Exciplex emission from amphiphilic polysilanes bearing ammonium moieties

Tetsuya Yamaki, Yukio Nakashiba, Keisuke Asai, Kenkichi Ishigure, Shuhei Seki, Seiichi Tagawa, Hiromi Shibata

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We were the first to observe two emission bands in the visible region for some kinds of ammonium-type amphiphilic polysilanes both in solutions and in thin films. One, a broad emission band at 400-500 nm not due to a σ * → σ transition, was observed only for methylphenylsilane-based polymer solutions. The appearance of this low-energy emission is reasonably explained by considering the intramolecular exciplex formation between a Si-conjugated main chain and an ammonium site in the same monomer unit. The other, an emission band at the longer wavelength (around 560 nm), was found in the solvent-cast films where each molecule is randomly located, in addition to that observed for the solutions. This emission, which was not observed for the oriented LB films, is considered to originate from an inter molecular interaction.

Original languageEnglish
Pages (from-to)369-373
Number of pages5
JournalJournal of Nuclear Materials
Publication statusPublished - 1997 Sept 1


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