Characterization of the Triplet State of Tris(8-hydroxyquinoline)aluminium(III) in Benzene Solution | Zendy

Hugh D. Burrows | Zendy; Mariana Fernandes | Zendy; J. Sérgio Seixas de Melo | Zendy; Andrew P. Monkman | Zendy; Suppiah Navaratnam | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Characterization of the Triplet State of Tris(8-hydroxyquinoline)aluminium(III) in Benzene Solution

Author(s) -

Hugh D. Burrows,

Mariana Fernandes,

J. Sérgio Seixas de Melo,

Andrew P. Monkman,

Suppiah Navaratnam

Publication year - 2003

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/ja037254f

Subject(s) - chemistry , phosphorescence , flash photolysis , triplet state , photochemistry , benzophenone , singlet oxygen , singlet state , 8 hydroxyquinoline , benzene , quantum yield , solvent , oxygen , excited state , inorganic chemistry , molecule , fluorescence , reaction rate constant , organic chemistry , physics , quantum mechanics , nuclear physics , kinetics

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 mus. 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.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research