Electrochemistry of Biosystems
Linking Glucose Oxidation to Luminol-based Electrochemiluminescence using bipolar Electrochemistry
Asymmetric Modification of TiO2 Nanofibers with Gold by Electric-Field-Assisted Photochemistry
Stimuli-responsive microgels for electrochemiluminescence amplification

H. Li, J. Daniel, J.-B. Verlhac, M. Blanchard-Desce, N. Sojic

Chem. Eur. J., 201622, 12702-12714

A series of symmetric fluorescent dyes built from a spirofluorene core, bearing electroactive end-groups and having different conjugated linkers were prepared in view of their use as building blocks for the preparation of electrochemiluminescent (ECL) dyes and nanoparticles. Their electrochemical, spectroelectrochemical and ECL properties were first investigated in solution and structure/activity relationships were derived. The electrochemical and ECL properties show drastic variation that could be tuned contingent on the nature of the π-conjugated system, end-groups and of the core. Among the series, the highly fluorescent dye based on a spirofluorene core and triphenylamine end-groups connected via thiophene moieties (1) shows the most promising and intriguing properties. 1 is reversibly oxidized in three well-separated steps and a very intense and large ECL signal is generated. Its ECL efficiency is 4.5-time greater than that of the reference compound, Ru(bpy)32+.This remarkably high efficiency is due to the very good stability of the higher oxidized states and it makes 1 a very bright organic ECL luminophore. In addition, thanks to its molecular structure, this dye retains fluorescence when nano-precipitated in water, leading to Fluorescent Organic Nanoparticles (FONs). Redox behaviour of these FONs shows oxidation waves consistent with the initial molecular species. Finally, ECL from FONs made of 1 was recorded in water and strong ECL nano-emitters are thus obtained.

2016-09

Self-coacervation of ampholyte polymer chains as an efficient encapsulation strategy.


Thursday, 02 May 2019
A. Perro, L. Giraud, N. Coudon, S. Shanmugathasan, B. Goudeau, J.-P. Douliez and V. Ravaine Journal of Colloid and Interface Science 2019 548, 275-283. Coacervation is a phase separation process involving two aqueous phases, one solute-phase... Read More...

Kinetics of spontaneous microgels adsorption and stabilization of emulsions produced using microfluidics


Thursday, 02 May 2019
M.-C. Tatry, E. Laurichesse, A. Perro, V. Ravaine and V. Schmitt Journal of Colloid and Interface Science 2019, 548, 1-11. The aim of the paper is to examine the adsorption kinetics of soft microgels and to understand the role off undamental... Read More...

Adsorption of Proteins on Dual Loaded Silica Nanocapsules


Thursday, 02 May 2019
S. Ramalingam, G. Le Bourdon, E. Pouget, A. Scalabre, J. Raghava Rao and A. Perro J. Phys. Chem B 2019, 123 (7), 1708-1717. The design of nanocarriers containing hydrophobic and hydrophilic compounds represents a powerful tool for cocktail... Read More...