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Acid‐base equilibria of dipyridylethylenes studied by absorption and fluorescence spectrometry
Author(s) -
Beggiato G.,
Favaro G.,
Mazzucato U.
Publication year - 1970
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570070317
Subject(s) - chemistry , protonation , fluorescence , mass spectrometry , dissociation (chemistry) , ion , absorption (acoustics) , analytical chemistry (journal) , dissociation constant , fluorescence spectrometry , base (topology) , photochemistry , chromatography , organic chemistry , mathematical analysis , mathematics , quantum mechanics , acoustics , biochemistry , physics , receptor
In connection with photochemical and fluorimetric studies and with previous p K measurements on styrylpyridines, the acid‐base equilibria of the trans ‐1,2‐dipyridylethylenes have been studied by absorption and fluorescence spectrometry. The results obtained by the two methods are compared and the p K 's of first and second protonation discussed in dependence with the nitrogen positional isomerism. The measurements of the dissociation constant of the trans ‐3‐styrylpyridinium ion is also reported as a particularly convenient application of fluorescence spectrometry.