Ionic liquids containing the urea moiety for recognition of halides and complex anions

Zhi Yun Dong; Yu Yang; Li Feng Zhang; Yun Rong Xue; Mei Yun Feng; Guo Hua Gao

doi:10.1007/s11434-011-4722-6

Ionic liquids containing the urea moiety for recognition of halides and complex anions

Zhi Yun Dong
, Yu Yang
, Li Feng Zhang
, Yun Rong Xue
, Mei Yun Feng
, Guo Hua Gao

School of Chemistry and Molecular Engineering

East China Normal University

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

A series of novel imidazolium based ionic liquids containing the urea moiety were designed and synthesized for anion recognition. 1-Ethylurea-3-methylimidazolium acetate ([Eumim]OAc) was used as the receptor for the halides and complex anions (BF ₄ ^-, PF ₆ ^-, BPh ₄ ^-). ¹H NMR spectra showed that the urea protons and imidazolium C(2) proton of the receptor ([Eumim]OAc) moved upfield on addition of various anions. A Job plot showed that the [Eumim]OAc receptor formed a 1:1 complex with BPh ₄ ^-. X-ray diffraction analysis and the molecular modeling study revealed that the conformations of [Eumim]OAc and [Eumim]BPh ⁴ were different. The conformational change of the cation was caused by anion exchange, and may provide an alternative to current methods for recognition of anions.

Original language	English
Pages (from-to)	473-478
Number of pages	6
Journal	Chinese Science Bulletin
Volume	57
Issue number	5
DOIs	https://doi.org/10.1007/s11434-011-4722-6
State	Published - Feb 2012

Keywords

anion exchange
anion recognition
complex anions
conformation
ionic liquids

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10.1007/s11434-011-4722-6

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@article{b32fbab272454d678c6759cf1ab294cd,

title = "Ionic liquids containing the urea moiety for recognition of halides and complex anions",

abstract = "A series of novel imidazolium based ionic liquids containing the urea moiety were designed and synthesized for anion recognition. 1-Ethylurea-3-methylimidazolium acetate ([Eumim]OAc) was used as the receptor for the halides and complex anions (BF 4 -, PF 6 -, BPh 4 -). 1H NMR spectra showed that the urea protons and imidazolium C(2) proton of the receptor ([Eumim]OAc) moved upfield on addition of various anions. A Job plot showed that the [Eumim]OAc receptor formed a 1:1 complex with BPh 4 -. X-ray diffraction analysis and the molecular modeling study revealed that the conformations of [Eumim]OAc and [Eumim]BPh 4 were different. The conformational change of the cation was caused by anion exchange, and may provide an alternative to current methods for recognition of anions.",

keywords = "anion exchange, anion recognition, complex anions, conformation, ionic liquids",

author = "Dong, \{Zhi Yun\} and Yu Yang and Zhang, \{Li Feng\} and Xue, \{Yun Rong\} and Feng, \{Mei Yun\} and Gao, \{Guo Hua\}",

year = "2012",

month = feb,

doi = "10.1007/s11434-011-4722-6",

language = "英语",

volume = "57",

pages = "473--478",

journal = "Chinese Science Bulletin",

issn = "1001-6538",

publisher = "Elsevier B.V.",

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}

TY - JOUR

T1 - Ionic liquids containing the urea moiety for recognition of halides and complex anions

AU - Dong, Zhi Yun

AU - Yang, Yu

AU - Zhang, Li Feng

AU - Xue, Yun Rong

AU - Feng, Mei Yun

AU - Gao, Guo Hua

PY - 2012/2

Y1 - 2012/2

N2 - A series of novel imidazolium based ionic liquids containing the urea moiety were designed and synthesized for anion recognition. 1-Ethylurea-3-methylimidazolium acetate ([Eumim]OAc) was used as the receptor for the halides and complex anions (BF 4 -, PF 6 -, BPh 4 -). 1H NMR spectra showed that the urea protons and imidazolium C(2) proton of the receptor ([Eumim]OAc) moved upfield on addition of various anions. A Job plot showed that the [Eumim]OAc receptor formed a 1:1 complex with BPh 4 -. X-ray diffraction analysis and the molecular modeling study revealed that the conformations of [Eumim]OAc and [Eumim]BPh 4 were different. The conformational change of the cation was caused by anion exchange, and may provide an alternative to current methods for recognition of anions.

AB - A series of novel imidazolium based ionic liquids containing the urea moiety were designed and synthesized for anion recognition. 1-Ethylurea-3-methylimidazolium acetate ([Eumim]OAc) was used as the receptor for the halides and complex anions (BF 4 -, PF 6 -, BPh 4 -). 1H NMR spectra showed that the urea protons and imidazolium C(2) proton of the receptor ([Eumim]OAc) moved upfield on addition of various anions. A Job plot showed that the [Eumim]OAc receptor formed a 1:1 complex with BPh 4 -. X-ray diffraction analysis and the molecular modeling study revealed that the conformations of [Eumim]OAc and [Eumim]BPh 4 were different. The conformational change of the cation was caused by anion exchange, and may provide an alternative to current methods for recognition of anions.

KW - anion exchange

KW - anion recognition

KW - complex anions

KW - conformation

KW - ionic liquids

UR - https://www.scopus.com/pages/publications/84862927684

U2 - 10.1007/s11434-011-4722-6

DO - 10.1007/s11434-011-4722-6

M3 - 文章

AN - SCOPUS:84862927684

SN - 1001-6538

VL - 57

SP - 473

EP - 478

JO - Chinese Science Bulletin

JF - Chinese Science Bulletin

IS - 5

ER -

Ionic liquids containing the urea moiety for recognition of halides and complex anions

Abstract

Keywords

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