Essential Results and Conclsuions of 2-Methyl anthraquinone
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The article involves detailed investigations into the photophysical, photochemistry and photopolymerisation properties of 4 commercial derivatives of 2-substituted anthraquinone, namely, 2-Bromomethylanthraquinone (2BA), 2 Chloromethylanthraquinone (2CA), 2 Ethylanthraquinone (2EA), 2 Hydroxymethylanthraquinone (2HA) and one novel synthesized anthraquinone, 2 Acryloxymethylanthraquinone (2AA).

Detailed spectroscopic analysis has been undertaken for the first time on the 2-mthylanthraquinone compounds.

Photopolymerisation activities have been measured and correlated with the excited state characteristics of the anthraquinones to provide important information on the nature of the excited states responsible for their behaviour.

Hydrogen atom abstraction to give semiquinone radicals and radical anions via electron transfer has been established.

In the presence of an amine, triethylamine, all anthraquinone derivatives show the formation of the stable species related to either the exciplex or the radical ion pair.

Relative to benzophenone, the molar absorption coefficient, ¦Å, and quantum yield of intersystem crossing, ¦µisc were calculated, and it is summarised that the value for ¦µisc for all compound is less than 1.00 and controls to a major extent their photochemical activities.

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