A. de Poulpiquet, B. Diez-Buitrago, M. Milutinovic, B. Goudeau, L. Bouffier, S. Arbault, A. Kuhn, N. Sojic

ChemElectroChem, 2016, 3, 404-409

Bipolar electrochemistry (BPE) is exploited here to address simultaneously thousands of carbon micro-beads dispersed in a solution. The suspension is placed in a capillary between 2 feeder electrodes generating in situ an electric field. The simultaneous occurrence of electrogenerated chemiluminescence (ECL) at each bead leads to a global 3D luminescent phenomenon, remotely driven by BPE. This concept, demonstrated previously as a proof-of-principle, is extended here to luminol in order to tune the emission wavelength. Determinant analytical parameters such as the applied voltage and the number of emitters were studied for the optimization of the system. The linearity of the ECL intensity in the bulk as a function of the luminophore concentration is successfully demonstrated for both ECL systems (luminol and Ru(bpy)32+). Finally, we show that both luminophores can be combined in the same capillary and addressed by BPE, leading thus to simultaneous ECL emissions at distinct wavelengths.

2016-06

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