Diiron propanedithiolate complex bearing the pyridyl-functionalized phosphine ligand axially coordinated to a photosensitizer zinc tetraphenylporphyrin

摘要

Treatment of the starting material (μ-PDT)Fe_2(CO)_6 (PDT = SCH_2CH_2CH_2S) with 4- diphenylphosphinoaminopyridine (PyNHPPh2) in the presence of the decarbonylating agent Me_3NO·2H_2O afforded (μ-PDT)Fe_2(CO)_5(PyNHPPh_2) (1) in 56% yield. Further treatment of 1 with Zinc tetraphenylporphyrin (ZnTPP) yielded the target light-driven model compound (μ-PDT)Fe_2(CO) _5(PyNHPPh_2)(ZnTPP) (2) in 94% yield. The new complexes 1 and 2 were characterized by elemental analysis, NMR, IR, and X-ray crystallography. The molecular structure of 2 revealed its precursor 1 and a photosensitizer ZnTPP joined together through axial coordination. Furthermore, the fluorescence emission spectra and electrochemistry were also investigated.