Title | Protonation of porphocyanine - A new expanded tetrapyrrolic macrocycle |
Publication Type | Journal Article |
Year of Publication | 1995 |
Authors | Xie, LY, Dolphin, D |
Journal | Canadian Journal of Chemistry-Revue Canadienne De Chimie |
Volume | 73 |
Pagination | 2148-2152 |
Date Published | Dec |
Type of Article | Article |
ISBN Number | 0008-4042 |
Keywords | ACIDS, octaethylporphocyanine, Octaethylporphyrin, PORPHOCYANINE, protonation |
Abstract | The porphocyanine nucleus contains six nitrogen atoms, four of which are theoretically capable of accepting a proton in acidic solution. However, only the monoprotonated and diprotonated forms have been observed. These two forms were characterized by their visible and fluorescence spectra. pK(a) values of 6.0 +/- 0.1 and 4.4 +/- 0.1 were determined by spectrophotometric titration. The monoprotonated monocationic form can be observed in methanol. |
URL | <Go to ISI>://A1995TV23200007 |
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