<総説>プラズマ照射により生成する固体糖類のラジカル解析とその反応性に関する研究
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我々は本研究により,室温において固体グルコース系糖類に生成するプラズマ誘起ラジカルの構造,およびその反応に関する一般性を確立した。短時間プラズマ照射により,種々のグルコース系糖類(単糖,二糖,多糖)に生成するラジカルのESRスペクトルはそれぞれ異なり複雑なパターンを示したが,それらはすべて基本的に類似した成分スペクトルの異なった構成比により成立していることが明らかになった。さらに,いずれの糖類に生成するラジカルも同類の反応経路が進行し,グルコ一ス単位の各炭素部位より水素引き抜き反応によりヒドロキシルアルキルラジカルが生成し,その後一部が脱水反応によりアシルラジカルに変換することを明らかにした。なお多糖類,特にセルロースのアルキル(アルコキシル)誘導体に生成するラジカルはダングリングボンドを多く含有し,架橋反応進行を示唆する結果が得られた。さらに,種々の糖ラジカルと酸素との反応性には差異が見られ,それはオリゴ糖と多糖の間の結晶構造の相違に起因することを明らかにした。
- 岐阜薬科大学の論文
- 2000-06-30
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