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Photoinduced Electron Transfer between Styrylanthracenes and Electron Donors and Acceptors in Acetonitrile

DOI: 10.1039/FT9928800029

Source and publish data:

Journal of the Chemical Society - Faraday Transactions p. 29 - 34 (1992)

Update date:2022-08-23

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Authors:

Goerner, HelmutGoerner, Helmut

Elisel, FaustoElisel, Fausto

Aloisi, Gian GaetanoAloisi, Gian Gaetano

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Article abstract of DOI:10.1039/FT9928800029

The decay pathways of the lowest singlet and triplet excited states (1trans* and 3trans*) of trans-n-styrylanthracenes (n-StA, where n = 1, 2 or 9 on the anthracene) have been studied in acetonitrile at room temperature.Fluorescence lifetimes (τF) and quantum yields (ΦF), as well as the yield and spectral and kinetic properties of the lowest triplet state of the three StAs, were determined by steady-state and transient techniques.The formation and the decay of the respective StA radical cations (trans.*) were observed by laser flash photolysis; the yield of photoionization is ca. 0.07 on 353 nm excitation and is enhanced by fluorescence quenching with 1,4-dicyanobenzene.The formation and decay of the StA radical anions (trans-*) in the presence of diethylaniline (DEA) is concluded from transient conductivity (Δκ) and optical results, DEA significantly enhances the yield of trans*- and the initial amplitude of Δκ and correspondingly quenches ΦF.The bimolecular interaction between 1trans* and 4-bromodimethylaniline enhances the triplet population.

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Product name:Anthracene, 1-(2-phenylethenyl)-, (E)-

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