http://www.cnr.it/ontology/cnr/individuo/prodotto/ID17645

Spectroscopic and structural investigation of the confinement of d and I dimethyl tartrate in lecithin reverse micelles (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Spectroscopic and structural investigation of the confinement of d and I dimethyl tartrate in lecithin reverse micelles (Articolo in rivista) (literal)

Anno

2009-01-01T00:00:00+01:00 (literal)

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

10.1021/jp809793u (literal)

Alternative label

Abbate S.; Castiglione F.; Lebon F.; Longhi G.; Longo A.; Mele A.; Panzeri W.; Ruggirello A.; Turco Liveri V (2009)
Spectroscopic and structural investigation of the confinement of d and I dimethyl tartrate in lecithin reverse micelles
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

Abbate S.; Castiglione F.; Lebon F.; Longhi G.; Longo A.; Mele A.; Panzeri W.; Ruggirello A.; Turco Liveri V (literal)

Pagina inizio

3024 (literal)

Pagina fine

3033 (literal)

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

113 (literal)

Rivista

?The ?journal of physical chemistry. B (Rivista)

Note

Scopus (literal)
ISI Web of Science (WOS) (literal)

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

Dipartimento di Scienze Biomediche e Biotecnologie, UniVersita` di Brescia, Viale Europa 11, 25123, Brescia, Italy, Consorzio Nazionale InteruniVersitario per le Scienze Fisiche della Materia (CNISM), Via della Vasca NaVale, 84 - 00146 Roma, Italy, Dipartimento di Chimica Fisica, UniVersita` di Palermo, Viale delle Scienze, Parco d'Orleans II, 90128, Palermo, Italy, Dipartimento di Chimica, Materiali e Ing. Chimica, \"Giulio Natta\" Politecnico di Milano, Via L. Mancinelli, 7 - 20131 Milano, Italy, ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, CNR, Via U. La Malfa 153, 90146 Palermo, Italy, and ICRM, Instituto di Chimica del Riconoscimento Molecolare, CNR, Via L. Mancinelli, 7-20131 Milano, Italy (literal)

Titolo

Spectroscopic and structural investigation of the confinement of d and I dimethyl tartrate in lecithin reverse micelles (literal)

Abstract

The confinement of D and L dimethyl tartrate in lecithin reverse micelles dispersed in cyclohexane has been investigated by FT-IR, polarimetry, electronic and vibrational circular dichroism (ECD and VCD), 1H NMR, and small-angle X-ray scattering (SAXS). Measurements have been performed at room temperature as a function of the solubilizate-to-surfactant molar ratio (R) at fixed lecithin concentration. The analysis of experimental data indicates that the dimethyl tartrate molecules are solubilized within reverse micelles in proximity to the surfactant head groups in the same way for the D and L forms. The encapsulation of dimethyl tatrate within lecithin reverse micelles involves changes in its H-bonds, from what is observed in the pure solid or in CCl4 solutions; this is a consequence of the establishment of specific solute-surfactant headgroup interactions and of confinement effects. In the 0 e R e 1.7 range, SAXS profiles of dimethyl tartrate/lecithin/ cyclohexane micellar solutions are well-described by a model of interacting polydisperse spherical micellar cores whose mean radius does not change appreciably with R (i.e., it changes from about 18 to 20 Å). 1H NMR diffusion measurements of both dimethyl tartrates and lecithin were rationalized in terms of collective translational motions of the entire micellar aggregate and of their molecular diffusion among clusters of reverse micelles. The association of optically active lecithin with D and L dimethyl tartrate leads to the formation of self-organized supramolecular aggregates whose interesting chiroptical features are evidenced by polarimetry and CD. (literal)

Editore