新型吡啶卟啉季铵盐的合成及其与铜(Ⅱ)显色反应的研究

Synthesis of New Pyridine Porphyrin Quaternary Ammonium Salt and Study of Their Color Reaction with Copper(Ⅱ)

合成了溴化5-[4-（N-十六烷基）吡啶基]10，15，20-（4-吡啶基）卟啉，探索了其合成、分离及纯化的方法．新的卟啉试剂与铜（Ⅱ）显色反应的结果表明：在酸性介质中，沸水浴加热20min形成1：1的络合物，在0～120μg／L范围内吸光度与铜质量浓度的关系符合比尔定律，该方法用于环境水样中铜离子的分析，结果令人满意。

Brominate-5- [ 4- （ N-eetryl ） pyridyl ] 10,15,20- （ 4-pyridyl ） porphyrin is synthesized and characterized by I HNMR, UV, IR and MS. It is used as color reagent in determination of Cu^2＋. The results show that the complex ratio is 1 ： 1 in the solution of pH = 3.2 and the temperature of color reaction is 100 ℃ and time is 20 rain. Beer＇ s law is obeyed in the range of 0 - 120μg/L for Cu（ Ⅱ ）. This method has good selectivity and sensitivity. It has been used in the speetrophotometrie determination of micro copper in envi- ronmental water sampleswith satisfactory results.