In:
Journal of Porphyrins and Phthalocyanines, World Scientific Pub Co Pte Ltd, Vol. 21, No. 04-06 ( 2017-04), p. 426-430
Abstract:
Acid-base properties of tetra-anionic zinc meso-5,10,15,20-tetrakis-(4-sulfonatophenyl)porphyrin (ZnTPPS) in presence of cationic and anionic polyelectrolytes are studied by UV-visible spectroscopy. In fact, spectral modifications related to the out-of-plane deformation of porphyrins after protonation allow for an easy probing of the protonation event that, in presence of a metal derivative, requires a deprotonation step. Interactions with poly-D-glutamate and poly-L-lysine, modulated by system electrostatics and by the presence of an axially-coordinated central metal ion, trigger both protonation occurrences as well as porphyrin self-aggregation. The crucial role of electrostatic interactions experienced by the metalated inner core in strong acid solution, probed by UV-visible spectroscopy, are discussed.
Type of Medium:
Online Resource
ISSN:
1088-4246
,
1099-1409
DOI:
10.1142/S1088424617500432
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2017
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