叶绿素的电化学行为研究Ⅱ去镁叶绿素和铜－叶绿素的伏安行为研究

在文Ⅰ中报道了叶绿素（Ch1）的电化学分析方法并讨论了叶绿素a、b的电还原机理。本篇报道去镁叶绿素（pheophytins）和它的一种金属叶绿素（CuCh1）的电化学行为。在水溶液（含0.3%丙酮）中，Pheo有与卟啉（TPPS, TMPyP）相似的一步还原波，而铜－叶绿素又有与CuTPPS相似的络合物还原波。金属叶绿素环Ⅴ上的羰基仍是活性还原部位。

Studies on the Electrochemical Behaviors of Chlorophyll (II) Voltammetric Behavior of Pheophytins and Cu-Chla

In the present investigation, the reductive behaviors of pheophytins a and b in 0.1 mol/L HAc-NaAc solution was studied by first step reversible 2e^-, 2H⁺ peak similar to that of water-soluble porphyrins such as TPPS and TMPyP. The Cu-Chla has a similar step of irreversible (4e^-, 2H⁺)reduction peak to that of CuTPPS. While the reduction of the carbonyl group in the molecule remains the same.