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Protonation of porphyrins in liquid PVC membranes: Effects of anionic additives and application to pH-sensing

Papkovsky, Dmitri B. ; Ponomarev, Gelii V. ; Wolfbeis, Otto S.
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Date of publication of this fulltext: 18 Jul 2011 10:15


We report on a study on the protonation of representative porphyrins, metalloporphyrins, porphyrin-ketones and a Pd-porphyrin Schiff base in aqueous solution and when dissolved in plasticized PVC membranes. The respective protolytic forms were characterized by absorption and emission spectra as well as apparent pKa values. It is shown that the protonation of porphyrins dissolved in PVC membranes ...


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