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Spinolate Lanthanide Complexes for High Circularly Polarized Luminescence Metrics in the Visible and Near-Infrared by Bre-Anna N. Willis; David Schnable; Nathan D. Schley; Gaël Ung is a Chemistry article available to read on EtoBox.

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Analogues of Shibasaki's complexes supported by enantiopure Spinol are synthesized and characterized. The tris(Spinol) Ln III complexes are generated either by ligand deprotonation followed by complexation with lanthanide triflate salts or by in situ deprotonation by Ln(N(SiMe 3 ) 2 ) 3 salts in the presence of additional base. The resulting complexes are found to be luminescent and chiroptically active for both circular dichroism and circularly polarized luminescence (CPL), notably producing strong CPL with dissymmetry factors (g lum ) of up to 0.50, 0.53, and 0.53 for Sm, Tb, and Dy, respectively. The Sm complex is found to be CPL-active in the near-infrared (NIR) region at 980 nm, representing the first report of NIR CPL from Sm. Additionally, the Tb complex, due to efficient sensitization (Φ = 0.846 in tetrahydrofuran) coupled with strong dissymmetry factors, achieves a CPL brightness (B CPL ) of 3760 M -1 cm -1 , the highest reported for any CPL-active compound to date. These are rare examples of compounds that show simultaneous improvement of both CPL metrics (g lum and B CPL ). Solid-state structural analysis of the Spinolate complexes and comparisons to other CPL-active ana

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Author

Bre-Anna N. Willis; David Schnable; Nathan D. Schley; Gaël Ung

Publisher

American Chemical Society (ACS)

Published

2022

Language

EN

Field

Chemistry (Physical Sciences)