Production of lignin-containing nanocellulose from poplar using ternary deep eutectic solvents pretreatment

<div><div><div><p>The structural features of a series of diverse Deep Eutectic Solvents (DESs) have been investigated and characterized by means of two fluorescent probes. The spectral and photophysical properties of the latter are strictly dependent on the experienced environment, so that they can provide insights into the polarity, viscosity, hydrogen-bond network, and micro-heterogeneity of the various DESs.</p><p>In fact, the investigated DESs exhibit a variety of properties with regards to their hydrophilicity, acidity, and hydrogen-bond ability, and these details were deeply probed by the two fluorescent molecules. The effect of the addition of water, which is a key strategy for tuning the properties of these structured systems, was also tested. In particular, the excited state dynamics of the probes, measured by femtosecond-resolved transient absorption, proved instrumental in understanding the changes in the structural properties of the DESs, namely reduced viscosity and enhanced heterogeneity, as the water percentage increases. Differences between the various DESs in terms of both local microheterogeneity and bulk viscosity also emerged from the peculiar multi-exponential solvation dynamics undergone by the excited states of the probes.</p></div></div></div>

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Probing the Structural Features and the Micro-heterogeneity of Various Deep Eutectic Solvents and their Water Dilutions by the Photophysical Behaviour of Two Fluorophores

10.26434/chemrxiv.13395683 ◽

2020 ◽

Author(s):

Matteo Tiecco ◽

Irene Di Guida ◽

Pier Luigi Gentili ◽

Raimondo Germani ◽

Carmela Bonaccorso ◽

...

Keyword(s):

Hydrogen Bond ◽

Transient Absorption ◽

Photophysical Properties ◽

Deep Eutectic Solvents ◽

Structural Features ◽

Solvation Dynamics ◽

Structured Systems ◽

Reduced Viscosity ◽

Bond Network ◽

Fluorescent Molecules

<div><div><div><p>The structural features of a series of diverse Deep Eutectic Solvents (DESs) have been investigated and characterized by means of two fluorescent probes. The spectral and photophysical properties of the latter are strictly dependent on the experienced environment, so that they can provide insights into the polarity, viscosity, hydrogen-bond network, and micro-heterogeneity of the various DESs.</p><p>In fact, the investigated DESs exhibit a variety of properties with regards to their hydrophilicity, acidity, and hydrogen-bond ability, and these details were deeply probed by the two fluorescent molecules. The effect of the addition of water, which is a key strategy for tuning the properties of these structured systems, was also tested. In particular, the excited state dynamics of the probes, measured by femtosecond-resolved transient absorption, proved instrumental in understanding the changes in the structural properties of the DESs, namely reduced viscosity and enhanced heterogeneity, as the water percentage increases. Differences between the various DESs in terms of both local microheterogeneity and bulk viscosity also emerged from the peculiar multi-exponential solvation dynamics undergone by the excited states of the probes.</p></div></div></div>

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Study of dynamics and nanosegregation in ionic liquids and deep eutectic solvents by fluorescence correlation spectroscopy

10.31274/etd-20200624-189 ◽

2020 ◽

Author(s):

Deyny Leticia Mendivelso-P?rez

Keyword(s):

Ionic Liquids ◽

Fluorescence Correlation Spectroscopy ◽

Deep Eutectic Solvents ◽

Correlation Spectroscopy ◽

Fluorescence Correlation

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Faculty Opinions recommendation of Are natural deep eutectic solvents the missing link in understanding cellular metabolism and physiology?

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.13132964.14460065 ◽

2011 ◽

Author(s):

Wendy Boss

Keyword(s):

Cellular Metabolism ◽

Deep Eutectic Solvents ◽

Missing Link ◽

Natural Deep Eutectic Solvents

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Synthesis of Vanadium Phosphorus Oxide Catalysts Assisted by Deep-Eutectic Solvents for n-Butane Selective Oxidation

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.8b06010 ◽

2019 ◽

Vol 58 (8) ◽

pp. 2857-2867 ◽

Cited By ~ 6

Author(s):

Bin He ◽

Zihang Li ◽

Huiling Zhang ◽

Fei Dai ◽

Kang Li ◽

...

Keyword(s):

Selective Oxidation ◽

Deep Eutectic Solvents ◽

Oxide Catalysts ◽

Phosphorus Oxide ◽

Vanadium Phosphorus Oxide

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Environmentally Friendly Techniques and Their Comparison in the Extraction of Natural Antioxidants from Green Tea, Rosemary, Clove, and Oregano

Molecules ◽

10.3390/molecules26071869 ◽

2021 ◽

Vol 26 (7) ◽

pp. 1869

Author(s):

Mariel Calderón-Oliver ◽

Edith Ponce-Alquicira

Keyword(s):

Green Tea ◽

Electric Fields ◽

Antioxidant Activities ◽

Environmentally Friendly ◽

Natural Antioxidants ◽

Deep Eutectic Solvents ◽

Extraction Methods ◽

Extraction Techniques ◽

Health Trends ◽

Food Applications

Many current food and health trends demand the use of more ecological, sustainable, and environmentally friendly techniques for the extraction of bioactive compounds, including antioxidants. However, extraction yields and final antioxidant activities vary between sources and are highly influenced by the given extraction method and nature and ratio of the employed solvent, especially for total polyphenols, flavonoids, and anthocyanins, which are well recognized as natural antioxidants with food applications. This review focused on the most common extraction techniques and potential antioxidant activity in the food industry for various natural antioxidant sources, such as green tea, rosemary, clove, and oregano. Green extraction techniques have been proven to be far more efficient, environmentally friendly, and economical. In general, these techniques include the use of microwaves, ultrasound, high hydrostatic pressure, pulsed electric fields, enzymes, and deep eutectic solvents, among others. These extraction methods are described here, including their advantages, disadvantages, and applications.

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