Preparation of branched oligogermynes and their micropatterning by ultraviolet irradiation

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

doi:10.1246/bcsj.69.2993

Preparation of branched oligogermynes and their micropatterning by ultraviolet irradiation

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

Center for Mineral Processing and Metallurgy (CMPM)

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	2993-2998
Number of pages	6
Journal	Bulletin of the Chemical Society of Japan
Volume	69
Issue number	10
DOIs	https://doi.org/10.1246/bcsj.69.2993
Publication status	Published - 1996 Oct

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Chemistry(all)

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title = "Preparation of branched oligogermynes and their micropatterning by ultraviolet irradiation",

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.",

author = "Kunio Mochida and Tomoharu Ohkawa and Hiroki Kawata and Akira Watanabe and Osamu Ito and Minoru Matsuda",

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T1 - Preparation of branched oligogermynes and their micropatterning by ultraviolet irradiation

AU - Mochida, Kunio

AU - Ohkawa, Tomoharu

AU - Kawata, Hiroki

AU - Watanabe, Akira

AU - Ito, Osamu

AU - Matsuda, Minoru

PY - 1996/10

Y1 - 1996/10

N2 - 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.

AB - 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.

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JO - Bulletin of the Chemical Society of Japan

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Preparation of branched oligogermynes and their micropatterning by ultraviolet irradiation

Abstract

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