Issue 26, 2023

Organometallic Ir(iii) complexes: post-synthetic modification, photophysical properties and binuclear complex construction

Abstract

Two methods of post-synthetic modification (Suzuki coupling and CuAAC click-reaction) were applied to Ir(III) complexes [Ir(C^N)2N^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.

Graphical abstract: Organometallic Ir(iii) complexes: post-synthetic modification, photophysical properties and binuclear complex construction

Supplementary files

Article information

Article type
Paper
Submitted
24 Mar 2023
Accepted
10 Jun 2023
First published
12 Jun 2023

Dalton Trans., 2023,52, 8986-8997

Organometallic Ir(III) complexes: post-synthetic modification, photophysical properties and binuclear complex construction

A. Yu. Gitlina, V. Khistiaeva, A. Melnikov, M. Ivonina, V. Sizov, D. Spiridonova, A. Makarova, D. Vyalikh and E. Grachova, Dalton Trans., 2023, 52, 8986 DOI: 10.1039/D3DT00901G

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