Electrochemical oxidative polymerization of binuclear ‘anil’ and ‘salen’-type complexes and tetrahydro derivatives

Abstract

New kinds of modiÐed electrodes have been prepared on the basis of electroactive polymers containing bimetallic " anil Ï and " salen Ï-type complexes. New tetrahydro " anil Ï ligands and complexes have been synthesized, giving birth to a new family of electroactive polymers. The polymers have been prepared potentiostatically and exhibit electrochemical properties analogous to simple polysalens. In the case of binuclear complexes both imino-and amino-linked monomers polymerize, but the polymers exhibit quite di †erent charge transfer dynamics.Electropolyme risation anodique de complexes binucle aires de type " anil Ï et " salen Ï et de leur de rive s tetrahydroge ne s. Un nouveau type dÏe lectrodes modiÐe es a e te e labore sur la base de polyme`res e lectroactifs issus de complexes bime talliques de type " anil Ï et " salen Ï. Nous avons synthe tise des ligands et complexes tetrahydro " anil Ï originaux donnant acce`s a`une nouvelle famille de polyme`res e lectroactifs. Les complexes binucle aires posse dant des liaisons imine et amine polyme risent e galement, mais les polyme`res pre sentent des comportements tre`s di †e rents sur le plan du transfert e lectronique.

Structural and electrochemical characterisation of [Pd(salen)]-type conducting polymer films

“…[M(salen)]-type complexes (M = transition metal) have been studied in this context due to the robustness of the salen ligand and its ability to coordinate several transition metal centres [7]. Since the first studies of poly[M(salen)] (M = Ni, Cu) modified electrodes by Goldsby and co-workers [8][9][10], several groups have explored these polymers [11][12][13][14][15][16][17][18][19][20][21][22]. Despite detailed electrochemical and spectroscopic studies, there is no consensus concerning the mechanism of electronic conduction.…”

Electronic Spectra of Mono‐ and Dinuclear Complexes of Fully π‐Conjugated salphen Ligands Synthesized by Using 2,6‐Dihydroxynaphthalene Carbaldehydes

“…[8][9][10][11][12][13] In addition, electrolytic polymerization of Ni-salen complexes is interesting methodology for the fabrication of conductive films, although the mechanism of conduction (e.g., by an intrachain or interchain carrier path) is still controversial. [14][15][16] p π -conjugated metallopolysalen and polysalphen compounds requires the preparation and analysis of well-defined oligonuclear complexes. However, there have been few reports [17] highlighting the effects of intracomplex (metalmetal and ligand-metal) interactions on the spectroscopic features of fully π-conjugated oligonuclear salen and salphen complexes.…”

An Easy Approach to Obtain Alcohol-Amines by Reduction of Alcohol Functionalized Imines

“…Syntheses of bis{2,6-bis[(2-hydroxy-5-methylphenyl)-aminomethyl]pyridine (H4L 2 , Scheme 1). This ligand was obtained by a modification of a method previously reported [14], and that is detailed as follows: To a suspension of H2L 1 (0.214 g, 0.616 mmol) in methanol (20 mL), NaBH4 (0.050 g, 1.232 mmol) is added in small portions during 30 min, and a very pale yellow solution is obtained. The solution is concentrated to dryness and the oily residue obtained is dissolved in 15 mL of 10% H3PO4.…”