D. Sen, C. Wells
1980
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0
Influential Citations
2
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Journal
Journal name not available for this finding
Abstract
Abstract The fluorescence, phosphorescence and absorption spectra of 5,6-dimethyl-2-dimethyl-amino-4-hydroxypyrimidine (1), 5- n -butyl-2-dimethylamino-4-hydroxypyrimidine (2), and 5- n -butyl-2-ethylamino-4-hydroxypyrimidine (3) have been obtained in organic media and in aqueous solution at different pH values. The spectra reveal that the pyrimidines exist principally as cations at low pH, neutral species at pH values around 7 and as anions at high pH. The p K values for the ground state of compounds (1)–(3) have been measured as have the p K * values for the first excited singlet state.