Microscopic solvation environments in a prototype room-temperature ionic liquid as elucidated by resonance Raman spectroscopy of iodine and bromine

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• 作者：Satyen Saha^a ; Hajime Okajima^b ; Osamu Homma^c ; Hiro-o Hamaguchi^b ; ^c ; ^{hhama@chem.s.u-tokyo.ac.jp} ; ^{hhama@nctu.edu.tw}
• 关键词：Ionic liquid ; Solvation environment ; Microscopic heterogeneity ; Raman spectroscopy ; Iodine/bromine
• 刊名：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
• 出版年：2017
• 出版时间：5 April 2017
• 年：2017
• 卷：176
• 期：Complete
• 页码：79-82
• 全文大小：636 K
• 卷排序：176

文摘

Microscopic solvation environments in a prototype ionic liquid, bmimTf2N, have been studied for the first time with Resonance Raman spectroscopy using the smallest possible probe molecules; bromine and iodine. Resonance Raman measurements have concomitantly detected free X2 and Xn- (X = Br or I) in bmimTf2N, indicating at least two distinct solvation environments. It is inferred that these distinct environments are; non-polar environments that solvate free X2 (nonpolar species) and polar environments that stabilize Xn-(polar species). These two distinct solvation environments are most likely to arise from microscopic structural heterogeneity of ionic liquids.