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卟啉化合物作为高灵敏度的显色剂已引起广泛重视,但美中不足的是它与金属离子络合速度迟缓。一些分析工作者试图改善与解决这一问题,曾先后进行了加快络合反应速度的研究并取得了一定成效。目前研究工作大体上有如下几个方面。改变取代基以加快络合反应速度。Buckingham将取代基-NHCO(?)CO_2H导入四苯基卟啉的各个酚基中,发现在水—二甲基甲酰胺介质中,Cu~(2+)、Zn~(2+)、CO~(2+)、Ni~(2+)被迅速络合。最近,Cole将长链烷基(C_(10)～C_(16))导入四苯基卟啉的酚基中,测定
Porphyrin compounds have attracted wide attention as high sensitivity color developers, but the only drawback is that they are slow to complex with metal ions. Some analysts tried to improve and solve this problem. They conducted research on speeding up of the complexation reaction and achieved some success. The current research generally has the following aspects. Change the substituents to speed up the complexation reaction. Buckingham introduced the substituent -NHCO (?) CO_2H into each phenolic group of tetraphenylporphyrin and found that in Cu (2 +), Zn ~ (2 +), CO ~ (2 +), Ni ~ (2+) is rapidly complexed. Recently, Cole introduced long chain alkyl (C_ (10) ~ C_ (16)) into the phenolic group of tetraphenylporphyrin,