Tris(8-hydroxyquinolinato)aluminium
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| Names | |
|---|---|
| IUPAC name
Tris(8-hydroxyquinolinato)aluminium | |
| Other names
8-Hydroxyquinoline aluminium salt, Alq3, aluminium 8-hydroxyquinolinate, aluminium oxinate, | |
| Identifiers | |
2085-33-8  | |
| 3D model (Jmol) | Interactive image |
| ChemSpider | 21106485 |
| ECHA InfoCard | 100.016.570 |
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| Properties | |
| C27H18AlN3O3 | |
| Molar mass | 459.43 |
| Appearance | Yellow powder |
| Melting point | > 300 °C (572 °F; 573 K) |
| insoluble in water | |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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| Infobox references | |
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]
aluminium(III)-from-xtal-2000-CM-3D-ellipsoids.png) | aluminium(III)-from-xtal-2003-CM-3D-ellipsoids.png) |
Synthesis
The compound is prepared by the reaction of 8-hydroxyquinoline with aluminium(III) sources[4]
- Al3+ + 3 C9H6NOH → Al(C9H6NO)3 + 3 H+
Applications
Alq3 is a common component of organic light-emitting diodes (OLED's). Variations in the substituents on the quinoline rings affect its luminescence properties.[5]
References
- ↑ Cölle, M.; Dinnebier, R. E.; Brütting, W. (2002). "The structure of the blue luminescent δ-phase of tris(8-hydroxyquinoline)aluminium(III) (Alq3)". Chemical Communications. 2002 (23): 2908–9. doi:10.1039/b209164j. PMID 12478807.
- ↑ Brinkmann, M.; Gadret, G.; Muccini, M.; Taliani, C.; Masciocchi, N.; Sironi, A. (2000). "Correlation between Molecular Packing and Optical Properties in Different Crystalline Polymorphs and Amorphous Thin Films of mer-Tris(8-hydroxyquinoline)aluminum(III)". J. Am. Chem. Soc. 122 (21): 5147–57. doi:10.1021/ja993608k.
- ↑ Rajeswaran, M.; Blanton, T. N.; Klubek, K. P. (2003). "Refinement of the crystal structure of the δ-modification of tris(8-hydroxyquinoline)aluminum(III), δ-Al(C9H6NO)3, the blue luminescent Alq3". Zeitschrift für Kristallographie NCS. 218 (4): 439–40. doi:10.1524/ncrs.2003.218.jg.471.
- ↑ Katakura, R.; Koide, Y. (2006). "Configuration-Specific Synthesis of the Facial and Meridional Isomers of Tris(8-hydroxyquinolinate)aluminum (Alq3)". Inorg. Chem. 45 (15): 5730–2. doi:10.1021/ic060594s. PMID 16841973.
- ↑ Montes, V. A.; Pohl, R.; Shinar, J.; Anzenbacher, P. Jr. (2006). "Effective Manipulation of the Electronic Effects and Its Influence on the Emission of 5-Substituted Tris(8-quinolinolate) Aluminum(III) Complexes". Chemistry: A European Journal. 12 (17): 4523–35. doi:10.1002/chem.200501403. PMID 16619313.
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