Optical and redox properties of ruthenium phthalocyanine complexes tuned with axial ligand substituents

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Journal Article
Inorganic Chemistry, 2007, 46 (7), pp. 2805 - 2813
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The optical and electrochemical properties of the ruthenium phthalocyanine complexes [{(t-Bu)4Pc}Ru(4-Rpy)2], where R = NO 2, Me, NH2, and NMe2, are reported. The electron density at the macrocycle may be adjusted using the axial ligand substituents, which have varying electron-donating/withdrawing strengths. Electrochemical data show that the axial pyridine ligand substituents exert significant influence over the phthalocyanine ring-based redox processes. The axial ligands also influence the electronic absorption properties of the complexes with influence also being observed in the electrogenerated oxidized and reduced species. © 2007 American Chemical Society.
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