检索结果-南通市图书馆

Electrochemical behavior of [UO_2Cl_4]^(2-) in 1-ethyl-3-methylimidazolium based ionic liquids

Science China Chemistry 2012年第9期55卷 1699-1704页

作者： OGURA Toshinari SASAKI Kotoe TAKAO Koichiro ARAI Tsuyoshi IKEDA Yasuhisa Research Laboratory for Nuclear Reactors Tokyo Institute of Technology2-12-1-N1-34 O-okayamaMeguro-kuTokyo 152-8550Japan Department of Materials Science Shibaura Institute of Technology3-7-5 ToyosuKoto-kuTokyo 135-8548Japan Department of Materials and Life Science Seikei University3-3-1 Kichijoji-KitamachiMusashino-shiTokyo 180-8633Japan

In order to examine the chemical form of uranyl species in l-ethyl-3-methylimidazolium （EMI） based ionic liquids, UV-visible absorption spectra of solutions prepared by dissolving [EMI]2[UO2CI4] into a mixture of EMICI and EMIBF4 （50：50 tool%） were measured. As a result, it was confirmed that uranyl species in the mixture of EMICI and EMIBF4 existed as [UO2C14]2-. Cyclic voltammograms （CVs） of [UO2CI4]2- in the mixture were measured at 25 ~C using a Pt working electrode, a Pt wire counter electrode, and an Ag/Ag＋ reference electrode （0.01 M AgNO3, 0.1 M tetrabutylammonium perchlorate in acetonitrile） in a glove box under an Ar atmosphere. Peaks corresponding to one redox couple were observed around -1.05 V （Epc） and -0.92 V （Epa） vs. ferrocene/ferrocenium ion （Fc/Fc＋）. The potential differences between two peaks （AEp） increased from 101 to 152 mV with an increase in the scan rate from 50 to 300 mV s-1, while the （Epc ＋ Epa）/2 value was constant, -0.989 V vs. Fc/Fc＋ regardless of the scan rate. Furthermore, the diffusion coefficient of [UO2C14]2 and the standard rate constant were es- timated to be 3.7× 10^-8 cm^2 s 1 and （2.7-2,8） × 10^-4 cm s-! at 25 ℃. By using the diffusion coefficient and the standard rate constant, the simulation of CVs was performed based on the reaction, [UO2C14]2- ＋ e- = [UO2C14]3-. The simulated CVs were found to be consistent with the experimental ones. From these results, it is concluded that [UO2C14]2- in the mixture of EMIC1 and EMIBF4 is reduced to [UO2C14]3- quasi-reversibly at -0.989 V vs. Fc/Fc＋.

关键词： uranyl chloride ionic liquids electrochemistry cyclic voltammetry

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：