| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1235469 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2011 | 5 Pages |
Abstract
⺠We studied the protolytic dissociation of 3,4-dicyanophenol and o-, m- and p-cyanophenol in ground and excited electronic states in alcohols. ⺠The acidic dissociation constant of 3,4-dicyanophenol in the ground state in water was calculated. ⺠The change of acidity constants in the excited state in comparison to the ground state for all investigated compounds in alcohol and water solutions was obtained. ⺠3,4-Dicyanophenol is a stronger acid in ground state in comparison to ortho-, meta- and p-cyanophenol. ⺠In the excited state the acidity of investigated cyanophenols in methanol strongly increases: the change of pKa is â¼â8.5 for dicyano- and about â7 for o- and m-derivatives.
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Physical Sciences and Engineering
Chemistry
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Authors
Beata Szczepanik, StanisÅaw Styrcz,