A comprehensive examination of the ethanol gels produced with D-sorbitol, one of the simplest and lowest mass organogelator molecules known, is reported. Data from several spectroscopic and structural experiments reveal that the nature of the self-assembled fibrillar assemblies, spherulites for the most part, depends acutely on the manner in which the sol phase is treated. The critical concentration to form a gel at room temperature is ca. 1.5 wt% and a plateau value for melting the gels, ca. 50 degrees C, is reached near 3.5 wt%. Ostwald ripening, whose rate, again, depends on the history of the preparation, was also observed.
D-Sorbitol, a structurally simple, low molecular-mass gelator / Scilla Grassi; Emiliano Carretti; Luigi Dei; Charles W. Branham; Bart Kahr; Richard G. Weiss. - In: NEW JOURNAL OF CHEMISTRY. - ISSN 1144-0546. - ELETTRONICO. - 35:(2011), pp. 445-452. [10.1039/C0NJ00673D]
D-Sorbitol, a structurally simple, low molecular-mass gelator
CARRETTI, EMILIANO;DEI, LUIGI;
2011
Abstract
A comprehensive examination of the ethanol gels produced with D-sorbitol, one of the simplest and lowest mass organogelator molecules known, is reported. Data from several spectroscopic and structural experiments reveal that the nature of the self-assembled fibrillar assemblies, spherulites for the most part, depends acutely on the manner in which the sol phase is treated. The critical concentration to form a gel at room temperature is ca. 1.5 wt% and a plateau value for melting the gels, ca. 50 degrees C, is reached near 3.5 wt%. Ostwald ripening, whose rate, again, depends on the history of the preparation, was also observed.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.