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学科主题: 物理化学
题名: Low-temperature heat capacities of 1-alkyl-3-methylimidazolium bis(oxalato)borate ionic liquids and the influence of anion structural characteristics on thermodynamic properties
作者: Yang, Miao1;  Zhao, Jun-Ning2;  Liu, Qing-Shan1;  Sun, Li-Xian2;  Yan, Pei-Fang1;  Tan, Zhi-Cheng1, 2;  Welz-Biermann, Urs1
通讯作者: 谭志诚 ;  UrsWelz-Biermann
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2011
DOI: 10.1039/c0cp01744b
卷: 13, 期:1, 页:199-206
收录类别: SCI
文章类型: Article
部门归属: 2;DNL19
项目归属: 207;1904
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
摘要: Low-temperature heat capacities of 1-alkyl-3-methylimidazolium bis(oxalato)borate ionic liquids and the influence of anion structural characteristics on thermodynamic properties
研究领域[WOS]: Chemistry ;  Physics
英文摘要: Two chelated orthoborate ionic liquids (ILs), 1-butyl-3-methylimidazolium bis(oxalato)borate ([Bmim][BOB]) and 1-hexyl-3-methylimidazolium bis(oxalato)borate ([Hmim][BOB]), were prepared and characterized. Their thermodynamic properties were studied using adiabatic calorimetry and differential scanning calorimetry (DSC). The thermodynamic properties of the two ILs were evaluated and compared with each other, and then with those of other [Bmim] type ILs. The results clearly indicate that for a given cation (or anion) and at a certain temperature, the more atoms in the anion (or cation), the higher the heat capacity; the higher glass-transition temperatures of [BOB] type ILs than others are mainly caused by the higher symmetry of the orthoborate anion structure. It is suggested that a high content of strong electronegative atoms and C(n) or C(nv) (n = 1,2,3,..., infinity) point group symmetry in the anion are favorable for the design and synthesis of room temperature ILs with a wide liquid range.
关键词[WOS]: THERMOPHYSICAL PROPERTIES ;  BIS(TRIFLUOROMETHYLSULFONYL)IMIDE ;  1-ETHYL-3-METHYLIMIDAZOLIUM ;  CALORIMETER ;  ENTHALPY ;  EMIES
语种: 英语
WOS记录号: WOS:000285099800023
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115171
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, China Ion Liquid Lab, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Thermochem Lab, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Yang, Miao,Zhao, Jun-Ning,Liu, Qing-Shan,et al. Low-temperature heat capacities of 1-alkyl-3-methylimidazolium bis(oxalato)borate ionic liquids and the influence of anion structural characteristics on thermodynamic properties[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2011,13(1):199-206.
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