Photoemission study on poly(pyridine-2,5-diyl), poly(2,2′-bipyridine-5,5′-diyl), and their K-doped states

T. Miyamae, D. Yoshimura, Hisao Ishii, Y. Ouchi, Takafumi Miyazaki, T. Koike, T. Yamamoto, K. Seki

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Ultraviolet photoelectron spectra were measured using synchrotron radiation for two kinds of π-conjugated polymers, poly(pyridine-2,5-diyl) (PPy) and poly(2,2′-bipyridine-5,5′-diyl) (PBPy) which exhibit n-type electrically conducting properties. The two compounds show similar spectra, and they were analyzed with MO calculations. Upon potassium doping of PBPy, two new states appeared in the originally empty energy gap. This finding indicates that bipolaron bands are formed in K-doped PBPy. While K-doped PPy also shows similar gap states, it requires higher dopant concentration to create bipolaron bands than in the case of K-doped PBPy. The difference of the dependence on dopant concentration between K-doped PPy and K-doped PBPy is discussed based on the conformational difference between these polymers.

Original languageEnglish
Pages (from-to)399-402
Number of pages4
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume78
Publication statusPublished - May 1996
Externally publishedYes

Fingerprint

Photoemission
Pyridine
pyridines
photoelectric emission
Doping (additives)
polymers
potassium
synchrotron radiation
photoelectrons
Conjugated polymers
Photoelectrons
Synchrotron radiation
conduction
Potassium
Polymers
Energy gap
pyridine

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

Cite this

Photoemission study on poly(pyridine-2,5-diyl), poly(2,2′-bipyridine-5,5′-diyl), and their K-doped states. / Miyamae, T.; Yoshimura, D.; Ishii, Hisao; Ouchi, Y.; Miyazaki, Takafumi; Koike, T.; Yamamoto, T.; Seki, K.

In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 78, 05.1996, p. 399-402.

Research output: Contribution to journalArticle

Miyamae, T. ; Yoshimura, D. ; Ishii, Hisao ; Ouchi, Y. ; Miyazaki, Takafumi ; Koike, T. ; Yamamoto, T. ; Seki, K. / Photoemission study on poly(pyridine-2,5-diyl), poly(2,2′-bipyridine-5,5′-diyl), and their K-doped states. In: Journal of Electron Spectroscopy and Related Phenomena. 1996 ; Vol. 78. pp. 399-402.
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AU - Ishii, Hisao

AU - Ouchi, Y.

AU - Miyazaki, Takafumi

AU - Koike, T.

AU - Yamamoto, T.

AU - Seki, K.

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