Tris(8-hydroxyquinolinato)aluminium

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What Wikipedia says

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.

Excerpt from the Wikipedia article “Tris(8-hydroxyquinolinato)aluminium”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Roland Mattern, CC BY 3.0, via Wikimedia Commons.