论文部分内容阅读
本文研究了Ｐｂ（Ⅱ）－５－Ｂｒ－ＰＡＤＡＰ及Ｚｎ（Ⅱ）－５－Ｂｒ－ＰＡＤＡＰ络合反应体系的吸收光谱，用基于Ｒｏｓｅｎｂｒｏｃｋ算法的最优化程序处理了光度测量数据，发现Ｐｂ（Ⅱ）与５－Ｂｒ－ＰＡＤＡＰ形成１：１络合物，稳定常数ｌｇβ＿１＝１１．２１，摩尔吸光系数ε＿１＝６．２×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）；Ｚｎ（Ⅱ）在ｃ＿Ｌ＞ｃ＿Ｍ的条件下主要形成１：２络合物，ｌｇβ＿２＝２２．３６，ε＿２＝１．２８×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。
The absorption spectra of Pb (Ⅱ) -5-Br-PADAP and Zn (Ⅱ) -5-Br-PADAP complexes were studied in this paper. The photometric data were processed by the optimization program based on Rosenbrock algorithm. ) Formed a 1: 1 complex with 5-Br-PADAP, with a constant lgβ_1 = 11.21 and a molar absorptivity of ε_1 = 6.2 × 10-4L · mol -1 (-1) cm -1. Zn (Ⅱ) mainly forms 1: 2 complex under the condition of c_L> c_M, lgβ_2 = 22.36, ε_2 = 1.28 × 10 ~ 5L · mol -1 (-1) cm -1.