In-situ spectroelectrochemical studies on poly(1,8-diaminonaphthalene)

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:43071

Ruan, M; Park, S M ^[1]; Shim, Y B ^[2]

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1. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Chemistry
2. Pusan National Univ. (Korea, Republic of). Dept. of Chemistry

A functionalized conducting polymer, poly(1,8-diaminonaphthalene), has been studied employing in-situ spectroelectrochemical techniques. Results indicate that the polymer shows an absorption band maximum at 391 mn in its reduced state. Upon oxidation of the polymer, two absorption maxima, one at 491 nm and the other at 582 nm, which are assigned to electronic transitions of polarons and bipolarons, are observed. The latter two bands do not disappear completely upon its reduction. This is perhaps because its ground state contains a significant fraction of quinoid structure, which is isoelectronic with the bipolaron and is not easily reduced. This also explains why the polymer is conducting even in the reduced state. The bipolaronic state might have been introduced when the polymer is prepared and stay in the unreduced state even after its reduction. Spectra obtained when the polymer is doped with Ag{sup +} display a new absorption band at 478 nm in the reduced state. This band is assigned to the metal-ligand charge transfer transition.

• OSTI ID: 43071
• Report Number(s): CONF-931024--; ISBN 1-56677-033-5
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ABSORPTION SPECTRA
CYCLOALKANES
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTROCHEMISTRY
EXPERIMENTAL DATA
ORGANIC POLYMERS
REDUCTION
SILVER
VOLTAMETRY