Usefulness of aqueous micellar media for electrosynthesis of poly(N-phenylpyrrole). Characterization and optical properties
Scheme of the proposed multiple-step mechanism of the poly(N-PhPy) film formation in acid aqueous micellar medium, showing the loss of a pyrrolyl group and the incorporation of one oxygen atom, in the case of a “modified” tetramer. [Display omitted] ► Electrosynthesis of poly-N-phenyl-pyrrole [poly(...
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Published in | Synthetic metals Vol. 161; no. 15; pp. 1483 - 1495 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
01.08.2011
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Scheme of the proposed multiple-step mechanism of the poly(N-PhPy) film formation in acid aqueous micellar medium, showing the loss of a pyrrolyl group and the incorporation of one oxygen atom, in the case of a “modified” tetramer.
[Display omitted]
► Electrosynthesis of poly-N-phenyl-pyrrole [poly(N-PhPy)] by anodic oxidation of N-PhPy on Pt. ► Acid aqueous micellar medium (0.1
M sodium dodecyl sulfate, SDS). ► Formation of electroactive poly(N-PhPy) films. ► Characterization of poly(N-PhPy) films (oligomers) by MALDI-TOF, FT-IR and XPS. ► Weak red-shifts of the poly(N-PhPy) UV–Vis absorption and fluorescence spectra maximums relative to N-PhPy.
Poly-N-phenyl-pyrrole [poly(N-PhPy)] was electrosynthesized by anodic oxidation of N-PhPy on Pt electrode in acid aqueous micellar medium (0.1
M sodium dodecyl sulfate (SDS)
+
1.93
M HClO
4 in 84/16 water/butanol v/v), using cyclic voltammetry (CV), chronoamperometry and chronopotentiometry. Electroactive poly(N-PhPy) films were formed upon scanning the potential (
E) between 0.0 and 1.4
V/SCE, under controlled potential (
E
=
0.9–1.3
V/SCE) or controlled current density (
J
=
0.125–2.0
mA/cm
2). The poly-NPhPy films were characterized by CV, MALDI-TOF mass spectrometry, FT-IR and X-ray photoelectron spectra (XPS), and their morphology was studied by scanning electron microscopy (SEM). Their optical properties, including electronic absorption and fluorescence spectra, were also investigated. A multiple-step mechanism for the poly(N-PhPy) films formation in micellar medium, based on the MALDI-TOF, FT-IR and XPS results, was proposed. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0379-6779 1879-3290 |
DOI: | 10.1016/j.synthmet.2011.04.007 |