Journal
INORGANIC CHEMISTRY
Volume 42, Issue 25, Pages 8377-8384Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ic034691m
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The synthesis and characterization of mixed ligand 2,2';6',2-terpyridine (tpy) ruthenium complexes with 2,6-bis-([1,2,4]triazol-3-yl)pyridine, 2,6-bis(5-phenyl-[1,2,4]triazol-3-yl)pyridine, and 2,6-bis([1,2,3,4]tetrazol-5-yl)pyridine are reported. The species are characterized by HPLC, H-1 NMR, UV/vis, and emission spectroscopy. The photophysical properties of the complexes are investigated as a function of temperature over the range 80-320 K. The emission lifetime observed for the fully deprotonated compounds at room temperature is about 80 ns. This increase by 2 orders of magnitude with respect to the parent [Ru(tpy)(2)](2+) complex is rationalized by an increase in the energy of the metal based dsigma orbital, rather than by manipulation of the pi* orbitals on the ligands. The acid-base and electrochemical properties of the compounds are reported also.
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