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	[C_4mim][PF_6]和[C_4mim][NTf_2]离子液体辐射诱导的相行为及荧光行为变化; Radiation-Induced Changes of Phase Behavior and Fluorescence Properties of the Ionic Liquids [C(4)mim][PF6] and [C(4)mim][NTf2]
	袁立永 ; 彭静 ; 李久强 ; 翟茂林
	2010
关键词	离子液体 相行为 结晶 荧光行为 红边效应 Ionic liquids Phase behavior Crystallization Fluorescence property Red edge effect
英文摘要	离子液体因其低挥发性,高热稳定性及优良的萃取性能被认为是萃取分离放射性核素的新一代绿色溶剂,而研究离子液体本身的辐射效应是其实际应用的重要前提.本文以60Co为辐射源,系统研究了γ辐照对两种常见的憎水性咪唑离子液体1-丁基-3-甲基咪唑六氟磷酸盐([C4mim][PF6])和1-丁基-3-甲基咪唑三氟甲基磺酰胺酸盐([C4mim][NTf2])的相行为及荧光行为的影响.在相行为方面,γ辐照使离子液体的结晶驰豫时间增加,导致其低温结晶延迟.在荧光行为方面,γ辐照后离子液体的荧光光谱保持原有的"红边效应(red edge effect)",但随吸收剂量增加,光谱整体发生红移(最大移动幅度达150n...; The application of room-temperature ionic liquids (RTILs) to the separation of high level radioactive nuclides from waste water demands a comprehensive knowledge of the radiation effects on the RTILs Herein, we report a systematic study on the influence of gamma-irradiation on the phase behavior and fluorescence properties of the widely used hydrophobic room-temperature ionic liquids [C(4)mim]X, where [C(4)mim](-) is 1-butyl-3-methylimidazolium and X- is hexafluorophosphate (PF6-) and bis(trifluoromethylsulfonyl)imide (NTf2-). respectively It was found that the relaxation time of crystallization in the ILs increased during gamma-irradiation leading to a delay before crystallization The irradiated ILs showed an obvious "red edge effect" similar to that in unirradiated ILs The whole spectrum, however, shifted to a longer wavelength with increasing the dose and the maximum variation was ca 150 nm Furthermore, the red edge effect" was unexpectedly observed in an acetonitrile solution of irradiated ILs and the whole spectrum shifted towards a shorter wavelength with increasing the dilution All the above-mentioned observations relating to the phase behavior and fluorescence properties are attributed to a change in the spatial correlation between cations and anions in the ILs after gamma-irradiation; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000276958400025&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 4; 04; 981-987; 26
语种	中文
出处	SCI ; 万方 ; 知网
出版者	物理化学学报
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/80258]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	袁立永,彭静,李久强,等. [C_4mim][PF_6]和[C_4mim][NTf_2]离子液体辐射诱导的相行为及荧光行为变化, Radiation-Induced Changes of Phase Behavior and Fluorescence Properties of the Ionic Liquids [C(4)mim][PF6] and [C(4)mim][NTf2]. 2010-01-01.

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