东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

Property variation of ionic liquid [Bmim][AuCl4] immobilized on carboxylated polystyrene submicrospheres with a small surface area

ISSN号：1000-6818
期刊名称：《物理化学学报》
时间：0
分类：TQ325.2[化学工程—合成树脂塑料工业] O646.1[理学—物理化学;理学—化学]
作者机构：[1]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China, [2]Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China, [3]Graduate University of Chinese Academy of Sciences, Beijing 100049, China
相关基金：This work was supported by the National Natural Science Foundation of China （11079007, 51073146, 51103143, 11005148, 20973192 and 10705046）.

作者： HE YaXing[1,3], FU HaiYing[1], LI Cheng[1], JI Xiang[2], GE XueWu[2], ZOU Yang[1], JIANG Zheng[1], XU HongJie[1], WU GuoZhong[1]

关键词：离子液体, 聚苯乙烯, 表面积, 羧基, X射线吸收精细结构, 差示扫描量热法, 化学基团, 变异, ionic liquid, polystyrene submicrospheres, immobilization, phase behavior, XAFS

中文摘要：

以便在使不能调动的种类上理解表面化学药品组的效果，包含Au 基于imidazolium 的离子的液体( IL )[ Bmim ][ AuCl4 ]有意在聚苯乙烯( PS )上被使不能调动 submicrospheres ( d 300 nm )与一个很小的表面区域( 410 m2/g )，它在表面上拥有carboxyl一半( COONa 或 COOH )。行为使不能调动[Bmim ][AuCl4 ] 在二上， submicrospheres 的类型被传播调查电子显微镜学(TEM ) ，微分扫描热量测定(DSC ) ，和粉末 X 光检查衍射(XRD ) 。这被揭示融化的点(T m )[Bmim ][AuCl4 ] 那在 PS-COONa 上被使不能调动， PS-COOH submicrospheres 被 2.7 和 4.1 减少

英文摘要：

In order to understand the effect of surface chemical groups on the immobilized species, Au-containing imidazolium-based ionic liquid （IL） [Bmim][AuCl4] was intentionally immobilized on polystyrene （PS） submicrospheres （d-300 nm） with a very small surface area （4-10 m2/g）, which possess carboxyl-moiety （COONa or COOH） on the surface. The behavior of immobilized [Bmim][AuCl4] on the two types of submicrospheres was investigated by transmission electron microscopy （TEM）, differential scanning calorimetry （DSC）, and powder X-ray diffraction （XRD）. It was revealed that the melting points （Tin） of [Bmim][AuC14] that had been immobilized on PS-COONa and PS-COOH submicrospheres were decreased by 2.7 and 4.1℃, respectively. The interaction mechanism between the IL and submicrosphere surface moieties was further analyzed by X-ray absorption fine struc- ture （XAFS） analysis. The data indicated that the coordination environment of Au species changed markedly when [Bmim] [AuCl4] was immobilized on the surfaces of PS-COONa and PS-COOH submicrospheres, as illustrated by the decrease in white line peak intensity. The effect of surface COOH groups on Tm depression and the white line peak intensity of the XANES spec- trum is more pronounced than that of COONa groups, most likely due to the possible hydrogen bond formation between the COOH group and [Bmim]＋.