双氮桥联菲咯啉大环化合物的均相配位反应

通过难溶双氮桥联菲咯啉大环化合物H2HAPP的三氟醋酸盐在混合溶剂中的去质子化反应制备了该大环化合物的均相溶液，并且获得了该大环化合物的高分辨率紫外-可见光谱．利用pH滴定法研究了H2HAPP在二氯甲烷／甲醇(体积比为1：1)混合溶剂中的质子化反应．结果表明，该大环化合物环外的两个氮原子可以在不同pH值下分别被质子化．光谱滴定实验结果显示，在二氯甲烷／甲醇溶液体系中，Co^2 、Cu^2 和Zn^2 均容易与双氮桥联菲咯啉大环化合物进行均相配位反应．

Homogeneous Coordination Reaction of Aza-bridged Bis-phenanthroline Macrocycle

The homogeneous solution of poor soluble aza-bridged bis-phenanthroline macrocycleH2HAPP was obtained via the deprotonation of its trifluoroacetate in a mixed solvent, and the highresolved UV-Vis spectra of H2HAPP were recorded in solution. Protonation reaction of H2HAPP inCH2CH3/CH3OH solvent (the volume ratio of CH2C12 to CH3OH is 1 :1) was studied via pH titration.The results indicate that the two outer nitrogen atoms of HAHAPP are protonized independently withdifferent pH values. Spectroscopic titration result shows that the coordination reaction between thismacrocyclic ligand and metal ions (Co2+, Cu2+ and Zn2+) goes smoothly in such a homogeneoussystem.