A new zinc dithiocarbamate functionalized with palmitoyl groups is described as a useful tool for the preparation of metallosurfactants through a transmetallation reaction with the transition metals rhenium and technetium. An amphiphilic rhenium complex is synthesized by a transmetallation reaction with the zinc complex in presence of the polar phosphine sodium triphenylphosphine trisulfonate, which leads to a rhenium complex with a lipophilic dithiocarbamate and a polar phosphine ligand. The study of this rhenium complex has shown that it selfaggregates, leading to the formation of aggregates that have been analyzed by dynamic light scattering and cryotransmission electron microscopy (cryo-TEM). In addition, this amphiphilic rhenium complex is incorporated into soy phosphatidylcholine liposomes, whether liposomes are prepared by mixing phospholipid and the rhenium complex or by the incorporation of the rhenium complex into preformed liposomes. The one-pot reaction of the radiocompound [ 99m Tc(H 2 O) 3 (CO) 3 ] + with the above-mentioned zinc dithiocarbamate, the phosphine sodium triphenylphosphine trisulfonate and the phospholipid soy phosphatidylcholine, leads to liposomes labeled with a Tc-99m homologous complex of the rhenium complex, in accordance with the high-performance liquid chromatography (HPLC) data.

In this work, a new simple molecule, 4-nitrobenzyl phenyl thioether (1), is prepared and used for controlling and tuning CO 2 reactivity in function of the electrode potential. The first part of the study is devoted to determining the electrochemical reduction mechanism of 1 in N,N-dimethylformamide under nitrogen. The compound shows a first reversible one-electron transfer process, whereas the reaction cleavage of the CÀ S bond takes place after a second electron transfer process through a stepwise mechanism (thermodynamic and kinetic parameters are conveniently determined). In the second part of the study, the inert atmosphere was replaced by a CO 2 atmosphere. At low potential values, compound 1 acts as a redox mediator that allows the reduction of CO 2 at ca. À 1.2 V vs. SCE. The electrochemical generation of 1 2À at more negative potential values leads to a CÀ S bond cleavage reaction that yields the corresponding nitrobenzyl and thiosulfate anions, which react with CO 2 . The nitro aromatic anion derivative makes it possible to obtain electrocarboxylated derivatives, whereas the thiophenolate anion captures CO 2 reversibly. Hence, this research opens a new way of tuning and controlling the reaction processes associated with CO 2 from homogenous catalysis at low negative potentials, to electrocarboxylation processes passing to CO 2 reversible electrochemically triggered adsorption processes.

In this work, a new simple molecule, 4-nitrobenzyl phenyl thioether (1), is prepared and used for controlling and tuning CO 2 reactivity in function of the electrode potential. The first part of the study is devoted to determining the electrochemical reduction mechanism of 1 in N,N-dimethylformamide under nitrogen. The compound shows a first reversible one-electron transfer process, whereas the reaction cleavage of the CÀ S bond takes place after a second electron transfer process through a stepwise mechanism (thermodynamic and kinetic parameters are conveniently determined). In the second part of the study, the inert atmosphere was replaced by a CO 2 atmosphere. At low potential values, compound 1 acts as a redox mediator that allows the reduction of CO 2 at ca. À 1.2 V vs. SCE. The electrochemical generation of 1 2À at more negative potential values leads to a CÀ S bond cleavage reaction that yields the corresponding nitrobenzyl and thiosulfate anions, which react with CO 2 . The nitro aromatic anion derivative makes it possible to obtain electrocarboxylated derivatives, whereas the thiophenolate anion captures CO 2 reversibly. Hence, this research opens a new way of tuning and controlling the reaction processes associated with CO 2 from homogenous catalysis at low negative potentials, to electrocarboxylation processes passing to CO 2 reversible electrochemically triggered adsorption processes.