Mechanism of redox transformation of titanocene dichloride centers immobilized inside a polypyrrole matrix - EQCM and XPS evidences

Magdalena Skompska; Mikhail A. Vorotyntsev; Jerome Goux; Claude Moise; Olivier Heinz; Yaron S. Cohen; Mikhael D. Levi; Yosef Gofer; Grigory Salitra; Doron Aurbach

doi:10.1016/j.electacta.2004.10.036

Mechanism of redox transformation of titanocene dichloride centers immobilized inside a polypyrrole matrix - EQCM and XPS evidences

Magdalena Skompska, Mikhail A. Vorotyntsev, Jerome Goux, Claude Moise, Olivier Heinz, Yaron S. Cohen, Mikhael D. Levi, Yosef Gofer, Grigory Salitra, Doron Aurbach

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

We report electrochemical quartz crystal microbalance (EQCM) results for electrodeposition of titanocene derivatized polypyrrole p(Tc3Py) films and redox transformation of polypyrrole matrix and titanocene centers immobilized in the film. Films of p(Tc3Py), Tc3Py = Tc(CH₂)₃NC ₄H₄ (Tc = Cl₂TiCpCp′, Cp = C ₅H₅, Cp′ = C₅H₄) were obtained from acetonitrile solutions of monomer on a Pt disc or thin Au layer evaporated on 10 MHz quartz crystals. Polymerization efficiency, derived from the slope of the change of resonant frequency as a function of the deposition charge ranged from 54% to 75%. A gradual loss of redox activity of Tc centers during consecutive redox cycles of p(Tc3Py) film in TBAFP₆/THF solutions is discussed in terms of elimination of Cl^- ions from the Tc complex and accommodation of solvent molecule. The EQCM data are supported by XPS results. The preliminary studies performed in TEACl in AN solution have shown that the presence of Cl^- ions in the solution markedly inhibits the loss of redox activity of Tc centers immobilized in the polymer matrix.

Original language	English
Pages (from-to)	1635-1641
Number of pages	7
Journal	Electrochimica Acta
Volume	50
Issue number	7-8
DOIs	https://doi.org/10.1016/j.electacta.2004.10.036
State	Published - 15 Feb 2005

Bibliographical note

Funding Information:
We express our gratitude for the technical help of Evelyne Pousson. We are grateful to French Embassy in Israel and the Ministry of Science of Israel for the support of mutual visits within the framework of Arc-en-Ciel/Keshet program. MS and MAV gratefully acknowledge the financial support within the framework of the Polonium program (project 07586QE – 2004).

Funding

We express our gratitude for the technical help of Evelyne Pousson. We are grateful to French Embassy in Israel and the Ministry of Science of Israel for the support of mutual visits within the framework of Arc-en-Ciel/Keshet program. MS and MAV gratefully acknowledge the financial support within the framework of the Polonium program (project 07586QE – 2004).

Funders	Funder number
French Embassy in Israel
Ministry of Science of Israel	07586QE – 2004

Keywords

Bis-cyclopentadienyl titanium dichloride
EQCM
Electrodeposition efficiency
Functionalized conducting polymers
Ion exchange
Polypyrrole-titanocene derivative
Titanocene
XPS

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10.1016/j.electacta.2004.10.036

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title = "Mechanism of redox transformation of titanocene dichloride centers immobilized inside a polypyrrole matrix - EQCM and XPS evidences",

abstract = "We report electrochemical quartz crystal microbalance (EQCM) results for electrodeposition of titanocene derivatized polypyrrole p(Tc3Py) films and redox transformation of polypyrrole matrix and titanocene centers immobilized in the film. Films of p(Tc3Py), Tc3Py = Tc(CH2)3NC 4H4 (Tc = Cl2TiCpCp′, Cp = C 5H5, Cp′ = C5H4) were obtained from acetonitrile solutions of monomer on a Pt disc or thin Au layer evaporated on 10 MHz quartz crystals. Polymerization efficiency, derived from the slope of the change of resonant frequency as a function of the deposition charge ranged from 54% to 75%. A gradual loss of redox activity of Tc centers during consecutive redox cycles of p(Tc3Py) film in TBAFP6/THF solutions is discussed in terms of elimination of Cl- ions from the Tc complex and accommodation of solvent molecule. The EQCM data are supported by XPS results. The preliminary studies performed in TEACl in AN solution have shown that the presence of Cl- ions in the solution markedly inhibits the loss of redox activity of Tc centers immobilized in the polymer matrix.",

keywords = "Bis-cyclopentadienyl titanium dichloride, EQCM, Electrodeposition efficiency, Functionalized conducting polymers, Ion exchange, Polypyrrole-titanocene derivative, Titanocene, XPS",

author = "Magdalena Skompska and Vorotyntsev, {Mikhail A.} and Jerome Goux and Claude Moise and Olivier Heinz and Cohen, {Yaron S.} and Levi, {Mikhael D.} and Yosef Gofer and Grigory Salitra and Doron Aurbach",

note = "Funding Information: We express our gratitude for the technical help of Evelyne Pousson. We are grateful to French Embassy in Israel and the Ministry of Science of Israel for the support of mutual visits within the framework of Arc-en-Ciel/Keshet program. MS and MAV gratefully acknowledge the financial support within the framework of the Polonium program (project 07586QE – 2004).",

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AU - Skompska, Magdalena

AU - Vorotyntsev, Mikhail A.

AU - Goux, Jerome

AU - Moise, Claude

AU - Heinz, Olivier

AU - Cohen, Yaron S.

AU - Levi, Mikhael D.

AU - Gofer, Yosef

AU - Salitra, Grigory

AU - Aurbach, Doron

N1 - Funding Information: We express our gratitude for the technical help of Evelyne Pousson. We are grateful to French Embassy in Israel and the Ministry of Science of Israel for the support of mutual visits within the framework of Arc-en-Ciel/Keshet program. MS and MAV gratefully acknowledge the financial support within the framework of the Polonium program (project 07586QE – 2004).

PY - 2005/2/15

Y1 - 2005/2/15

N2 - We report electrochemical quartz crystal microbalance (EQCM) results for electrodeposition of titanocene derivatized polypyrrole p(Tc3Py) films and redox transformation of polypyrrole matrix and titanocene centers immobilized in the film. Films of p(Tc3Py), Tc3Py = Tc(CH2)3NC 4H4 (Tc = Cl2TiCpCp′, Cp = C 5H5, Cp′ = C5H4) were obtained from acetonitrile solutions of monomer on a Pt disc or thin Au layer evaporated on 10 MHz quartz crystals. Polymerization efficiency, derived from the slope of the change of resonant frequency as a function of the deposition charge ranged from 54% to 75%. A gradual loss of redox activity of Tc centers during consecutive redox cycles of p(Tc3Py) film in TBAFP6/THF solutions is discussed in terms of elimination of Cl- ions from the Tc complex and accommodation of solvent molecule. The EQCM data are supported by XPS results. The preliminary studies performed in TEACl in AN solution have shown that the presence of Cl- ions in the solution markedly inhibits the loss of redox activity of Tc centers immobilized in the polymer matrix.

AB - We report electrochemical quartz crystal microbalance (EQCM) results for electrodeposition of titanocene derivatized polypyrrole p(Tc3Py) films and redox transformation of polypyrrole matrix and titanocene centers immobilized in the film. Films of p(Tc3Py), Tc3Py = Tc(CH2)3NC 4H4 (Tc = Cl2TiCpCp′, Cp = C 5H5, Cp′ = C5H4) were obtained from acetonitrile solutions of monomer on a Pt disc or thin Au layer evaporated on 10 MHz quartz crystals. Polymerization efficiency, derived from the slope of the change of resonant frequency as a function of the deposition charge ranged from 54% to 75%. A gradual loss of redox activity of Tc centers during consecutive redox cycles of p(Tc3Py) film in TBAFP6/THF solutions is discussed in terms of elimination of Cl- ions from the Tc complex and accommodation of solvent molecule. The EQCM data are supported by XPS results. The preliminary studies performed in TEACl in AN solution have shown that the presence of Cl- ions in the solution markedly inhibits the loss of redox activity of Tc centers immobilized in the polymer matrix.

KW - Bis-cyclopentadienyl titanium dichloride

KW - EQCM

KW - Electrodeposition efficiency

KW - Functionalized conducting polymers

KW - Ion exchange

KW - Polypyrrole-titanocene derivative

KW - Titanocene

KW - XPS

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SN - 0013-4686

VL - 50

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EP - 1641

JO - Electrochimica Acta

JF - Electrochimica Acta

IS - 7-8

ER -

Mechanism of redox transformation of titanocene dichloride centers immobilized inside a polypyrrole matrix - EQCM and XPS evidences

Abstract

Bibliographical note

Funding

Keywords

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