241. Modulation of circularly polarized luminescence by swelling of microgels functionalized with enantiopure [Ru(bpy)₃]²⁺ luminophores
     Kyohei Yoshida, Maino Kajiwara, Yutaka Okazaki, Véronique Lapeyre, Francesco Zinna, Neso Sojic, Laurent Bouffier, Jérôme Lacour, Valérie Ravaine, Reiko Oda
     Chem. Commun. 2024, 60, 1743-1746

Chemoresponsive microgels functionalised with enantiomeric Δ- or Λ- [Ru(bpy)₃]²⁺ showed tunable chiroptical properties upon swelling and shrinking. The tuning of the absolute values and the ratio between the excitation and emission dissymmetry factors, glum and gabs, is triggered by a modulation of the local mobility of [Ru(bpy)₃]²⁺. This is done via addition of fructose, which controlled interactions and distances between [Ru(bpy)₃]²⁺ and its enhancer, phenylboronic acid. Highest g values are observed for collapsed microgels in which phenylboronic acid and [Ru(bpy)₃]²⁺ complexes have the strongest interactions.

DOI : 10.1039/D3CC04391F 

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