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一般水溶性金属卟啉络合物要在溶液加热或有某种催化剂存在下才能形成。本文报道将乙酸缓冲液中的meso-四(4-磺基苯基)卟啉(TPPS_4)预先吸附于汞滴电极,取出电极,洗净,插入仅含Cu~(2+)的相同底液中,在单扫伏安图上就可得到Cu-TPPS_4络合物的还原峰。利用峰高可测定微量铜以及研究络合物的电化学行为。同样,在氨性底液中,吸附了卟啉的汞滴电极插入含Cd~(2+)、Zn~(2+)、Co~(2+)、Mn~(2+)等离子的溶液中,也可快速地得到相应的络合物还原峰。这是一个简便且重现性很好的形成和研究金属卟啉络合物的新方法。
General water-soluble metalloporphyrin complexes in the solution is heated or in the presence of a catalyst to form. In this paper, meso-tetrakis (4-sulfophenyl) porphyrin (TPPS_4) in acetic acid buffer was pre-adsorbed on the mercury drop electrode, the electrode was removed, washed and inserted into the same bottom solution containing only Cu 2+ , The reduction peak of Cu-TPPS_4 complex can be obtained on a single sweep voltammogram. The use of peak height can be measured trace amounts of copper and the electrochemical behavior of the complex. Similarly, in the ammonia solution, the mercury droplet electrode with adsorbed porphyrin was inserted into the solution containing Cd ~ (2 +), Zn ~ (2 +), Co ~ (2 +) and Mn ~ (2+) , But also can quickly get the corresponding complex reduction peak. This is a simple and reproducible method of forming and studying new metalloporphyrin complexes.