Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5400120 | Journal of Luminescence | 2013 | 5 Pages |
Abstract
Rutin is one of the most promising flavonoid from a pharmacological and biochemical point of view. Here we have explored its spectroscopic and photophysical properties at room temperature and 77 K using steady-state absorption-luminescence methods and pulse spectroscopy equipment. By excitation into the absorption band 1 of rutin in methanol at room temperature the normal Stokes׳ shifted fluorescence with a maximum at 415 nm and quantum yield of 2Ã10â4 was revealed. However, by excitation into the bands 2 and 3 any emission wasn't observed. At 77 K in ethanol glass we have observed fluorescence at 410 nm and phosphorescence at 540 nm for the first time. As a result the adequate energetic scheme including the lowest electronic excited singlet at 26000 cmâ1 and triplet at 19600 cmâ1 states was proposed.
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Authors
Stanislav L. Bondarev, Valeri N. Knyukshto,