Organometallic Ir(iii) complexes: post-synthetic modification, photophysical properties and binuclear complex construction
Two methods of post-synthetic modification (Suzuki coupling and CuAAC click-reaction) were applied to Ir(iii) complexes Ir((CN)-N-<^>)(2)(NN)-N-<^> to provide the second highly selective donor site. One family of functionalized complexes was used to demonstrate the potential of post-synthetic modification for controlled construction of d-d and d-f binuclear complexes. The complexes obtained were characterized by CHN elemental analysis, NMR spectroscopy, ESI mass-spectrometry, FTIR spectroscopy and single crystal X-ray diffraction analysis. By means of XPS and NEXAFS spectroscopy the coordination of diimine donor site to the Ln(iii) centre has been definitely confirmed. The photophysical properties of mono- and binuclear complexes were carefully investigated, and the evolution of luminescent characteristics during the formation of a system of connected metallocenters is also discussed. TDDFT calculations were used to describe the luminescence mechanism and to confirm the conclusions made on the basis of experimental data.
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Gitlina, A. Yu., Khistiaeva, V., Melnikov, A., Ivonina, M., Sizov, V., Spiridonova, D., Makarova, A., Vyalikh, D., & Grachova, E. (2023). Organometallic Ir(iii) complexes: post-synthetic modification, photophysical properties and binuclear complex construction. Dalton Transactions. https://doi.org/10.1039/d3dt00901g
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WOS:001010098600001
2023-06-12
REVIEWED
EPFL