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σσ* Transition in anti,cisoid Alternating Oligosilanes:  Clear-Cut Evidence for Suppression of Conjugation Effect by a cisoid Turn

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journal contribution
posted on 2003-05-28, 00:00 authored by Hayato Tsuji, Masayoshi Terada, Akio Toshimitsu, Kohei Tamao
On the basis of the UV absorption spectra of the anti,cisoid alternating oligosilanes, the first experimental clear-cut evidence was presented for the generally accepted idea that the σ conjugation in polysilanes does not effectively extend through a tetrasilane fragment with a small dihedral angle such as a cisoid turn.