Tris(8-hydroxyquinolinato)aluminium
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| Template:Longitem | C27H18AlN3O3 |
| Molar mass | 459.43 |
| Appearance | Yellow powder |
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Tris(8-hydroxyquinolinato)aluminium is the chemical compound with the formula Al(C9H6NO)3. Widely abbreviated Alq3, it is a coordination complex wherein aluminium is bonded in a bidentate manner to the conjugate base of three 8-hydroxyquinoline ligands.
Structure
Both the meridional and facial isomers are known as well as several polymorphs (different crystalline forms).[1]
| File:Mer-tris(8-hydroxyquinoline)aluminium(III)-from-xtal-2000-CM-3D-ellipsoids.png | File:Fac-tris(8-hydroxyquinoline)aluminium(III)-from-xtal-2003-CM-3D-ellipsoids.png |
| Thermal ellipsoid model of mer-Alq3[2] | Thermal ellipsoid model of fac-Alq3[3] |
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Synthesis
The compound is prepared by the reaction of 8-hydroxyquinoline with aluminium(III) sources[4]
- Al3+ + 3 C9H7NO → Al(C9H6NO)3 + 3 H+
Applications
Alq3 is a common component of organic light-emitting diodes (OLEDs). Variations in the substituents on the quinoline rings affect its luminescence properties.[5]
References
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