An analysis of IEEE publications

INSPEC Accession Number:8979846This paper appears in: Engineering in Medicine and Biology Magazine, IEEE This study reports on a few elements of the scientific production of the IEEE. Other features could be displayed that would be interesting for a better understanding of the trajectories of the societies, journals, etc. The possibility of projecting new data onto the current spaces allows researchers to see if journals are static (the concepts and methods remaining stable) or dynamic (evolutions, ruptures can be tracked). In other words, this type of analysis can be used as a strategic tool to follow the impact and trends in engineering sciences. The fact that the authors concentrate on the IEEE publications prohibits any comparison with other societies publishing engineering papers. Such insights are feasible through the analysis of the INSPEC database. This could bring other clues on the coverage, the competition, and the reaction to new areas

An analysis of IEEE publications in biomedical engineering.

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Dimerization of a highly unsymmetrical lutetium bisphthalocyanine in solution

International audienceA lutetium heteroleptic bisphthalocyanine, bearing 16 chlorine atoms on one of the two macrocyclic rings and 4 tBu groups on the second phthalocyanine unit, dimerizes in dichloromethane or toluene solutions under ambient condition

Proton transfer across liquid│liquid interfaces facilitated by the disproportionation reaction of a lutetium bisphthalocyanine: a voltammetric study at a microinterface water │ nitrobenzene or dichlorohexane.

International audienceProton transfer across the water│solvent (nitrobenzene, 1,6-dichlorohexane) interface is facilitated by the presence in the organic phase of a lutetium bisphthalocyanine. The driving force of the facilitatedfacilitated transfer of H+ is the redox disproportionation reaction of this compound (M0) occurring at the liquid│liquid interface: a reaction induced by the very high affinity of M-, the reduced bisphthalocyanine, for the proton (KA = 10-13.5 mol-1l). The lutetium bisphthalocyanine, which exits as the molecular form over ~0.4 V (Kd = 10-6.4) in the neutral solvent, disproportionates completely in acidic solutions (eg, in nitrobenzene: KdH = 107.1 mol-1l). At the water│nitrobenzene interface, this disproportionation reaction facilitates the proton transfer by almost 0.30 V. Voltammetry at a rotating disk electrode in nitrobenzene confirms the redox disproportionation reaction and the basicity of the reduced lutetium bisphthalocyanine

A Generic Platform for the Addressable Functionalisation of Electrode Surfaces through Self-Induced "Electroclick"

International audienceA novel and general strategy for the immobilisation of functional objects onto electrodes is described. The concept is based on the addition of two pendant ethynyl groups onto a bis(pyridyl)amine derivative, which acts as a molecular platform. This platform is pre-functionalised with an N3-tagged object of interest by Huisgen cycloaddition to one of the ethynyl groups in biphasic conditions. Hence, when complexed by CuII, this molecular-object holder can be immobilised, by a self-induced electroclick, through the second ethynyl group onto N3-alkanethiol self-assembled monolayers on a gold electrode. Two different functional groups, a redox innocent ((CH2)3?Ph) and an electrochemical probe (ferrocene), were immobilised by following this strategy. The in situ electrochemical grafting showed, for both systems, that the kinetics of immobilisation is fast. The voltammetric characterisation of the surface-tagged functionalised copper complexes indicated that a good surface coverage was achieved and that a moderately fast electron-transfer reaction occurs. Remarkably, in the case of the redox-active ferrocenyl-immobilised system, the electrochemical response highlighted the involvement of the copper ion of the platform in the kinetics of the electron transfer to the ferrocene moiety. This platform is a promising candidate for applications in surface addressing in areas as diverse as biology and materials

Self-induced "electroclick" immobilization of a copper complex onto self-assembled monolayers on a gold electrode

International audienceWe report the self-induced "electroclick" immobilization of the [Cu(II)(6-ethynyl-TMPA)(H(2)O)](2+) complex, by its simple electro-reduction, onto a mixed azidoundodecane-/decane-thiol modified gold electrode. The redox response of the grafted [Cu(II/I)(TMPA)] at the modified electrode is fully reversible indicating no Cu coordination change and a fast electron transfer

Electrochemical behavior and dioxygen reactivity of tripodal dinuclear copper complexes linked by unsaturated rigid spacers

International audienceNew dinucleating ligands based on two tripodal tris(2-pyridylmethyl) amine (TMPA) units linked by a series of delocalized pi-electrons spacers have been synthesized. Their di-Cu-II complexes have been prepared and structurally characterized. As compared to the corresponding monotopic complexes, these dinuclear Cu-II complexes reveal spectroscopic and voltammetric features ascribable to weakly perturbed electronic interactions. In the case of the anthracenyl spacer, observation both in the solid and in solution suggests that the existence of intramolecular pi-pi stacking interactions influences the geometry of the complex and hence its electronic properties. The bis-Cu-I complexes were prepared electrochemically. In the specific case of the complex bearing a mono-alkyne spacer, addition of dioxygen in acetonitrile leads to the slow formation of a trans-mu-1,2 peroxo Cu-2 complex which shows good stability at 268 K (t(1/2) = 240 s). Analysis of the kinetics of the peroxo formation by UV-vis spectroscopy suggests that the increased activation barrier for intramolecular binding of dioxygen is due to the rigidity of the spacer