http://www.cnr.it/ontology/cnr/individuo/prodotto/ID39721

Nanoscale segregation in room temperature ionic liquids (Articolo in rivista)

Type

Label

Nanoscale segregation in room temperature ionic liquids (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

Triolo A.1; O. Russina2; H.-J. Bleif2; and E. Di Cola3 (2007)
Nanoscale segregation in room temperature ionic liquids
in The journal of physical chemistry. B; ACS, American chemical society, Washington, DC (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

1 Istituto per i Processi Chimico-Fisici, Consiglio Nazionale delle Ricerche, Via La Farina, 237, I-98123 Messina, Italy; 2 Hahn-Meitner Institut, Glienicker str. 100, D-14109 Berlin, Germany; and 3 ESRF, 6 rue Jules Horowitz, BP 220, F-38043 Grenoble Cedex, France (literal)

Titolo

Abstract

Room-temperature ionic liquids (RTILs) are organic salts that are characterized by low melting points. They are considered to possess a homogeneous microscopic structure. We provide the first experimental evidence of the existence of nanoscale heterogeneities in neat liquid and supercooled RTILs, such as 1-alkyl-3-methyl imidazolium-based salts, using X-ray diffraction. These heterogeneities are of the order of a few nanometers and their size is proportional to the alkyl chain length. These results provide strong support to the findings from recent molecular dynamics simulations, which proposed the occurrence of nanostructures in RTILs, as a consequence of alkyl chains segregation. Moreover, our study addresses the issue of the temperature dependence of the heterogeneities size, showing a behavior that resembles the density one only below the glass transition, thus suggesting a complex behavior above this temperature. These results will provide a novel interpretation approach for the unique chemical physical properties of RTILs. (literal)

Editore