Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/10446
Title: Characterization of the Triplet State of Tris(8-hydroxyquinoline)aluminium(III) in Benzene Solution
Authors: Burrows, Hugh D. 
Fernandes, Mariana 
Melo, J. Seixas de 
Monkman, Andrew P. 
Navaratnam, Suppiah 
Issue Date: 17-Dec-2003
Publisher: American Chemical Society
Citation: Journal of the American Chemical Society. 125:50 (2003) 15310-15311
Abstract: 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 has an absorption maximum around 510 nm with a lifetime of about 50 μs. It is quenched by molecular oxygen, leading to singlet oxygen formation. From flash photolysis and singlet oxygen formation measurements, a quantum yield of triplet formation of 0.24 was determined for direct photolysis of the complex. A value of 2.10 ± 0.10 eV was determined for the energy of the lowest triplet state by energy transfer studies and was confirmed by phosphorescence measurements on Alq3, either in the heavy atom solvent ethyl iodide or photosensitized by benzophenone in benzene. Dexter (exchange) energy transfer was observed from triplet Alq3 to platinum(II) octaethylporphyrin.
URI: http://hdl.handle.net/10316/10446
ISSN: 0002-7863
DOI: 10.1021/ja037254f
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

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