| 词条 | Natural deep eutectic solvents |
| 释义 |
Natural deep eutectic solvents (NADES) are bio-based ionic liquids and deep eutectic solvents which are composed of two or more compounds that are generally plant based primary metabolites, i.e. organic acids, sugars, alcohols, amines and amino acids.[1][2] Ionic liquids are salts, liquid at room temperature, characterized by ionic bonds which have at least one large organic ion and a cation with a low degree of symmetry. The positive and negatively charged ions in the liquid are thus kept far apart so that they reduce the attractive forces between them and hinder crystallization, lowering the melting point and resulting in a completely ionic liquid at room temperature.[3] Deep eutectic solvents (DES) are mixtures of solid compounds that form liquids due to a large depression of the melting point; the charge delocalization in the case of DES is caused by hydrogen bonding forming a non-aqueous liquid at room temperature.[4][5] Work done by Choi, Spronsen et al.[1] showed that water can be present as part of the solvent, being strongly retained in the liquid and which cannot be evaporated. References1. ^1 {{Cite journal|author1=Choi, Young Hae |author2=van Spronsen, Jaap |author3=Yuntao, Dai |author4=Verberne, Marianne |author5=Hollmann, Frank |author6=Arends, Isabel W.C.E. |author-link6=Isabel Arends |author7=Witkamp, Geert-Jan |author8=Verpoorte, Rob | year = 2011| title = Are Natural Deep Eutectic Solvents the Missing Link in Understanding Cellular Metabolism and Physiology| journal = Plant Physiology | pages = 1701–1705| doi = 10.1104/pp.111.178426| volume=156 |issue=4 | pmid=21677097 | pmc=3149944}} {{Chemistry-stub}}2. ^{{Cite journal|author1=Dai, Yuntao |author2=van Spronsen, Jaap |author3=Witkamp, Geert-Jan |author4=Verpoorte, Rob |author5=Choi, Young Hae | year = 2013| title = Natural deep eutectic solvents as new potential media for green technology| journal = Analytica Chimica Acta | volume = 766| pages = 61–68|doi=10.1016/j.aca.2012.12.019 | pmid = 23427801}} 3. ^{{Cite journal|author1=Earle, Martyn J. |author2=Seddon, Kenneth R. | year = 2000| title = Ionic liquids. Green solvents for the future| journal = Pure and Applied Chemistry |volume=72 |issue=7 | pages = 1391–1398 | doi=10.1351/pac200072071391}} 4. ^{{Cite journal|author1=Abbott, Andrew P. |author2=Boothby, David |author3=Capper, Glen |author4=Davies, David L. |author5=Rasheed, Raymond K. | year = 2004| title = Deep Eutectic Solvents Formed between Choline Chloride and Carboxylic acids: Versatile Alternatives to Ionic Liquids| journal = Journal of the American Chemical Society |volume=126 |issue=29 | pages = 9142–9147|doi=10.1021/ja048266j }} 5. ^{{Cite journal|author1=Dai, Yuntao |author2=van Spronsen, Jaap |author3=Witkamp, Geert-Jan |author4=Verpoorte, Robert |author5=Choi, Young Hae | year = 2013| title = Ionic Liquids and Deep Eutectic Solvents in Natural Products Research: Mixtures of Solids as Extraction Solvents| journal = Journal of Natural Products | volume = 76| issue = 11| pages = 2162–2173|doi=10.1021/np400051w | pmid = 24188074|pmc=3841005}} 1 : Chemical classification |
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