四苯基(2-硝基)卟啉金属配合物的XPS研究

XPS Studies of Tetraphenyl-2-Nitro-porphyrin Metal Complexes

用XPS研究了四苯基(2-硝基)卟啉及其过渡金属化合物。由π→π跃迁能、跃迁几率及N_(1S)和金属M_(2p3/2)结合能的位移证明,这些化合物是金属镶嵌在大π体系共轭环中而成的金属配合物。其中,—NO_2是连在卟啉环上。引入—NO_2后,金属结合能升高,Lewis酸性增强,因而与轴向配位体的加合能力增强。

The metal Complexes coordinated with tetrapbenyl porphyrin and tetraphenyl-2-nitroporphyrin were investigated by XPS. These metal complexes in which ions were mosaiced into big ? system of conjugated ring structrue were demonstrated by π→π* transition energy, transition probability and Nlt shift of binding energy. Furthermore, it was proved that -NO3 group is in conjunction with a pyrrole ring and this leads to an increase of Lewis acidity.