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Reversible Hydrophobic-Hydrophilic Transition of Ionic Liquids Driven by Carbon Dioxide

Ionic liquids (ILs) with a reversible hydrophobic-hydrophilic transition were developed, and they exhibited unique phase behavior with H2O: monophase in the presence of CO2, but biphase upon removal of CO2 at room temperature and atmospheric pressure. Thus, coupling of reaction, separation, and reco... Full description

Journal Title: Angewandte Chemie Jun 15, 2015, Vol.54(25), pp.7265-7269
Main Author: Xiong, Dazhen
Other Authors: Cui, Guokai , Wang, Jianji , Wang, Huiyong , Li, Zhiyong , Yao, Kaisheng , Zhang, Suojiang
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 14337851 ; E-ISSN: 15213773 ; DOI: 10.1002/anie.201500695
Link: http://search.proquest.com/docview/1689826394/?pq-origsite=primo
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title: Reversible Hydrophobic-Hydrophilic Transition of Ionic Liquids Driven by Carbon Dioxide
format: Article
creator:
  • Xiong, Dazhen
  • Cui, Guokai
  • Wang, Jianji
  • Wang, Huiyong
  • Li, Zhiyong
  • Yao, Kaisheng
  • Zhang, Suojiang
subjects:
  • Ions
  • Carbon Dioxide
  • Liquids
ispartof: Angewandte Chemie, Jun 15, 2015, Vol.54(25), pp.7265-7269
description: Ionic liquids (ILs) with a reversible hydrophobic-hydrophilic transition were developed, and they exhibited unique phase behavior with H2O: monophase in the presence of CO2, but biphase upon removal of CO2 at room temperature and atmospheric pressure. Thus, coupling of reaction, separation, and recovery steps in sustainable chemical processes could be realized by a reversible liquid-liquid phase transition of such IL-H2O mixtures. Spectroscopic investigations and DFT calculations showed that the mechanism behind hydrophobic-hydrophilic transition involved reversible reaction of CO2 with anion of the ILs and formation of hydrophilic ammonium salts. These unique IL-H2O systems were successfully utilized for facile one-step synthesis of Au porous films by bubbling CO2 under ambient conditions. The Au porous films and the ILs were then separated simultaneously from aqueous solutions by bubbling N2, and recovered ILs could be directly reused in the next process.
language: eng
source:
identifier: ISSN: 14337851 ; E-ISSN: 15213773 ; DOI: 10.1002/anie.201500695
fulltext: fulltext
issn:
  • 14337851
  • 1433-7851
  • 15213773
  • 1521-3773
url: Link


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titleReversible Hydrophobic-Hydrophilic Transition of Ionic Liquids Driven by Carbon Dioxide
creatorXiong, Dazhen ; Cui, Guokai ; Wang, Jianji ; Wang, Huiyong ; Li, Zhiyong ; Yao, Kaisheng ; Zhang, Suojiang
ispartofAngewandte Chemie, Jun 15, 2015, Vol.54(25), pp.7265-7269
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descriptionIonic liquids (ILs) with a reversible hydrophobic-hydrophilic transition were developed, and they exhibited unique phase behavior with H2O: monophase in the presence of CO2, but biphase upon removal of CO2 at room temperature and atmospheric pressure. Thus, coupling of reaction, separation, and recovery steps in sustainable chemical processes could be realized by a reversible liquid-liquid phase transition of such IL-H2O mixtures. Spectroscopic investigations and DFT calculations showed that the mechanism behind hydrophobic-hydrophilic transition involved reversible reaction of CO2 with anion of the ILs and formation of hydrophilic ammonium salts. These unique IL-H2O systems were successfully utilized for facile one-step synthesis of Au porous films by bubbling CO2 under ambient conditions. The Au porous films and the ILs were then separated simultaneously from aqueous solutions by bubbling N2, and recovered ILs could be directly reused in the next process.
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titleReversible Hydrophobic-Hydrophilic Transition of Ionic Liquids Driven by Carbon Dioxide
descriptionIonic liquids (ILs) with a reversible hydrophobic-hydrophilic transition were developed, and they exhibited unique phase behavior with H2O: monophase in the presence of CO2, but biphase upon removal of CO2 at room temperature and atmospheric pressure. Thus, coupling of reaction, separation, and recovery steps in sustainable chemical processes could be realized by a reversible liquid-liquid phase transition of such IL-H2O mixtures. Spectroscopic investigations and DFT calculations showed that the mechanism behind hydrophobic-hydrophilic transition involved reversible reaction of CO2 with anion of the ILs and formation of hydrophilic ammonium salts. These unique IL-H2O systems were successfully utilized for facile one-step synthesis of Au porous films by bubbling CO2 under ambient conditions. The Au porous films and the ILs were then separated simultaneously from aqueous solutions by bubbling N2, and recovered ILs could be directly reused in the next process.
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titleReversible Hydrophobic-Hydrophilic Transition of Ionic Liquids Driven by Carbon Dioxide
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abstractIonic liquids (ILs) with a reversible hydrophobic-hydrophilic transition were developed, and they exhibited unique phase behavior with H2O: monophase in the presence of CO2, but biphase upon removal of CO2 at room temperature and atmospheric pressure. Thus, coupling of reaction, separation, and recovery steps in sustainable chemical processes could be realized by a reversible liquid-liquid phase transition of such IL-H2O mixtures. Spectroscopic investigations and DFT calculations showed that the mechanism behind hydrophobic-hydrophilic transition involved reversible reaction of CO2 with anion of the ILs and formation of hydrophilic ammonium salts. These unique IL-H2O systems were successfully utilized for facile one-step synthesis of Au porous films by bubbling CO2 under ambient conditions. The Au porous films and the ILs were then separated simultaneously from aqueous solutions by bubbling N2, and recovered ILs could be directly reused in the next process.
copWeinheim
pubWiley Subscription Services, Inc.
doi10.1002/anie.201500695
urlhttp://search.proquest.com/docview/1689826394/
date2015-06-15