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Red luminescence control of Eu(III) complexes by utilizing the multi-colored electrochromism of viologen derivatives

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Abstract

The electroresponsive switching of red photoluminescence based on the electrochemical coloration of cyan–magenta–green (CMG) viologen components was achieved by combining a luminescent Eu3+ chelate and viologen derivatives, resulting in CMG coloration in a single cell. The cell coloration was controlled by an electrochromic (EC) reaction, which also modulated the photoluminescence of the Eu3+ chelate with high contrast, by transferring energy from the excited state of the Eu3+ ion to the colored states of EC molecules. Cyclic voltammograms, photoluminescence spectra, absorption spectra, luminescence quantum yields, and luminescence lifetimes were measured to clarify the differences between the luminescence quenching and energy transfer efficiencies for each C, M, and G coloration associated with the electrochromism. Thus, the spectral overlap between the luminescence band of the Eu3+ chelate and the absorption band of the colored EC molecules was proven to affect the efficiency of luminescence modulation.

Graphical abstract: Red luminescence control of Eu(iii) complexes by utilizing the multi-colored electrochromism of viologen derivatives

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Publication details

The article was received on 14 Dec 2016, accepted on 01 Apr 2017 and first published on 06 Apr 2017


Article type: Paper
DOI: 10.1039/C6CP08528H
Citation: Phys. Chem. Chem. Phys., 2017, Advance Article
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    Red luminescence control of Eu(III) complexes by utilizing the multi-colored electrochromism of viologen derivatives

    K. Kanazawa, Y. Komiya, K. Nakamura and N. Kobayashi, Phys. Chem. Chem. Phys., 2017, Advance Article , DOI: 10.1039/C6CP08528H

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