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IUPAC name Tris(8-hydroxyquinolinato)aluminium
Other names 8-Hydroxyquinoline aluminum salt, Alq3, Aluminum 8-hydroxyquinolinate, Aluminum oxinate,
CAS number 2085-33-8
Molecular formula C27H18AlN3O3
Molar mass 459.43
Melting point

>300 °C

Solubility in water insol in water
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and 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. Both the meriodonal and facial isomers are known as well as several polymorphs (different crystalline forms).[1] The compound is prepared by the reaction of 8-hydroxyquinoline with aluminium(III) sources[2]

Al3+ + C9H6NOH → Al(C9H6NO)3 + 3 H+

Alq3 is a common component of organic light-emitting diodes (OLED's). Variations in the substituents on the quinoline rings affect its luminescence properties.[3]


  1. ^ Michael Cölle, Robert E. Dinnebier and Wolfgang Brütting "The structure of the blue luminescent -phase of tris(8-hydroxyquinoline)aluminium(III) (Alq3)" Chemical Communications 2002, pp. 2908-9. DOI: 10.1039/b209164j.
  2. ^ Katakura, R.; Koide, Y. “Configuration-Specific Synthesis of the Facial and Meridional Isomers of Tris(8-hydroxyquinolinate)aluminum (Alq3)” Inorganic Chemistry 2006 volume 45,pp 5730-5732. DOI: 10.1021/ic060594s.
  3. ^ Victor A. Montes, Radek Pohl, Joseph Shinar, Pavel Anzenbacher Jr. "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 2006, Volume 12, pp. p 4523-4535. DOI: 10.1002/chem.200501403
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Tris(8-hydroxyquinolinato)aluminium". A list of authors is available in Wikipedia.
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