Florent Pinaud, Romain Millereux, Pierre Vialar-Trarieux, Bogdan Catargi, Sandra Pinet, Isabelle Gosse, Neso Sojic, Valérie Ravaine

J. Phys. Chem. B, 2015, 119 (40), pp 12954–12961

Stimuli-responsive microgels with redox and luminescent resonance energy transfer (LRET) properties are reported. Poly(N-isopropylacrylamide) microgels are functionalized simultaneously with two models dyes: a derivative of tris(bipyridine) ruthenium complex and cyanine 5. Both moieties are chosen as a pair of luminophores with a spectral overlap for resonance energy transfer, where the ruthenium complex acts as a donor and the cyanine an acceptor. The effect of the temperature on the efficiency of the LRET of the microgels has been investigated and compared using either photoluminescence (PL) or electrochemiluminescence (ECL) as the excitation process. In PL, the synthesized microgels exhibit resonance energy transfer regardless of the swelling degree of the microgels. The transfer efficiency is a function of the donor–acceptor distance and can be tuned either by the swell–collapse phase transition or by the dye content in the microgel network. In ECL, the microgels emit light only at the wavelength of the ruthenium complex because the resonance energy transfer does not occur. Indeed, even within the microgel matrix, the cyanine dye is oxidized at the potential required for ECL generation, which impairs its emitting properties. Thus, both excitation channels (i.e., PL and ECL) show differential behavior for the resonance energy transfer processes.

2015-18

Thumbnail N. Sojic, S. Arbault, L. Bouffier, A. Kuhn. Book Chapter in Luminescence in Electrochemistry Eds. F. Miomandre, P. Audebert. 2017. Pp. 257-291. Springer The great success of electrogenerated...
Thumbnail L. Bouffier, S. Arbault, A. Kuhn, N. Sojic Techniques de l’Ingénieur. 2018. P156 Les mesures sélectives et sensibles dans des échantillons complexes tels que l’urine ou le sang sont devenues des...
Thumbnail N. Sojic BOOK Royal Society of Chemistry Electrogenerated chemiluminescence (ECL) is a powerful and versatile analytical technique, which is widely applied for biosensing and successfully...
Thumbnail Arbault S.In Chemical Sensors and Biosensors, Eds. R. Lalauze and N. Jaffrezic-Renault, ISTE-Wiley, London, 2012. Book Chapter Technological needs for chemical, ionic and biological species detection...
Fibre-optic Biosensors
21 January 2013
Thumbnail Sojic N.,In Chemical Sensors and Biosensors, Eds. R. Lalauze and N. Jaffrezic-Renault, ISTE-Wiley, London, 2012. Book Chapter Technological needs for chemical, ionic and biological species...
Thumbnail Sojic N., Kuhn A.,Techniques de l’Ingénieur, Référence P150, 2012. Les capteurs sont devenus indispensables pour de nombreux aspects de notre vie, avec des exemples d’application allant de la...
Thumbnail Heim M., Kuhn A.,In Handbook of Electrochemistry, Springer, in press, 2013. Book Chapter In recent years, the field of highly ordered macroporous thin films coated onto solid electrode surfaces...