具有π共轭骨架的Salen-卟啉型同、异双核配合物的合成及谱学性质

Two new types of Salen-porphyrin ligand and metal complexes with π-conjugate configurations were synthesized. The mono- and bi-nuclear nickel Salen-porphyrin complexes were synthesized from half Salen-porphyrin ligands and the corresponding aldehyde by metal templating. Based on the mononuclear nickel Salen-porphyrin complexes, the heterobinuclear nickel, zinc Salen-porphyrin complexes were synthesized. All the compounds were characterized by proton nuclear magnetic resonance (1H NMR), ultraviolet-visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, electron spray ionization mass spectrometry (ESI-MS), and fluorescence spectroscopy. These results indicate that the nickel ion is located in the cavity of the Salen part, while the zinc ion is located in the center of the porphyrin part of the mononuclear nickel and heterobinuclear nickel-zinc Salen-porphyrin complexes. The circumfluent effect of the porphyrin and the π-conjugate configuration resulted in the chemical shifts of the hydrogen atoms moving to a higher or lower field. The positions of the Soret and Q bands in the UV-Vis spectrum of the porphyrin change after the metal ion coordinated. Furthermore, the fluorescence quenched due to the metal ion.