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Protolytic Properties of Phenols Related to Lignin in Electronically Excited States

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N.S. Gorbova, K.G. Bogolitsyn

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UDС

544.362:544.51

DOI:

Annotation

The acidity constants of some guaiacylic phenols, modeling the lignin macromolecule structural fragments in electronically excited (pKa*) were obtained using the methods of electronic absorption and luminescence spectroscopy methods based on the Foerster cycle. A significant decrease of pKa values of lignin related phenols under photoexcitation correlating with the properties of para-substitute towards phenolic hydroxyl group is shown.

Authors

N.S. Gorbova, K.G. BogolitsynInstitute of Ecological Problems of the North, Ural Branch, Russian Academy of Sciences
D.S. Kosyakov, Arkhangelsk State Technical University

Authors job

1Institute of Ecological Problems of the North, Ural Branch, Russian Academy of Sciences  2Arkhangelsk State Technical University

Keywords

lignin, phenols, electronically excited state, fluorescence, acidity constants.

Protolytic Properties of Phenols Related to Lignin in Electronically Excited States

 

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