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Title

Supramolecular chirality of columnar mesophases consisting of H-bonded complexes of melamine and polycatenar benzoic acids

AuthorsBarberá, Joaquín; Romero, Pilar ; Serrano, José Luis; Sierra, Teresa
KeywordsOrganic compounds
Aromatics
Synthon
Mesophases
Issue Date2006
PublisherRoyal Society of Chemistry
CitationJournal of Materials Chemistry 2006(16): 3768-3773 (2006)
AbstractThe present work describes a series of H-bonded complexes consisting of a melamine derivative and polycatenar acids that show columnar liquid crystalline behaviour. Chirality has been transferred from the molecular blocks (either the acids, A3* and A4*, or the melamine, T2*) to the columnar organization. Particular effort and attention has been paid to structural characterization by NMR techniques [1D NMR spectroscopy and diffusion-ordered spectroscopy (DOSY) experiments] of the complexes in solution. The mesomorphic arrangements of all the complexes have been studied by polarizing optical microscopy (POM), differential scanning microscopy (DSC) and powder X-ray diffraction. The chiral nature of the supramolecular organization in the mesophase has been confirmed by circular dichroism spectroscopy on neat samples over a range of temperatures.
Description6 pages, 6 figures, 2 tables, 2 schemes.-- et al.
Publisher version (URL)http://dx.doi.org/10.1039/b608066a
URIhttp://hdl.handle.net/10261/19109
DOI10.1039/b608066a
ISSN0959-9428
Appears in Collections:(ICMA) Artículos
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