Electronic Properties of p-Type Doped Copolymers Consisting of Oligothienylene and Disilanylene Units

Autor: Hiroki Ago, Kazuyoshi Tanaka, Atsutaka Kunai, Mitsuo Ishikawa, Takako Kuga, Tokio Yamabe
Rok vydání: 1997
Předmět:
Zdroj: Chemistry of Materials. 9:1159-1165
ISSN: 1520-5002
0897-4756
DOI: 10.1021/cm960554u
Popis: In association with the previous theoretical prediction on the ferromagnetic spin correlation in p-type doped poly[disilanylene(thienylene)n] (PDST-n, n = 1−5), we have actually prepared these samples and examined their electronic properties by the combination of cyclic voltammetry (CV), ultraviolet−visible−near-infrared (UV−vis−NIR), electron spin resonance (ESR), and infrared (IR) spectroscopic measurements. It has been confirmed that electrons are removed mainly from oligothienylene units. A spin generated by the doping was found to be localized at 3pπ-atomic orbitals (AOs) of sulfur atom at n = 1. For n = 2−5 a spin was the polaronic π-spin delocalized within an oligothienylene unit. These natures of radical spins are in accordance with the previous theoretical study. However, the spin concentration of p-type doped polymers was considerably small (1 spin/ca. 400 oligothienylene units), possibly due to the aggregation of the oligothienylene units around the dopant and to the degradation of disilanylene...
Databáze: OpenAIRE
Popis
Abstrakt:In association with the previous theoretical prediction on the ferromagnetic spin correlation in p-type doped poly[disilanylene(thienylene)n] (PDST-n, n = 1−5), we have actually prepared these samples and examined their electronic properties by the combination of cyclic voltammetry (CV), ultraviolet−visible−near-infrared (UV−vis−NIR), electron spin resonance (ESR), and infrared (IR) spectroscopic measurements. It has been confirmed that electrons are removed mainly from oligothienylene units. A spin generated by the doping was found to be localized at 3pπ-atomic orbitals (AOs) of sulfur atom at n = 1. For n = 2−5 a spin was the polaronic π-spin delocalized within an oligothienylene unit. These natures of radical spins are in accordance with the previous theoretical study. However, the spin concentration of p-type doped polymers was considerably small (1 spin/ca. 400 oligothienylene units), possibly due to the aggregation of the oligothienylene units around the dopant and to the degradation of disilanylene...
ISSN:15205002
08974756
DOI:10.1021/cm960554u