Fw: [新聞] 庫利基中間體 交大證實存在
※ [本文轉錄自 Gossiping 看板 #1HQOARJQ ]
作者: coldman519 (我歌月徘徊 我舞影凌亂) 看板: Gossiping
標題: [新聞] 庫利基中間體 交大證實存在
時間: Sun Apr 14 00:06:47 2013
(中央社記者陳至中台北13日電)交通大學應用化學系研究團隊,透過自行組裝的光譜儀
偵測,證實被提出60年的「庫利基中間體」,確實存在,登上國際權威期刊「Science(科
學)」。
「庫利基中間體(Criegee intermediate)」是大氣化學中的重要反應中間體,影響空氣
污染、酸雨、氣候變遷等機制。但由於其活性大、壽命短,自1949年被提出後,始終沒有
科學家能偵測到它的存在。
交大應用化學系教授李遠鵬、魏恆理(Henryk Witek)帶領的研究團隊,利用自行組裝的
「第二代步進式傅式轉換紅外吸收光譜儀」,成功偵測到「庫利基中間體」的紅外光譜,
並進一步進行高階理論計算,得出其振動頻率和紅外吸收強度。
研究團隊指出,紅外光譜就像是分子的「指紋」,每種分子都有獨特的結構。交大發展光
譜儀技術已10餘年,在學界佔有領先地位,這次除了一舉登上權威期刊「Science」,還讓
編輯特地撰寫「觀點」文章,介紹這項發現的貢獻和影響。
研究團隊表示,庫利基中間體的重要性,在於能進一步轉化為「羥基」、「醛」、「酮類
分子」等,是大氣污染物被氧化的起始。交大研究提供監測相關化學反應的方法,未來人
類可以藉此更加瞭解大氣的機制。1020413
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4/13交大校慶,算是給交大的一份生日禮吧! XD
附上 Science Journal原文
http://www.sciencemag.org/content/340/6129/174.full?rss=1
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※ 編輯: coldman519 來自: 140.113.90.184 (04/14 00:19)
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※ 轉錄者: i19890813 (140.114.45.247), 時間: 04/15/2013 10:04:53
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