title: Gel-like lyomesophases formed in organic solvents by self-assembled guanine ribbons.
abstract: Lipophilic guanosine derivatives are self-assembled into ribbonlike aggregates, both in the crystal state and in solution. The structure of the ribbons has been characterised by single-crystal X-ray diffraction and, in solution, by NMR spectroscopy and ESI-MS. Two different ribbons with different patterns of hydrogen bonds are present in the solid state and in chloroform solutions. The gel-like phases obtained in hexadecane, toluene and chloroform have been investigated by optical microscopy and small-angle X-ray diffraction: the type of phase observed is related to the molecular structure of the compounds and depends dramatically on the solvent. The structures of the phases are discussed, with the presence of the two different ribbons being taken into account.
authors: Alma Mater Studiorum-Università di Bologna Dipartimento di Chimica Organica A. Mangini Via S. Donato 15, 40127 Bologna, Italy.
authors: Tatiana
authors: T
authors: Giorgi
authors: Fabrizia
authors: F
authors: Grepioni
authors: Ilse
authors: I
authors: Manet
authors: Paolo
authors: P
authors: Mariani
authors: Stefano
authors: S
authors: Masiero
authors: Elisabetta
authors: E
authors: Mezzina
authors: Silvia
authors: S
authors: Pieraccini
authors: Letizia
authors: L
authors: Saturni
authors: Gian Piero
authors: GP
authors: Spada
authors: Giovanni
authors: G
authors: Gottarelli