Spectroelectrochemical Characterisation of poly[Ni(saltMe)]-Modified Electrodes

Vilas-Boas, Miguel; Freire, Cristina; Castro, Baltazar de; Christensen, Paul; Hillman, A. Robert

doi:10.1002/1521-3765(20010105)7:1<139::aid-chem139>3.3.co;2-h

Cited by 15 publications

(32 citation statements)

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“…The structures of the polymeric films derived from [Ni(salen)] monomeric entities are a matter of discussion [6][7][8]. The difficulty arises because poly[Ni(salen)] films are soft, amorphous materials, with a low degree of longrange structural order: consequently, conventional X-ray diffraction techniques cannot be applied.…”

Section: Introductionmentioning

confidence: 99%

Correlating structure and ion recognition properties of [Ni(salen)]-based polymer films

Tedim¹,

Carneiro²,

Bessada³

et al. 2007

Journal of Electroanalytical Chemistry

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Section: Introductionmentioning

confidence: 99%

Correlating structure and ion recognition properties of [Ni(salen)]-based polymer films

Tedim¹,

Carneiro²,

Bessada³

et al. 2007

Journal of Electroanalytical Chemistry

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“…Vilas-Boas et. al [1] also suggest that methyl (Me) groups present on the imine bridge of the 2,3-dimethyl-N,N'-bis(salicylidene)butane-2,3-diaminatonickel(II) (Ni-SaltMe) structure can provide repulsive forces, and would impose an open and flexible structure, responsible for facile anion ingress and solvent swelling. In comparison, Ni(Salen) shows a more compact structure, and the movement of species from solution into the film are associated solely with film charge transfer [1].…”

Section: Gravimetric Monitoringmentioning

confidence: 99%

“…It was found that the values of E m are proportional to the ratio [ionic charge]/[ionic radius] of the anion present in solution for NO 3 − , ClO 4 − and SO 4 2− , Fig. 10, confirming the dependence on the mobility of the counterions of the supporting electrolyte in charge transport and in maintaining electroneutrality during potential cycling [1,2,46]. The higher value of E m obtained for Cl − ions compared with NO 3 − , which has a similar size [48], may indicate that Cl − has a different interaction within the Ni-Salpn film structure.…”

Section: The Counteranion Effectmentioning

confidence: 99%

“…Metal-Schiff complexes with tetradentate N 2 O 2 ligands are being widely studied as modifiers of electrodes by oxidative electrodeposition on a variety of conducting surfaces [1][2][3][4]. The electrodeposition mechanism has been extensively discussed in the literature by Goldsby et al [5,6] and Audebert et al [7][8][9], in which radical-radical coupling was proposed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nickel- N,N’ – bis (salicylidene)-1,3-propanediamine (Ni- Salpn ) film-modified electrodes. Influence of electrodeposition conditions and of electrode material on electrochemical behaviour in aqueous solution

Martin

Gouveia‐Caridade

Crespilho

et al. 2015

Electrochimica Acta

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Influence of electrode material EQCM UV-vis and Raman spectroscopy a b s t r a c t Modified electrodes based on films of Schiff base complexes are excellent candidates for sensing applications. The influence of the electrode material, glassy carbon, platinum, gold or indium tin oxide, on the electrodeposition of nickel-N,N'-bis(salicylidene)-1,3-propanediamine (Ni-Salpn) films in 1,2-dichloroethane (DCE) was investigated, and their electrochemical behaviour was evaluated by cyclic voltammetry and electrochemical impedance spectroscopy. The effect of the electrodeposition potential and electrodeposition time on the electrochemical behaviour of Ni-Salpn was examined using glassy carbon as substrate. The film growth process was investigated using the electrochemical quartz crystal microbalance and UV-vis absorption spectroscopy and structural differences between the Ni-Salpn complex and the Ni-Salpn film were examined by micro-Raman spectroscopy. The results demonstrate that the electrodeposition mechanism is independent of the electrode material, but that the nature of the substrate material influences the rate of film growth, the electrochemical behaviour and the stability of the film-modified electrodes in aqueous solution. Counteranion insertion during oxidation can break the bonds between the complexes in the stacked Ni-Salpn film structure and cause both mass loss and blockage of the redox metal centre activity, but these effects are small in thin films.

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“…Despite intensive studies of several teams over the last two decades, the mechanism of polymerization, the polymer structure, the type of conductivity and their mechanism of the redox activity still remain a matter of controversy. It was suggested that the polymer chain passes through the set of conjugated bonds inside the salen ligand and the metal, the neighboring monomer units of the polymer being linked via para-or ortho-positions of their side phenyl moieties ("ligand-based polymerization process", so that the electron transport is realized owing to the polaronic-type conductivity along the chain [178][179][180][181][182][183]. An alternative polymerization mechanism might be a metal-based polymerization process, in which the metal is first oxidized, after which the oxidized species could form a stacked deposit stabilized by the charge transfer.…”

Section: Conjugated Metallopolymersmentioning

confidence: 99%