2024
DOI: 10.1021/acs.inorgchem.4c01270
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A Near-Infrared Luminescent Cr(III) N-Heterocyclic Carbene Complex

Robert W. Jones,
Rory A. Cowin,
Iona I. Ivalo
et al.

Abstract: Photoluminescent coordination complexes of Cr(III) are of interest as near-infrared spin-flip emitters. Here, we explore the preparation, electrochemistry, and photophysical properties of the first two examples of homoleptic N-heterocyclic carbene complexes of Cr(III), featuring 2,6-bis(imidazolyl)pyridine (ImPyIm) and 2-imidazolylpyridine (ImPy) ligands. The complex [Cr(ImPy) 3 ] 3+ displays luminescence at 803 nm on the microsecond time scale (13.7 μs) from a spin-flip doublet excited state, which transient … Show more

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