標題: Local structure formation in alkyl-imidazolium-based ionic liquids as revealed by linear and nonlinear Raman spectroscopy
作者: Iwata, Koichi
Okajima, Hajime
Saha, Satyen
Hamaguchi, Hiro-O
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
公開日期: 1-十一月-2007
摘要: We show several pieces of Raman spectroscopic evidence that are indicative of local structure formation in imidazolium-based ionic liquids. Low-frequency Raman spectra of C(n)mimX, where C(n)mim stands for 1-alkyl(CnH2n+1)-3-methylimidazolium cation and X represents the anion, exhibit broad bands assignable to collective modes of local structures. Spatial distributions of coherent anti-Stokes Raman scattering (CARS) signals from C(n)mim[PF(6)l are consistent with local structures whose size increases with increasing n. Picosecond Raman spectra of S, trans-stilbene as a "picosecond Raman thermometer" show microscopic thermal inhomogeneity ascribable to local structure formation in C(2)mimTf(2)N and C(4)mimTf(2)N. We also describe two novel phenomena that we believe are relevant to extraordinary nanoenvironments generated by local structures in a magnetic ionic liquid C(4)mim[FeCl4].
URI: http://dx.doi.org/10.1021/ar700074c
http://hdl.handle.net/11536/10159
ISSN: 0001-4842
DOI: 10.1021/ar700074c
期刊: ACCOUNTS OF CHEMICAL RESEARCH
Volume: 40
Issue: 11
起始頁: 1174
結束頁: 1181
顯示於類別:期刊論文


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  1. 000251166000013.pdf