liquid–like behavior with composition-dependent enhanced conductivity, viscosity, and magnetically-induced birefringence. To und…

Materials scienceProtonn-propyl amine; Dibutyl phosphate; Liquid mixtures; Self-assembly; Decoupling of dynamical processes; Ionic liquidsIonic bondingPropylamineDielectricConductivityCondensed Matter PhysicsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsDielectric spectroscopychemistry.chemical_compoundViscosityNuclear magnetic resonancechemistryMaterials ChemistryMoleculePhysical and Theoretical ChemistrySpectroscopy
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Nuclear Spin Relaxation in Viscous Liquids: Relaxation Stretching of Single-Particle Probes

2021

Spin-lattice relaxation rates R1(ω,T), probed via high-field and field-cycling nuclear magnetic resonance (NMR), are used to test the validity of frequency-temperature superposition (FTS) for the reorientation dynamics in viscous liquids. For several liquids, FTS is found to apply so that master curves can be generated. The susceptibility spectra are highly similar to those obtained from depolarized light scattering (DLS) and reveal an excess wing. Where FTS works, two approaches are suggested to access the susceptibility: (i) a plot of deuteron R1(T) vs the spin-spin relaxation rate R2(T) and (ii) a plot of R1(T) vs an independently measured reference time τref(T). Using single-frequency s…

Coupling constantCouplingHot TemperatureMagnetic Resonance SpectroscopyMaterials scienceViscosityTemperatureViscous liquidMagnetic Resonance ImagingMolecular physicsLight scatteringSpectral lineSurfaces Coatings and FilmsSuperposition principleDeuteriumMaterials ChemistryRelaxation (physics)Physical and Theoretical ChemistryThe Journal of Physical Chemistry B
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