Revisiting greenness of ionic liquids and deep eutectic solvents

Green solvents are one of the hot topics of green chemistry. Ionic liquids (ILs) and deep eutectic solvents (DESs) are deemed as green solvents to a certain extent, and they have been applied in many areas, such as dissolution, separation, catalysis, electrochemistry and material synthesis. However,...

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Main Authors: Yu Chen, Tiancheng Mu
Format: Article
Language:English
Published: KeAi Communications Co. Ltd. 2021-06-01
Series:Green Chemical Engineering
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2666952821000121
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author Yu Chen
Tiancheng Mu
author_facet Yu Chen
Tiancheng Mu
author_sort Yu Chen
collection DOAJ
description Green solvents are one of the hot topics of green chemistry. Ionic liquids (ILs) and deep eutectic solvents (DESs) are deemed as green solvents to a certain extent, and they have been applied in many areas, such as dissolution, separation, catalysis, electrochemistry and material synthesis. However, the greenness of ILs and DESs should be revisited because more and more evidences have shown that they are not always green. In this perspective, besides the reported merits, the disadvantages and problems of some ILs and DESs, such as instability, volatility, hygroscopicity, toxicity, flammability, regenerability, cost, energy consumption and impurities are discussed. Moreover, 13 strategies to avoid the disadvantages of ILs and DESs and to increase the greenness are proposed. Comparison of the greenness of ILs and DESs is further conducted. This perspective provides some new viewpoints on the greenness of ILs and DESs.
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spelling doaj.art-e75bb6fa16a345699eff4622c12cc5c32022-12-27T04:39:47ZengKeAi Communications Co. Ltd.Green Chemical Engineering2666-95282021-06-0122174186Revisiting greenness of ionic liquids and deep eutectic solventsYu Chen0Tiancheng Mu1Department of Chemistry and Material Science, Langfang Normal University, NO. 100 Aimin West Road, Anci District, Langfang, 065000, Hebei, China; Corresponding authors.Department of Chemistry, Renmin University of China, NO. 59 Zhongguancun Street, Haidian District, Beijing, 100872, China; Corresponding authors.Green solvents are one of the hot topics of green chemistry. Ionic liquids (ILs) and deep eutectic solvents (DESs) are deemed as green solvents to a certain extent, and they have been applied in many areas, such as dissolution, separation, catalysis, electrochemistry and material synthesis. However, the greenness of ILs and DESs should be revisited because more and more evidences have shown that they are not always green. In this perspective, besides the reported merits, the disadvantages and problems of some ILs and DESs, such as instability, volatility, hygroscopicity, toxicity, flammability, regenerability, cost, energy consumption and impurities are discussed. Moreover, 13 strategies to avoid the disadvantages of ILs and DESs and to increase the greenness are proposed. Comparison of the greenness of ILs and DESs is further conducted. This perspective provides some new viewpoints on the greenness of ILs and DESs.http://www.sciencedirect.com/science/article/pii/S2666952821000121Green solventsIonic liquidsDeep eutectic solventsGreennessStability
spellingShingle Yu Chen
Tiancheng Mu
Revisiting greenness of ionic liquids and deep eutectic solvents
Green Chemical Engineering
Green solvents
Ionic liquids
Deep eutectic solvents
Greenness
Stability
title Revisiting greenness of ionic liquids and deep eutectic solvents
title_full Revisiting greenness of ionic liquids and deep eutectic solvents
title_fullStr Revisiting greenness of ionic liquids and deep eutectic solvents
title_full_unstemmed Revisiting greenness of ionic liquids and deep eutectic solvents
title_short Revisiting greenness of ionic liquids and deep eutectic solvents
title_sort revisiting greenness of ionic liquids and deep eutectic solvents
topic Green solvents
Ionic liquids
Deep eutectic solvents
Greenness
Stability
url http://www.sciencedirect.com/science/article/pii/S2666952821000121
work_keys_str_mv AT yuchen revisitinggreennessofionicliquidsanddeepeutecticsolvents
AT tianchengmu revisitinggreennessofionicliquidsanddeepeutecticsolvents