Striking solvent dependence of total emission and circularly polarised luminescence in coordinatively saturated chiral europium complexes: solvation significantly perturbs the ligand field

Fradgley, Jack D.; Frawley, Andrew T.; Pal, Robert; Parker, David

Abstract

Examination of total emission and circularly polarised luminescence (CPL) spectra of three 9-coordinate Eu(III) complexes with well-defined speciation shows that the ligand fields of these C3 symmetric complexes are extremely sensitive to solvent polarity, even when solvent is not present in the first coordination sphere. The energies, intensities, and (for CPL) the sign of some transitions vary with solvent polarity. These observations are rationalised by analysis of the factors that control total and circularly polarised emission, and have important implications for design of responsive luminescent Ln(III) probes.

Citation

Fradgley, J. D., Frawley, A. T., Pal, R., & Parker, D. (2021). Striking solvent dependence of total emission and circularly polarised luminescence in coordinatively saturated chiral europium complexes: solvation significantly perturbs the ligand field. Physical Chemistry Chemical Physics, 23(19), 11479-11487. https://doi.org/10.1039/d1cp01686e

• Journal Article Type: Article
• Acceptance Date: Apr 28, 2021
• Online Publication Date: Apr 28, 2021
• Publication Date: 2021-05
• Deposit Date: Jun 24, 2021
• Publicly Available Date: Jun 24, 2021
• Journal: Physical Chemistry Chemical Physics
• Print ISSN: 1463-9076
• Electronic ISSN: 1463-9084
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 23
• Issue: 19
• Pages: 11479-11487
• DOI: https://doi.org/10.1039/d1cp01686e
• Public URL: https://durham-repository.worktribe.com/output/1273626