Copper(II)-Assisted Degradation of Pheophytin a by Reactive Oxygen Species
Łukasz Orzeł,
Agnieszka Drzewiecka-Matuszek,
Dorota Rutkowska-Zbik
et al.
Abstract:The central ion Mg2+ is responsible for the differences between chlorophyll a and its free base in their reactivity toward metal ions and thus their resistance to oxidation. We present here the results of spectroscopic (electronic absorption and emission, circular dichroism, and electron paramagnetic resonance), spectroelectrochemical, and computational (based on density functional theory) investigations into the mechanism of pheophytin, a degradation that occurs in the presence of Cu ions and O2. The processe… Show more
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