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Encapsulation-induced emission enhancement (EIEE) of Eu(III)-complexes by aromatic micelles in water

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Abstract

Eu(III)-complexes emit highly pure and intense red luminescence in aprotic organic solvents, yet the emission is usually quenched completely in the presence of aqueous solvents. Here we report that typical Eu(III)-complexes are readily encapsulated in the hydrophobic cavities of aromatic micelles, composed of amphiphilic molecules with bent aromatic frameworks. Whereas the emissivity of the Eu(III)-complexes themselves is zero in aqueous solutions, the resultant host–guest nanocomposites exhibit relatively strong red emission (up to Φ = 48%) with long emission lifetimes (up to τ = 1.05 ms) even in water. Thus, encapsulation-induced emission enhancement (EIEE) of the otherwise water-deactivated luminescent compounds is demonstrated by the aromatic micelle.

Graphical abstract: Encapsulation-induced emission enhancement (EIEE) of Eu(iii)-complexes by aromatic micelles in water

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Publication details

The article was received on 09 Dec 2017, accepted on 29 Dec 2017 and first published on 02 Jan 2018


Article type: Communication
DOI: 10.1039/C7CC09450G
Citation: Chem. Commun., 2018, Advance Article
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    Encapsulation-induced emission enhancement (EIEE) of Eu(III)-complexes by aromatic micelles in water

    T. Kai, M. Kishimoto, M. Akita and M. Yoshizawa, Chem. Commun., 2018, Advance Article , DOI: 10.1039/C7CC09450G

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