Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 9, Issue 12, Pages 2751-2754Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2007.09.010
Keywords
electrochemical anion sensing; porphyrinogen; cathodic shift; recognition
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The effect of anion binding on the oxidation potential of an anion receptor, N-21,N-23-dibenzyl-5,10,15,20-(3,5-di-t-butyl-4-oxo-cyclohexa-2,5-dienylidene)porphyrinogen, 1 in o-dichlorobenzene is reported. The anion binding site of 1, at its inner pyrrolic amine hydrogens, is an integral part of the highly conjugated macrocycle, thus predicting larger potential shifts upon anion binding. Accordingly, cathodic shifts up to 600 mV are observed upon anion binding and such potential shifts correlate well with the anion binding constants. (C) 2007 Elsevier B.V. All rights reserved.
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