ヒダントイン誘導体を配位子とする1価金錯体とその特性

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  • 佐々木 晴子
    田中貴金属工業㈱ 湘南工場 日本エレクトロプレイティング・エンジニヤース㈱

書誌事項

タイトル別名
  • Gold（I）Complexes of Hydantoin Derivatives and Their Properties
  • ヒダントイン ユウドウタイ オ ハイイシ ト スル 1カキン サクタイ ト ソノ トクセイ

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説明

<p>Among hydantoin derivatives, a monovalent gold complex was obtained when 1-methylhydantoin（MH）and hydantoin（HY）were used as ligands. These are more beneficial for use in gold plating solutions than trivalent gold complex of 5,5-dimethylhydantoin（DMH）. Moreover, these complexes can be extracted as crystals. Therefore, the chlorine concentration, constituting a major impurity in gold plating for the electronics industry, can be kept low. Each crystal coordinated two hydantoin derivatives to gold and had water of crystallization. The gold-HY complex solution is stable at pH 5-9. Moreover, no change in pH or decomposition occurs even when hydrogen peroxide is added. Higher stability can be expected in the gold plating solution than for gold sulfite.</p><p>A neutral（pH 6-7）gold plating solution using the gold-HY complex was investigated. When a large amount of DMH as the complexing agent is added in anticipation of an increase in the plating bath stability, the deposited film appeared to be dark brown. When DMH in the composition of the plating solution was set to a molar equivalent ratio with gold of 0.6-1, the deposited film appearance was bright yellow.</p>

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  • 表面技術

    表面技術 71 (12), 828-832, 2020-12-01

    一般社団法人 表面技術協会

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