Preparation of branched oligogermynes and their micropatterning by ultraviolet irradiation

Kunio Mochida, Tomoharu Ohkawa, Hiroki Kawata, Akira Watanabe, Osamu Ito, Minoru Matsuda

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16 Citations (Scopus)

Abstract

Branced oligogermynes were prepared both by Wurtz coupling reactions of alkyl- and phenyl-trichlorogermanes with sodium metal and by the reaction of alkyltrichlorogermanes using of samarium(II) diiodide. Upon ultraviolet irradiation of oligo(phenylgermyne) in air, the germanium-germanium bond in an oligo(phenylgermyne) film changed into a digermoxane chain. The laser flash photolysis of the oligo(phenylgermyne) film showed the formation of a germyl radical as a reactive intermediate during photodegradation. The formation of germanium carbide (Ge-C) and germanium dioxide (GeO2) was observed upon a heat treatment of unirradiated and irradiated oligo(phenylgermyne) films, respectively. A relatively high-resolution GeC/GeO2 micropatterning was obtained by combining the photochemical and thermal properties of branced oligogermynes.

Original languageEnglish
Pages (from-to)2993-2998
Number of pages6
JournalBulletin of the Chemical Society of Japan
Volume69
Issue number10
DOIs
Publication statusPublished - 1996 Oct

ASJC Scopus subject areas

  • Chemistry(all)

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