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Circularly polarized luminescence from Tb(III) interacting with chiral polyether macrocycles.

ABSTRACT: A straightforward two-step synthesis protocol affords a series of chiral amide-based bis-pyridine substituted polyether macrocycles. One ligand is particularly able to complex terbium(III) ions spontaneously. Upon complexation, interesting chiroptical properties are observed both in absorbance (ECD) and in fluorescence (CPL). In ligand-centered electronic circular dichroism, a sign inversion coupled with a signal enhancement is measured; while an easily detectable metal-centered circularly polarized luminescence with a g_lum of 0.05 is obtained for the main ⁵D₄ → ⁷F₅ terbium transition. The coordination mode and structure of the complex was studied using different analysis methods (NMR analysis, spectrophotometric titration and solid-state elucidation).

SUBMITTER: Homberg A

PROVIDER: S-EPMC9641584 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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Circularly polarized luminescence from Tb(III) interacting with chiral polyether macrocycles.

Homberg Alexandre A Navazio Federica F Le Tellier Antoine A Zinna Francesco F Fürstenberg Alexandre A Besnard Céline C Di Bari Lorenzo L Lacour Jérôme J

Dalton transactions (Cambridge, England : 2003) 20221108 43

A straightforward two-step synthesis protocol affords a series of chiral amide-based bis-pyridine substituted polyether macrocycles. One ligand is particularly able to complex terbium(III) ions spontaneously. Upon complexation, interesting chiroptical properties are observed both in absorbance (ECD) and in fluorescence (CPL). In ligand-centered electronic circular dichroism, a sign inversion coupled with a signal enhancement is measured; while an easily detectable metal-centered circularly polar ...[more]

PMID: 36218085

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