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EPR, ENDOR and TRIPLE Resonance of Amino-Substituted 9,10-Anthraquinone Radicals and the Rotation of the Amino Groups in the Solution Phase

✍ Scribed by Jussi Eloranta; Virpi Vatanen; Antti Grönroos; Mikko Vuolle; Reijo Mäkelä; Hilkka Heikkilä

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
394 KB
Volume
34
Category
Article
ISSN
0749-1581

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✦ Synopsis

EPR, ENDOR and TRIPLE resonance spectra were recorded for 1-amino-9,lO-anthraquinone (1-aminoAQ), 2-aminoAQ, 1,2-diaminoAQ, 1,4-diaminoAQ, 1,5diaminoAQ and 2,CdiaminoAQ anion radicals in the solution phase. The rotation of the amino groups is discussed with reference to the experimental data. Rotation barrier calculations were carried out using B3PW91/3-21G* density functional method. The amino groups at positions 1, 4,5,8 were found not to be in rotational movement up to the EPR time-scale.

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