The Influence of Silica Nanoparticles on Ionic Liquid Behavior: A Clear Difference between Adsorption and Confinement

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	The Influence of Silica Nanoparticles on Ionic Liquid Behavior: A Clear Difference between Adsorption and Confinement
	Wang, Yaxing ; Li, Cheng ; Guo, Xiaojing ; Wu, Guozhong
刊名	INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
	2013
卷号	14 期号:10 页码:CONCATENATE(Sheet1!I360,-Sheet1!J360)
ISSN号	1422-0067
英文摘要	The phase behaviors of ionic liquids (ILs) confined in nanospace and adsorbed on outer surface of nanoparticles are expected to be different from those of the bulk. Anomalous phase behaviors of room temperature ionic liquid tributylhexadecylphosphonium bromide (P44416Br) confined in ordered mesoporous silica nanoparticles with average pore size 3.7 nm and adsorbed on outer surface of the same silica nanoparticles were reported. It was revealed that the melting points (T-m) of confined and adsorbed ILs depressed significantly in comparison with the bulk one. The T-m depressions for confined and adsorbed ILs are 8 degrees C and 14 degrees C, respectively. For comparison with the phase behavior of confined P44416Br, 1-butyl-3-methylimidazolium bromide (BmimBr) was entrapped within silica nanopores, we observed an enhancement of 50 degrees C in T-m under otherwise similar conditions. The XRD analysis indicates the formation of crystalline-like phase under confinement, in contrast to the amorphous phase in adsorbed IL. It was confirmed that the behavior of IL has clear difference. Moreover, the complex - stacking and H-bonding do not exist in the newly proposed phosphonium-based IL in comparison with the widely studied imidazolium-based IL. The opposite change in melting point of P44416Br@SiO2 and BmimBr@SiO2 indicates that the cationic species plays an important role in the variation of melting point.
收录类别	SCI
语种	英语
WOS记录号	WOS:000328620900097
公开日期	2014-06-13
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/13955]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Wang, Yaxing,Li, Cheng,Guo, Xiaojing,et al. The Influence of Silica Nanoparticles on Ionic Liquid Behavior: A Clear Difference between Adsorption and Confinement[J]. INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES,2013,14(10):CONCATENATE(Sheet1!I360,-Sheet1!J360).
APA	Wang, Yaxing,Li, Cheng,Guo, Xiaojing,&Wu, Guozhong.(2013).The Influence of Silica Nanoparticles on Ionic Liquid Behavior: A Clear Difference between Adsorption and Confinement.INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES,14(10),CONCATENATE(Sheet1!I360,-Sheet1!J360).
MLA	Wang, Yaxing,et al."The Influence of Silica Nanoparticles on Ionic Liquid Behavior: A Clear Difference between Adsorption and Confinement".INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 14.10(2013):CONCATENATE(Sheet1!I360,-Sheet1!J360).