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Radical ions of poly(phenylsilyne) and poly(phenylgermyne)
Author(s) -
Watanabe Akira,
Komatsubara Tadaharu,
Matsuda Minoru,
Yoshida Yoichi,
Tagawa Seiichi
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021960422
Subject(s) - radiolysis , delocalized electron , photochemistry , radical ion , polymer , chemistry , absorption (acoustics) , conjugated system , absorption band , radical , ion , absorption spectroscopy , ultrafast laser spectroscopy , electron paramagnetic resonance , polymer chemistry , materials science , spectroscopy , organic chemistry , nuclear magnetic resonance , physics , quantum mechanics , optics , composite material
Poly(phenylsilyne) and poly(phenylgermyne), which have a network Si‐ and Ge‐skeleton, were synthesized by electrochemical reduction of trichlorophenylsilane and trichlorophenylgermane, respectively. The poly(phenylsilyne) showed broad absorption and emission bands that are characteristic of silicon network polymers. Similarly broad absorption and emission bands were observed for the poly(phenylgermyne). Radical anions and radical cations of poly(phenylsilyne) and poly(phenylgermyne) were produced by pulse radiolysis. The radical ions of these network polymers showed broad transient absorption bands from the UV to the IR region. Within 200 ns after pulse radiolysis, the absorption band of the radical cation in the UV region decreased, whereas the band in the IR region increased. The time‐dependent spectral change of the radical cation suggests the formation of a change resonance band of the delocalized positive charge on the σ‐conjugated polymer chain. In contrast to the radical cation, the radical anion of the network polymers did not show a spectral change.