Abstract
| Lingua originale | English |
|---|---|
| pagine (da-a) | 149-154 |
| Numero di pagine | 6 |
| Rivista | Journal of Colloid and Interface Science |
| Volume | 343 |
| Stato di pubblicazione | Published - 2010 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Colloid and Surface Chemistry
- Surfaces, Coatings and Films
- Biomaterials
Cita questo
Fast proton conduction in hydrogen bonded microheterogeneous systems: Bis(2-ethylhexyl)phosphoric acid/N-methyl formamide liquid mixtures. / Turco Liveri, Vincenzo; Passarello, Marco; Calandra, Pietro.
In: Journal of Colloid and Interface Science, Vol. 343, 2010, pag. 149-154.Risultato della ricerca: Article
}
TY - JOUR
T1 - Fast proton conduction in hydrogen bonded microheterogeneous systems: Bis(2-ethylhexyl)phosphoric acid/N-methyl formamide liquid mixtures
AU - Turco Liveri, Vincenzo
AU - Passarello, Marco
AU - Calandra, Pietro
PY - 2010
Y1 - 2010
N2 - Structural and dynamical properties of bis(2-ethylhexyl)phosphoric acid (HDEHP)/N-methyl formamide (NMF) liquid mixtures in the whole composition range have been investigated by Fourier Transform Infrared spectroscopy (FT-IR), X-rays Diffraction (XRD), and AC complex impedance spectroscopy. Driven by hydrogen bond interactions among HDEHP PO4H group and NMF CO and NH groups, and also by steric effects among the HDEHP alkyl chains, the system microstructure is mainly characterized by the coexistence of spatially separated hydrophilic and hydrophobic nanodomains showing local organization and short-range order. The evolution of this structural feature with system composition has been highlighted by FT-IR and XRD. On the other hand, the thermally activated proton mobility within these hydrophilic domains, as pointed out by AC complex impedance measurements, emphasizes the occurrence of a percolating behaviour characterized by percolation threshold at zero. Due to fast proton conduction across the interconnected network formed by the polar groups, some samples showed very high room-temperature conductivity up to 10 3 S cm 1.
AB - Structural and dynamical properties of bis(2-ethylhexyl)phosphoric acid (HDEHP)/N-methyl formamide (NMF) liquid mixtures in the whole composition range have been investigated by Fourier Transform Infrared spectroscopy (FT-IR), X-rays Diffraction (XRD), and AC complex impedance spectroscopy. Driven by hydrogen bond interactions among HDEHP PO4H group and NMF CO and NH groups, and also by steric effects among the HDEHP alkyl chains, the system microstructure is mainly characterized by the coexistence of spatially separated hydrophilic and hydrophobic nanodomains showing local organization and short-range order. The evolution of this structural feature with system composition has been highlighted by FT-IR and XRD. On the other hand, the thermally activated proton mobility within these hydrophilic domains, as pointed out by AC complex impedance measurements, emphasizes the occurrence of a percolating behaviour characterized by percolation threshold at zero. Due to fast proton conduction across the interconnected network formed by the polar groups, some samples showed very high room-temperature conductivity up to 10 3 S cm 1.
KW - Fast proton conduction systems Microheterogeneous liquid mixtures Bis(2-ethylhexyl)phosphoric acid N-methyl formamide
UR - http://hdl.handle.net/10447/46322
M3 - Article
VL - 343
SP - 149
EP - 154
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
SN - 0021-9797
ER -