prof. UAM dr hab. Mikołaj Pochylski

@article{CALANDRA2021114963,

title = {Non-ideal mixing behavior in dibutyl phosphate-propylamine binary liquids: Dielectric and nuclear magnetic resonance investigations},

author = {Pietro Calandra and Vincenzo Turco Liveri and Noemi Proietti and Donatella Capitani and Domenico Lombardo and Catalin Gainaru and Roland Böhmer and Maciej Kozak and Maria Dobies and Zbigniew Fojud and Mikołaj Pochylski},

url = {https://www.sciencedirect.com/science/article/pii/S0167732220372056},

doi = {https://doi.org/10.1016/j.molliq.2020.114963},

issn = {0167-7322},

year  = {2021},

date = {2021-01-01},

journal = {Journal of Molecular Liquids},

volume = {323},

pages = {114963},

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 understand the molecular mechanisms at the basis of this behavior, in the present study a combination of nuclear magnetic resonance (NMR) and dielectric spectroscopy investigations has been carried out for the same materials for different amine molar ratios. It was found that at certain compositions all studied dynamical processes (conformational changes, local hopping of “free” protons among neighboring polar headgroups, long-range charge migration) exhibit significant deviations from ideal mixing behavior. The microscopic origin of these deviations is discussed.},

keywords = {-propyl amine, Decoupling of dynamical processes, Dibutyl phosphate, Ionic liquids, liquid mixtures, self-assembly},

pubstate = {published},

tppubtype = {article}

}