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

Tu Lee; Ming Shiou Lin

doi:10.1021/cg070226e

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

Tu Lee, Ming Shiou Lin

Department of Chemical and Materials Engineering

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

An initial solvent screening technique using 23 kinds of common organic solvents was utilized to engineer the polymorphism and crystallinity of the solids of organic electroluminescent molecules of tris(8-hydroxyquinoline) aluminum(III) (Alq3). Pure Alq3 recrystallized from N,N-dimethyl formamide (DMF) by temperature cooling from 60 to 25°C gave rodlike, semicrystalline solid materials with traces of δ-form having a sublimation point of only around 200 ± 5°C. The sublimation point depression of source materials could reduce the current evaporation temperature of organic hght-emitting diodes (OLEDs) drastically. In addition, three new solvates of Alq₃(C ₆H₅NO₂) 1/5(H₂O)₆, Alq₃(CHCl₃)_1/4, and Alq₃(C ₄H₈O₂)_1/2 were discovered from the initial solvent screening.

Original language	English
Pages (from-to)	1803-1810
Number of pages	8
Journal	Crystal Growth and Design
Volume	7
Issue number	9
DOIs	https://doi.org/10.1021/cg070226e
State	Published - Sep 2007

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

abstract = "An initial solvent screening technique using 23 kinds of common organic solvents was utilized to engineer the polymorphism and crystallinity of the solids of organic electroluminescent molecules of tris(8-hydroxyquinoline) aluminum(III) (Alq3). Pure Alq3 recrystallized from N,N-dimethyl formamide (DMF) by temperature cooling from 60 to 25°C gave rodlike, semicrystalline solid materials with traces of δ-form having a sublimation point of only around 200 ± 5°C. The sublimation point depression of source materials could reduce the current evaporation temperature of organic hght-emitting diodes (OLEDs) drastically. In addition, three new solvates of Alq3(C 6H5NO2) 1/5(H2O)6, Alq3(CHCl3)1/4, and Alq3(C 4H8O2)1/2 were discovered from the initial solvent screening.",

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N2 - An initial solvent screening technique using 23 kinds of common organic solvents was utilized to engineer the polymorphism and crystallinity of the solids of organic electroluminescent molecules of tris(8-hydroxyquinoline) aluminum(III) (Alq3). Pure Alq3 recrystallized from N,N-dimethyl formamide (DMF) by temperature cooling from 60 to 25°C gave rodlike, semicrystalline solid materials with traces of δ-form having a sublimation point of only around 200 ± 5°C. The sublimation point depression of source materials could reduce the current evaporation temperature of organic hght-emitting diodes (OLEDs) drastically. In addition, three new solvates of Alq3(C 6H5NO2) 1/5(H2O)6, Alq3(CHCl3)1/4, and Alq3(C 4H8O2)1/2 were discovered from the initial solvent screening.

AB - An initial solvent screening technique using 23 kinds of common organic solvents was utilized to engineer the polymorphism and crystallinity of the solids of organic electroluminescent molecules of tris(8-hydroxyquinoline) aluminum(III) (Alq3). Pure Alq3 recrystallized from N,N-dimethyl formamide (DMF) by temperature cooling from 60 to 25°C gave rodlike, semicrystalline solid materials with traces of δ-form having a sublimation point of only around 200 ± 5°C. The sublimation point depression of source materials could reduce the current evaporation temperature of organic hght-emitting diodes (OLEDs) drastically. In addition, three new solvates of Alq3(C 6H5NO2) 1/5(H2O)6, Alq3(CHCl3)1/4, and Alq3(C 4H8O2)1/2 were discovered from the initial solvent screening.

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

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