Synthesis, characterization and electrochemical polymerization of eight transition-metal complexes of 5-amino-l,10-phenanthroline

Leonidas G Bachas, Lawrence Cullen, Richard S. Hutchins, Donna L. Scott

Research output: Contribution to journalArticle

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Abstract

The ability to prepare polymer films on the surface of glassy carbon electrodes (GCEs) by electrochemical polymerization of transition-metal complexes of 5-amino-l,10-phenanthroline (aphen) was investigated. Eight different metal ions (Mn II, Fe II, Co II, Ni II, Cu II, Zn II, Ru II and Os II) were studied. A simple and rapid method for the synthesis of the complexes with Mn II, Co II, Ni II, Cu II and Zn II was also elaborated. The surface coverage obtained through electrochemical polymerization of the complexes on the GCEs can be related to the redox potential of the metal. The iron(n) and ruthenium(n) complexes generated the greatest polymer film surface coverages (≈10 -8 mol cm -2), followed by the osmium(n) and cobalt(n) complexes (≈10 -9 mol cm -2). Electrochemical polymerization studies with aphen, 5-nitro-l,10-phenanthro!ine (nphen) and the metal complex [Fe(nphen) 3] 2+ provided further evidence that the oxidative electropolymerization mechanism for these complexes is initiated by sweeping through the oxidative potential of the aphen ligand (+1.35 V vs. Ag-AgCl).

Original languageEnglish (US)
Pages (from-to)1571-1577
Number of pages7
JournalJournal of the Chemical Society, Dalton Transactions
Issue number9
StatePublished - 1997
Externally publishedYes

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Phenanthrolines
Electropolymerization
Coordination Complexes
Transition metals
Glassy carbon
Polymer films
Osmium
Electrodes
Ruthenium
Cobalt
Metal ions
Iron
Metals
Ligands

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Synthesis, characterization and electrochemical polymerization of eight transition-metal complexes of 5-amino-l,10-phenanthroline. / Bachas, Leonidas G; Cullen, Lawrence; Hutchins, Richard S.; Scott, Donna L.

In: Journal of the Chemical Society, Dalton Transactions, No. 9, 1997, p. 1571-1577.

Research output: Contribution to journalArticle

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AB - The ability to prepare polymer films on the surface of glassy carbon electrodes (GCEs) by electrochemical polymerization of transition-metal complexes of 5-amino-l,10-phenanthroline (aphen) was investigated. Eight different metal ions (Mn II, Fe II, Co II, Ni II, Cu II, Zn II, Ru II and Os II) were studied. A simple and rapid method for the synthesis of the complexes with Mn II, Co II, Ni II, Cu II and Zn II was also elaborated. The surface coverage obtained through electrochemical polymerization of the complexes on the GCEs can be related to the redox potential of the metal. The iron(n) and ruthenium(n) complexes generated the greatest polymer film surface coverages (≈10 -8 mol cm -2), followed by the osmium(n) and cobalt(n) complexes (≈10 -9 mol cm -2). Electrochemical polymerization studies with aphen, 5-nitro-l,10-phenanthro!ine (nphen) and the metal complex [Fe(nphen) 3] 2+ provided further evidence that the oxidative electropolymerization mechanism for these complexes is initiated by sweeping through the oxidative potential of the aphen ligand (+1.35 V vs. Ag-AgCl).

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