Interplay between optical properties and molecular packing in novel isolated crystalline phases of tris-(8-hydroxyquinoline) Aluminium (III)
Articolo
Data di Pubblicazione:
2001
Citazione:
Interplay between optical properties and molecular packing in novel isolated crystalline phases of tris-(8-hydroxyquinoline) Aluminium (III) / M. Brinkmann, G. Gadret, C. Taliani, N. Masciocchi, A. Sironi, M. Muccini. - In: SYNTHETIC METALS. - ISSN 0379-6779. - 121:1-3(2001), pp. 1499-1500. [10.1016/S0379-6779(00)01440-5]
Abstract:
Two novel unsolvated polymorphs of tris-(8-hydroxyquinoline) Aluminium (IIl) (Alq3) have been synthesized and their crystalline structure determined from X-ray diffraction data on powders and single crystals. Both these crystal structures are triclinic, consist of a racemic mixture of the mer isomer, and are characterized by different molecular packings involving short contacts between quinoline ligands belonging to symmetry related Alq3 molecules (inter-ligand spacings in the 3.5-3.9 Å range). Investigations of the different crystal phases, as well as of vacuum sublimed thin films by spectroscopic techniques, allowed to highlight the effect of the molecular packing on the optical emission properties, and to clarify the nature of the photoexcitations.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Optical absorption and photoluminescence spectroscopy
Single crystal growth
Vacuum sublimed films
Elenco autori:
M. Brinkmann, G. Gadret, C. Taliani, N. Masciocchi, A. Sironi, M. Muccini
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