Growth and Crystal Structure of Alq3 Single Crystals. A new structure showing π-π and CH-π interactions.

摘要

Tris-(8-hydroxyquinolinc) aluminum Ⅲ (Alq_3) is a stable metal chelate that has received a great deal of attention over the past years due to its use in the fabrication of organic light emitting diodes (OLED). Despite all the interest in this remarkable material very little information on its' solid-state properties and packing exists. Nearly all of the available information comes from studies that have been carried out on vacuum deposited thin films.This is mainly due to the difficulty in obtaining large high quality/high purity single crystals of Alq_3. While much information can be obtained from the study of powders and thin films, the presence of disorder, traps, grain boundaries and impurities can obscure the intrinsic properties of the materials under investigation. Therefore studies on high-qualily single crystals are required in order to gain a clear understanding of the fundamental properties of these materials. Despite the great interest that Alq_3. has generated, to date there have been very few reports of the growth and characterization of single crystals of this material. Fuji et.