Add time:08/03/2019         Source:sciencedirect.com

Cyclometalated rhodium(III) and iridium(III) complexes were synthesized with imidazolyl modified phenanthroline ligands (1–2) of general formula [M(ppy)2(1)]Cl [M = Rh/Ir] and [{M(ppy)2}2(2)]Cl2 [M = Rh/Ir] (3–9). All the compounds 1–9, have been characterized spectroscopically to reveal their dependence on the solvent polarity and proticity of the environment. The photophysical details show that the ligands as well as the cyclometalated complexes have spectrum of variations depending on the immediate solvent environment and pH of the medium. Electrochemical studies show variation in the electrochemical behaviour due to the change of the metal centres.

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