...When unstable and short-lived molecules are trapped in a rigid solvent, the molecules become stable and their life spans are extended, making it easier to measure their optical properties, photochemical reactions, and radiation chemical reactions. A typical rigid solvent, EPA, is a mixture of diethyl ether, 5,2-methylbutane (isopentane), and 2 parts ethyl alcohol, and is named after the initials of the solvent's English name. EPA dissolves many organic compounds well and becomes a stable glassy solvent at the temperature of liquid nitrogen. ... *Some of the terminology that refers to "EPA (rigid solvent)" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…不安定で寿命の短い分子を剛性溶媒にとじ込めると,分子は安定になり寿命も長くなって,その光物性,光化学反応,放射線化学反応などの測定が容易になる。代表的な剛性溶媒EPAはジエチルエーテル5,2‐メチルブタン(イソペンタン)5,エチルアルコール2の割合で混合したもので,溶媒の英語名の頭文字をとってEPAという。EPAは多くの有機化合物をよく溶かし,液体窒素の温度で安定なガラス状の溶媒となる。… ※「EPA(剛性溶媒)」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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