Fe-TPPS_3配合物电化学研究(Ⅱ)

Studies on the Electrochemistry of Fe-TPPS 3 Complexes

用吸收光谱法和单扫描极谱法研究了Ｆｅ２＋与三磺基四苯基卟啉（ＴＰＰＳ３）水溶性配合物在５．２＜ｐＨ＜５．９的ＨＡｃ－ＮａＡｃ底液中的性质。实验表明Ｆｅ２＋与ＴＰＰＳ３在该介质条件下，９０℃加热１５ｍｉｎ即可反应完全，确定了产物的组成比为１：１；Ｈ＋参与了这种电活性配合物的电极反应，ｐＨ对电活性物质的还原峰电流和峰电位影响明显；在ＴＰＰＳ３过量情况下，还原峰电流与Ｆｅ２＋的浓度成正比，可作为一种测定铁的新方法。

The properties of water soluble complexes of Fe 2+ and TPPS 3 in the pH=5.2～5.9 HAc-NaAc buffer have been studies by the absorption spectroscopy and scanning porlarography.The results obtained shown that Fe 2+ and TPPS 3 would react completely in 15 min. at 90℃;H + partakes in the electrode reaction ;The composition ratio of the electrical activity complex is Fe: TPPS 3=1:1.The peak current of the electrical active complex reduced is proportional to the Fe 2+ comcentration .