Synthesis and Characterization of Cerium Tetraphenylporphyrin Nitrate and Molecular Recognition for NO

Cerium (III) tetraphenylporphyrin nitrate Ce(TPP)NO₃ was synthesized by using meso-tetraphenylporphyrin (TPP) and Ce(NO₃)·6H₂O in mixture solution of CHCl₃ and C₂H₅OH (V :V =1:1). The complex was characterized by UV-Vis, FT-IR, conventional uorescence, MALDI-TOF-MS, and ¹H NMR spectral techniques. The structure of complex was pro-posed viaSpectral analyses, in which tetraphenylporphyrin was coordinated to a cerium ion in a tetradentate fashion, while one nitrate was coordinated to the same cerium ion. Af-ter bubbling NO to the solution of Ce(TPP)NO₃ in CH₂Cl₂, spectral analyses suggested that Ce(TPP)NO₃ could interact with NO to form a novel complex of Ce(TPP)(NO)NO₃, and NO was coordinated to the center cerium ion. When nitrogen was poured into the Ce(TPP)(NO)(NO₃) solution, the complex could be reduced to Ce(TPP)NO₃.