TY - JOUR
T1 - Resonance Raman and ultraviolet to infrared absorption studies of positive polarons and bipolarons in sulfuric-acid-treated poly(p-phenylenevinylene)
AU - Sakamoto, Akira
AU - Furukawa, Yukio
AU - Tasumi, Mitsuo
PY - 1994/1/1
Y1 - 1994/1/1
N2 - The resonance Raman and infrared spectra of sulfuric-acid-treated poly(p-phenylenevinylene) (PPV) have been observed and analyzed on the basis of the resonance Raman spectra of the radical-cation and dication species of the model compounds CH3(C6H4CH=CH)nC6H 4CH3 (PVn, n = 1-3), which correspond, respectively, to positive polarons and bipolarons in PPV. Sulfuric-acid-treated PPV is considered to contain a considerable amount of positive polarons having a more or less uniform length and a relatively small amount of positive bipolarons. Of the two electronic absorption bands at 2.25 and 1.00 eV of sulfuric-acid-treated PPV, the former absorption band is due to the positive polarons, whereas the latter has overlapping components arising from the positive polarons and bipolarons. It is suggested that the high electrical conductivity of sulfuric-acid-treated PPV may be due to formation of a polaron lattice, a regular array of polarons.
AB - The resonance Raman and infrared spectra of sulfuric-acid-treated poly(p-phenylenevinylene) (PPV) have been observed and analyzed on the basis of the resonance Raman spectra of the radical-cation and dication species of the model compounds CH3(C6H4CH=CH)nC6H 4CH3 (PVn, n = 1-3), which correspond, respectively, to positive polarons and bipolarons in PPV. Sulfuric-acid-treated PPV is considered to contain a considerable amount of positive polarons having a more or less uniform length and a relatively small amount of positive bipolarons. Of the two electronic absorption bands at 2.25 and 1.00 eV of sulfuric-acid-treated PPV, the former absorption band is due to the positive polarons, whereas the latter has overlapping components arising from the positive polarons and bipolarons. It is suggested that the high electrical conductivity of sulfuric-acid-treated PPV may be due to formation of a polaron lattice, a regular array of polarons.
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U2 - 10.1021/j100068a025
DO - 10.1021/j100068a025
M3 - Article
AN - SCOPUS:0000190604
VL - 98
SP - 4635
EP - 4640
JO - Journal of Physical Chemistry
JF - Journal of Physical Chemistry
SN - 0022-3654
IS - 17
ER -