Are deep eutectic solvents (DESs) a promising alternative to conventional solvents? Perhaps, but their development is hindered by a plethora of misconceptions. These are carefully analyzed here, beginning with the very meaning of DESs, which has strayed far beyond its original scope of eutectic mixtures of Lewis or Brønsted acids and bases. Instead, a definition that is grounded on thermodynamic principles and distinguishes between eutectic and deep eutectic is encouraged, and the types of precursors that can be used to prepare DESs are reviewed. Landmark works surrounding the sustainability, stability, toxicity, and biodegradability of these solvents are also discussed, revealing piling evidence that numerous DESs reported thus far, particularly those that are choline based, lack sufficient sustainability-related traits to be considered green solvents. Finally, emerging DES applications are reviewed, emphasizing their most remarkable feature: the ability to liquefy a solid compound with a target property, allowing its use as a liquid solvent.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1146/annurev-chembioeng-101121-085323 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The swelling-induced fractionation strategy to mediate cellulose availability and lignin structural integrity.
Chem Commun (Camb)
January 2025
College of Environment Science, Sichuan Agricultural University, Chengdu, Sichuan 611130, P. R. China.
We report a facile fractionation strategy using choline hydroxide (ChOH) based alkaline deep eutectic solvents (DES) for whole-component upgrading of bagasse. Through selective lignin and xylan dissolution, along with extensive biomass swelling, high-value lignin-carbohydrate complexes (LCC, with high β-O-4 bond content of 68.9/100 Ar) and high-purity xylan were extracted without compromising cellulose recovery and hydrolysis.
View Article and Find Full Text PDFTemperature Dependence of Intermolecular Dynamics and Liquid Properties of Deep Eutectic Solvent, Reline.
J Phys Chem B
January 2025
Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, J. D. Block, Sec.III, Salt Lake, Kolkata, West Bengal 700 098, India.
We investigated the temperature dependence of the intermolecular dynamics, including intermolecular vibrations and collective orientational relaxation, of one of the most typical deep eutectic solvents, reline, using femtosecond Raman-induced Kerr effect spectroscopy (fs-RIKES), subpicosecond optical Kerr effect spectroscopy (ps-OKES), and molecular dynamics (MD) simulations. According to fs-RIKES results, the temperature-dependent intermolecular vibrational band peak at ∼90 cm exhibited a redshift with increasing temperature. The density-of-state (DOS) spectrum of reline by MD simulations reproduced this fs-RIKES spectral feature.
View Article and Find Full Text PDFSample preparation using deep eutectic solvents in combination with nanomaterials in analytical procedures: A review.
Anal Chim Acta
February 2025
School of Pharmacy, Sungkyunkwan University, Suwon, Gyeonggi-do, 16419, Republic of Korea. Electronic address:
Background: Sample preparation can be a critical stage of analytical procedures that profoundly influences their performance, environmental impact, and overall efficiency. While nanomaterials have revolutionized sample preparation owing to their high surface area-to-volume ratios, tunable surface chemistry, and enhanced adsorption capacities, limitations persist. Researchers have ushered in a new era of efficient sample preparation methodologies that could overcome the limitations of nanomaterials by introducing deep eutectic solvents (DESs), which have unique advantages such as low volatility and toxicity, biodegradability, and tunability.
View Article and Find Full Text PDFAdvances and challenges in green extraction of chitin for food and agriculture applications: A review.
Int J Biol Macromol
January 2025
Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, United States. Electronic address:
Chitin, the second most abundant polysaccharide in nature, offers numerous practical applications due to its versatile functional properties. However, its utilization is constrained by significant challenges in extraction, as well as low solubility and high crystallinity. While traditional chemical and biological fermentation methods can achieve high-purity chitin, these processes are often environmentally harmful or time/energy-consuming.
View Article and Find Full Text PDFCaCO-coated indoxacarb deep eutectic solvent complexed with diatomaceous earth improves insecticidal activity against the red imported fire ants.
Ecotoxicol Environ Saf
January 2025
School of Tropical Agriculture and Forestry, Hainan University, Danzhou, Hainan 570228, China. Electronic address:
The red imported fire ants (RIFAs) are a globally important invasive pest that severely affects the ecosystem and human health, and its current control is primarily through chemical pesticides. However, the extensive use of chemical pesticides causes environmental problems, and alternative strategies for controlling this pest are being explored. In our study, we aimed to design a deep eutectic solvent (DES)-CaCO system in which RIFAs were used as target insects to increase the lethal activity and behavioural regulation effects on RIFAs via contact and feeding.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!