title: The structure of the blue luminescent delta-phase of tris(8-hydroxyquinoline)aluminium(III) (Alq3).
abstract: The existence of the facial isomer in the delta-phase of Alq3 is proven by X-ray structural analysis, revealing that both the different molecular structure and the weaker overlap of the pi-orbitals of hydroxyquinoline ligands belonging to neighboring Alq3 molecules as compared to other phases (alpha, beta) are likely to be the origin of the significantly different optical properties of delta-Alq3.
authors.affiliation: Universität Bayreuth, Experimentalphysik II, Universitätsstr. 30, 95440 Bayreuth, Germany. michael.coelle@uni-bayreuth.de
authors.forename: Michael
authors.initials: M
authors.lastname: Cölle
authors.forename: Robert E
authors.initials: RE
authors.lastname: Dinnebier
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Brütting