NMR methodology for a rational selection of ionic liquids: extracting polyphenols

Barrulas, Raquel V.; Paiva, Tiago G.; Corvo, Marta C.

doi:10.1016/j.seppur.2019.03.077

Cited by 9 publications

(3 citation statements)

References 42 publications

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“…Barrulas et al gave an important contribution for the NMR study of interactions between ILs and small molecules [20]. The articles so far were not very complete in terms of the NMR experiments available, lacking always some proof of concept.…”

Section: Polyphenols (Catechins)mentioning

confidence: 99%

“…The best ILs for extracting matcha polyphenols were imidazolium derivatives with shorter alkyl sidechains and weakly basic anions such as [TCM] − , [DCA] − , and [OTf ] − . Finally, it was possible to locate π-π stacking and hydrophobic interactions in case of the cation and H-bond acceptor interactions in case of the anion [20]. Molecular Interactions in Ionic Liquids: The NMR Contribution towards Tailored Solvents DOI: http://dx.doi.org/10.5772/intechopen.89182…”

Section: Polyphenols (Catechins)mentioning

confidence: 99%

“…Figure 3. 2D 1 H, 1 H-NOESY spectrum with 200 ms mixing time of [C 4 C 1 Im]Cl/naphthalene mixture [0.16:0.16 (M/M) in DMSO-d 6 ] and main intermolecular interactions (adapted from Ref [20]…”

mentioning

confidence: 99%

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Molecular Interactions in Ionic Liquids: The NMR Contribution towards Tailored Solvents

Lopes¹,

Barrulas

Paiva

et al. 2020

Nuclear Magnetic Resonance

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Ionic liquids have been on the spotlight of chemical research field in the last decades. Their physical properties (low vapor pressure, thermal stability, and conductivity) and the possibility of fine tuning make them a versatile class of compounds for a wide range of applications, such as catalysis, energy, and material sciences. Ionic liquids can establish multiple intermolecular interactions with solutes such as electrostatic, van der Waals, or hydrogen bonds. The prospect of designing ionic liquid structures toward specific applications has attracted the attention to these alternative solvents. However, their rational design demands a molecular detailed view, and Nuclear Magnetic Resonance is a unique and privileged technique for this purpose, as it provides atomic resolution and at the same time enables the study of dynamic information. In this chapter, we provide an overview about the application of Nuclear Magnetic Resonance spectroscopy techniques as a methodology for the rational design of ionic liquids as solvents for small organic compounds, CO 2 capture, and polymers such as cellulose focusing mainly in the last 10 years.

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Section: Polyphenols (Catechins)mentioning

confidence: 99%

Section: Polyphenols (Catechins)mentioning

confidence: 99%

See 1 more Smart Citation

Molecular Interactions in Ionic Liquids: The NMR Contribution towards Tailored Solvents

Lopes¹,

Barrulas

Paiva

et al. 2020

Nuclear Magnetic Resonance

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Porous Ionic Liquid Derived Materials for CO2 Emissions Mitigation

Barrulas

Zanatta

Corvo

2021

Advanced Functional Porous Materials

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Terminalia catappa leaf extract as a bio-reducing agent to synthesize Cu2O nanoparticles for methylene blue photodegradation

Nguyen,

Nguyen

et al. 2024

Discov Appl Sci

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The large tree species Terminalia catappa is a member of the Combretaceae family and is mainly found in tropical climates. They are commonly cultivated for shade because they have huge, dense foliage. Numerous polyphenols, including flavonoids, tannins, saponins, and phytosterols, are present in the leaves. In this study, the green chemical method was used to extract polyphenols from dried green almond leaves. They were employed in the synthesis of Cu2O nanoparticles as a reducing agent. FTIR and UV–Vis were used to describe the leaf extract of Terminalia catappa after the chlorophyll was removed. Copper salt was used to create Cu2O nanoparticles via a reduction process. The extract's potential for photocatalytic dye degradation has also been explored. The obtained Cu2O had a spherical shape with dimensions of 50–100 nm, and its band gap energy reached 1.945 eV to remove methylene blue from aqueous media under visible light irradiation conditions. At an initial MB concentration of 10 ppm, the decomposition efficiency reached 71.99% after only 2 h of exposure to simulated sunlight. The decomposition process occurred according to a pseudo-first-order kinetic model with a rate constant of 0.0084 min−1.

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NMR methodology for a rational selection of ionic liquids: extracting polyphenols

Cited by 9 publications

References 42 publications

Molecular Interactions in Ionic Liquids: The NMR Contribution towards Tailored Solvents

Molecular Interactions in Ionic Liquids: The NMR Contribution towards Tailored Solvents

Porous Ionic Liquid Derived Materials for CO2 Emissions Mitigation

Terminalia catappa leaf extract as a bio-reducing agent to synthesize Cu2O nanoparticles for methylene blue photodegradation

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