Sublimation point depression of tris(8-hydroxyquinoline)aluminum(III) (Alq3) by crystal engineering

被引：40

作者：

Lee, Tu

Lin, Ming Shiou

机构：

[1] Natl Cent Univ, Dept Chem & Mat Engn, Jhong Li City 320, Taiwan

[2] Natl Cent Univ, Inst Mat Sci & Engn, Jhong Li City 320, Taiwan

来源：

CRYSTAL GROWTH & DESIGN | 2007年 / 7卷 / 09期

关键词：

D O I：

10.1021/cg070226e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An initial solvent screening technique using 23 kinds of common organic solvents was utilized to engineer the polymorphisin and crystallinity of the solids of organic electroluminescent molecules of tris(8-hydroxyquinoline) aluminum(III) (Alq3). Pure AIq3 recrystallized from N,N-dimethyl formamide (DMF) by temperature cooling from 60 to 25 degrees C gave rodlike, semicrystalline solid materials with traces of delta-form having a sublimation point of only around 200 15 degrees C. The sublimation point depression of source materials could reduce the current evaporation temperature of organic light-emitting diodes (OLEDs) drastically. In addition, three new solvates of Alq3(C6H5NO2)(1/5)(H2O)(6), Alq3(CHCl3)(1/4), and Alq(3)(C4H8O2)(1/2) were discovered from the initial solvent screening.

引用

页码：1803 / 1810

页数：8

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