Metalloporphyrin electropolymerization: electrochemical quartz crystal microgravimetric studies

Vago, Miguel; Campodall'Orto, V; Rezzano, Irene; Forzani, Erica; Calvo, Ernesto J.

doi:10.1016/j.jelechem.2003.11.024

Cited by 16 publications

(8 citation statements)

References 24 publications

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“…12 Therefore, metalloporphyrins have potential applications in electrochemical sensing. Attracted by the high biomimetic catalytic efficiency of metalloporphyrins 13,14 and various valence states and electrochemical activity of copper/ cobalt, porphyrin, copper and cobalt were selected to synthesize a bimetallic metalloporphyrinic framework. A new bimetallic MOF, [Cu 2 -Co [5,10,15,20-(4-carboxyphenyl)porphyrin](H 2 O) 2 ]Á0.5DMFÁ 5H 2 O (Cu-CoTCPP), was successfully synthesized hydrothermally in this work.…”

Section: Introductionmentioning

confidence: 99%

A new bifunctional electrochemical sensor for hydrogen peroxide and nitrite based on a bimetallic metalloporphyrinic framework

et al. 2015

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Section: Introductionmentioning

confidence: 99%

A new bifunctional electrochemical sensor for hydrogen peroxide and nitrite based on a bimetallic metalloporphyrinic framework

et al. 2015

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“…The concept has been widely considered for bulk polymer components, by determining shear modulus (or compliance) data, commonly at low frequencies associated with classical electromechanical devices. We − and others , have recently developed the capability to determine shear moduli for thin polymer films loaded onto high frequency (MHz) acoustic wave devices. The dimensions (10 nm to 10 μm) of such films are typical of practical applications in electrochemistry specifically and nanoscience generally: examples include sensors, energy conversion/storage, electrochromic devices, molecular electronic devices, micromechanical actuators, and electrocatalysis .…”

Section: Introductionmentioning

confidence: 99%

Time−Temperature Superposition for Viscoelastic Properties of Regioregular Poly(3-hexylthiophene) Films

2005

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Shear moduli were determined for chemically polymerized and solvent cast regioregular poly(3-hexylthiophene) films, using thickness shear mode acoustic wave resonators. The results are strikingly different to those for electropolymerized regiorandom poly(3-hexylthiophene) films. The time scale of the measurement was varied directly by use of higher harmonics of the acoustic wave resonator and indirectly via temperature. The significant variations in shear modulus with effective time scale can be "normalized"onto a stress master relaxation curve by using the concept of time-temperature superposition; this is the first time this has been demonstrated for electroactive films. The shift factors required to effect this normalization do not follow the classical Williams-Landel-Ferry (WLF) equation developed for long-range backbone motions of bulk polymers. Instead, they follow an Arrhenius-like behavior, commonly used to describe secondary motions of polymer side-chains. The activation enthalpy associated with this is independent of applied potential, is the same as for as cast (undoped) films, and is similar to that for rotation about a carbon-carbon single bond. These all point to the hexyl side-chains as the origins of the observed phenomena, consistent with the "melting point" separating two temperature-dependent phases and with the different molecular packing arrangements that would necessarily apply to regioregular and regiorandom materials.

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“…In these cases, the film thickness is crucial in determining the physicochemical properties of the resulting electrode .Then, the preferred coordination number of the central metal ion and the nature of the coordinating ligands establish the matrix structure, defining selectivity . In our experience, Co atom does not present a planar conformation in polyCo(III)PP, resulting in a less packed structure of this film , which explains the high and unique tendency of polyCo(III)PP to act as a selective complexing center to incorporate axial ligands . The electropolymerized Ni(II) Protoporphyrin (polyNiPP) turn out to be really interesting, because its behavior was highly dependent on the method of fabrication and completely different from polyCoPP .…”

Section: Introductionmentioning

confidence: 99%

Approach for Modulation of the Permselective Properties of Ni(II) Porphyrin Polymers

Carballo

Rezzano

2017

Electroanalysis

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The electropolymerization of Ni(II) Protoporphyrin (polyNiPP) onto glassy carbon electrodes is performed in different experimental conditions, varying the supporting electrolytes, solvent, and oxidative potentials. The AFM images show different average thickness for each polymer, polyNiPP(TBAP) (0.6 μm) and polyNiPP(LiClO4) (0.1μm). The polyNiPP(LiClO4) describes a straight line plot of EMF versus log (C) for NO2−, with the slope of 37 mV per concentration decade while the same film is not sensitive to the thiocyanate concentration. For polyNiPP(TBAP) the slope for thiocyanate progressively increase when is oxidized in aqueous solution. A sub‐Nernstian response (59 mV /decade) is obtained at 1000 mV. The Nyquist plots confirm that the method of preparation establishes the properties of films related to the movement of the ions.

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Metalloporphyrin electropolymerization: electrochemical quartz crystal microgravimetric studies

Cited by 16 publications

References 24 publications

A new bifunctional electrochemical sensor for hydrogen peroxide and nitrite based on a bimetallic metalloporphyrinic framework

A new bifunctional electrochemical sensor for hydrogen peroxide and nitrite based on a bimetallic metalloporphyrinic framework

Time−Temperature Superposition for Viscoelastic Properties of Regioregular Poly(3-hexylthiophene) Films

Approach for Modulation of the Permselective Properties of Ni(II) Porphyrin Polymers

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