Molecular interaction forces in acetone + ethanol binary liquid solutions: FTIR and theoretical studies

Jadhav, Deepali L.; Karthick, N.; Kannan, P.; Shanmugam, Ramasamy; Elangovan, A.; Arivazhagan, G.

doi:10.1016/j.molstruc.2016.10.055

Cited by 41 publications

(10 citation statements)

References 29 publications

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“…Thus, the chalcogenide waveguide sensor was able to differentiate ethanol and acetone vapor by their distinct mid-IR C–H absorption. This result agreed with previous Fourier transform infrared spectroscopy measurements showing that the C–H absorption band from acetone was narrower in the mid-IR regime compared to ethanol. , …”

Section: Resultssupporting

confidence: 93%

“…This result agreed with previous Fourier transform infrared spectroscopy measurements showing that the C−H absorption band from acetone was narrower in the mid-IR regime compared to ethanol. 37,38 To characterize the real-time sensing performance, the analyte was prepared by mixing the diluting gas N 2 (99.999%) with the ethanol vapor at different gas flow rates. Meanwhile, the laser wavelength was adjusted to the ethanol C−H absorption band at 3.46 μm to continuously trace the ethanol concentration.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Mid-Infrared Chalcogenide Waveguides for Real-Time and Nondestructive Volatile Organic Compound Detection

et al. 2018

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A mid-infrared (mid-IR) sensor chip was demonstrated for volatile organic compound (VOC) detection. The sensor consisted of As2Se3 optical waveguides built by microelectronic fabrication processes. The VOC sensing performance was characterized by measuring acetone and ethanol vapors at their characteristic C–H absorption from λ = 3.40 to 3.50 μm. Continuous VOC detection with <5 s response time was achieved by measuring the intensity attenuation of the waveguide mode. The miniaturized noninvasive VOC sensor can be applied to breath analysis and environmental toxin monitoring.

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Section: Resultssupporting

confidence: 93%

Section: ■ Results and Discussionmentioning

confidence: 99%

Mid-Infrared Chalcogenide Waveguides for Real-Time and Nondestructive Volatile Organic Compound Detection

et al. 2018

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“…7 More importantly, NH stretching gas-to-matrix shifts are rationalised and incrementally reproduced by stepwise nitrogen complexation in neon and argon matrices as well as supersonic expansions. All spectra as well as harmonic density functional theory predictions show a weak, but distinct downshift of the NH stretching vibration upon hydrogen bond formation, clearly correcting a proposed unusual upshift based on anharmonic calculations and nitrogen matrix spectra 23 which has received considerable attention 22,[28][29][30] despite being challenged by more reliable calculations. 19…”

Section: Introductionsupporting

confidence: 65%

Incremental NH stretching downshift through stepwise nitrogen complexation of pyrrole: a combined jet expansion and matrix isolation study

Oswald

Suhm

Coussan

2019

Phys. Chem. Chem. Phys.

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“…They include hydrogen bonding between ethanol or acetone molecules, hydrogen bonding between ethanol and acetone molecules and dipole-dipole interactions between acetone molecules. From the association of ethanol molecules, dimers, and cyclic multimers (especially trimers and tetramers) can be formed [49]. At concentrations below 55 mol%, acetone tends to self-associate rather than form hydrogen bonds with ethanol, while self-association of ethanol molecules is more favorable at ethanol concentrations below 50 mol% [47].…”

Section: Solvent Effects On Lycopene Extractionmentioning

confidence: 99%

Enhanced Lycopene Extraction from Tomato Peels by Optimized Mixed-Polarity Solvent Mixtures

Zuorro

2020

Molecules

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Mounting evidence from clinical and epidemiological studies suggests that lycopene, the most abundant carotenoid in tomatoes, may be beneficial in the prevention or treatment of some important diseases. Ripe tomato peels are the richest source of lycopene, but the use of conventional solvent extraction methods without pretreatment of the plant material results in very poor recovery. The reason lies in the localization of lycopene in the plant tissue and the low permeability of the latter to solvent molecules. In this paper, a mixture design procedure was used to formulate solvent mixtures allowing the recovery of lycopene from non-pretreated tomato peels. Two ternary systems were investigated: (a) n-hexane–ethanol–acetone and (b) ethyl lactate–ethanol–acetone. Optimization of the ternary mixture composition led to a recovery of over 90% of the lycopene present in the peels. The high extraction efficiency was explained in terms of lycopene affinity combined with the ability to swell the plant material. A tomato oleoresin with high antioxidant activity and a lycopene content of about 13% (w/w) was also produced. Overall, the results indicate that highly effective solvents for direct recovery of lycopene from tomato peels can be easily prepared by a mixture design approach.

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Molecular interaction forces in acetone + ethanol binary liquid solutions: FTIR and theoretical studies

Cited by 41 publications

References 29 publications

Mid-Infrared Chalcogenide Waveguides for Real-Time and Nondestructive Volatile Organic Compound Detection

Mid-Infrared Chalcogenide Waveguides for Real-Time and Nondestructive Volatile Organic Compound Detection

Incremental NH stretching downshift through stepwise nitrogen complexation of pyrrole: a combined jet expansion and matrix isolation study

Enhanced Lycopene Extraction from Tomato Peels by Optimized Mixed-Polarity Solvent Mixtures

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