Characterization of the Triplet State of Tris(8-hydroxyquinoline)aluminium(III) in Benzene Solution
作者： Hugh D. Burrows , Mariana Fernandes , J. Seixas de Melo , Andrew P. Monkman , Suppiah Navaratnam
DOI: 10.1021/JA037254F
关键词: Quantum yield 、 Ethyl iodide 、 Triplet state 、 Chemistry 、 Singlet oxygen 、 Photodissociation 、 Flash photolysis 、 Photochemistry 、 Radiolysis 、 Benzophenone
摘要: The lowest triplet state of tris(8-hydroxyquinoline)aluminium(III) (Alq3) has been prepared by pulse radiolysis/energy transfer from appropriate donors in benzene solutions and an absorption maximum around 510 nm with a lifetime about 50 μs. It is quenched molecular oxygen, leading to singlet oxygen formation. From flash photolysis formation measurements, quantum yield 0.24 was determined for direct the complex. A value 2.10 ± 0.10 eV energy studies confirmed phosphorescence measurements on Alq3, either heavy atom solvent ethyl iodide or photosensitized benzophenone benzene. Dexter (exchange) observed Alq3 platinum(II) octaethylporphyrin.
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