Phenolic compound explorer: A mid-infrared spectroscopy database

Abbas, Ouissam; Compère, Géraldine; Larondelle, Yvan; Pompeu, Darly Rodrigues; Rogez, Hervé; Baeten, Vincent

doi:10.1016/j.vibspec.2017.05.008

Cited by 111 publications

(89 citation statements)

References 33 publications

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“…By comparing to density functional theory (DFT) calculations (see Fig. S4 and S5, ESI †) and previous reports, [66][67][68][69][70] we assign the individual absorption bands to the specific molecular bonds. In general, the observed bands fit to the ones expected from the molecular structure of the SAM molecules.…”

Section: Energy and Environmental Science Papermentioning

confidence: 88%

“…2a, the strong band near 1511 cm À1 can be assigned to CQC in-plane stretching vibrations of aromatic rings of the carbazole structure with some contribution from CQC in-plane stretching vibrations of p-methoxy-phenyl groups. [66][67][68]70 The second strongest band of V1036 near 1246 cm À1 can be associated with C-N stretching vibrations. 67,68 Both MeO-2PACz and 2PACz exhibit two bands located near 1490-1494 cm À1 and 1466-1483 cm À1 which are associated with carbazole ring stretching vibrations.…”

Section: Energy and Environmental Science Papermentioning

confidence: 99%

“…[66][67][68]70 The second strongest band of V1036 near 1246 cm À1 can be associated with C-N stretching vibrations. 67,68 Both MeO-2PACz and 2PACz exhibit two bands located near 1490-1494 cm À1 and 1466-1483 cm À1 which are associated with carbazole ring stretching vibrations. Characteristically, 2PACz exhibits two carbazole ring stretching modes at 1242 and 1347 cm À1 and MeO-2PACz a frequency mode at 1582 cm À1 that is associated with the asymmetric stretching vibration of rings with adjacent methoxy groups.…”

Section: Energy and Environmental Science Papermentioning

confidence: 99%

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Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells

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Section: Energy and Environmental Science Papermentioning

confidence: 88%

Section: Energy and Environmental Science Papermentioning

confidence: 99%

Section: Energy and Environmental Science Papermentioning

confidence: 99%

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Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells

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“…The survey of the MIR spectra at the 1755-1400 cm −1 and 1000-870 cm −1 regions for these compounds showed that, MIR method was able to distinguish between flavonoids and phenolic acids families. They finally mentioned that, in order to have a better distinguishment between various families of phenolic compounds it is necessary to investigate a larger number of samples [65].…”

Section: Infrared Spectroscopymentioning

confidence: 99%

Extraction Techniques of Phenolic Compounds from Plants

Jahromi¹

2019

Plant Physiological Aspects of Phenolic Compounds

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Phenolic derivatives are one of the most important compounds that were found in secondary metabolites in plants. According to their various applications in agriculture, food, chemical and pharmaceutical industries, interests in reviewing different procedures of extraction of these compounds from plants have increased. In this chapter, we would like to have an overview on the extraction procedures that have been used in isolating phenolic compounds from plants until this time, including liquid-liquid extraction (LLE), ultrasound-assisted extraction (UAE), microwave-assisted extraction (MAE) and supercritical fluid extraction (SFE). In the following, advantages and disadvantages of these techniques and methods will be discussed and explained. In addition, in the last part of this chapter, various methods for purification and identification of phenolic compounds will be presented.

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“…Based on several functional groups obtained by the FTIR spectra, phenolic compounds and flavonoids contained in java plum leaves that play an important role in the adsorption of FFA. Phenolic compounds consist of one or more aromatic rings and at least one hydroxyl function directly linked to the rings [20]. Hydrogen in these two active compounds bonds with FFA which affects the reduction of FFA levels in coconut oil.…”

Section: Ftir Spectroscopymentioning

confidence: 99%

Adsorption Performance of Low-cost Java Plum Leaves and Guava Fruits as Natural Adsorbents for Removal of Free Fatty Acids from Coconut Oil

Arahman

Fitri

Wirakusuma

et al. 2019

IJE

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A B S T R A C TThis study assesses the adsorption performance of Java plum leaves and guava fruits based adsorbents as natural products widely available in Aceh, Indonesia. These renewable adsorbents were employed to remove free fatty acids (FFAs) that cause the rancid odor in coconut oil. The adsorption tests were carried out at three different doses (50, 75, 100 g) and seven agitating periods (1, 2, 3, 4, 5, 6, 7 h). The adsorbents were characterized by Scanning Electron Microscopy (SEM) to observe their morphologies, and Fourier transform infrared (FTIR) spectroscopy to investigate the functional groups. The adsorption kinetics were also analyzed using the Freundlich and Langmuir isotherm models. The SEM image showed that the particle sizes of the guava fruits based adsorbent were 30-45 µm while those of Java plum leaves based adsorbent were 7-15 µm, both showing attractive range to enhance surface area for adsorption sites. FTIR spectra showed the presence of methylene, aliphatic and phenolic groups for both absorbent, aromatic and alkene groups only for java plum based adsorbent and secondary amine and alcohol groups only for guava fruit based adsorbent. Those groups seem to play important role in enhancing chemical adsorption of FFAs from the coconut oil sample. The results showed that Java plum leaves and guava fruits based adsorbents had a respective maximum adsorption capacity of 144.99 and 133.77 mg/g, with an optimum agitation time of 6 hour. The high absorption capacity could be ascribed from phenolic and flavonoid compounds present in both materials. Kinetics of adsorption of FFAs on both materials obeyed the Freundlich isotherm model indicating a multilayer and heterogeneous surface of adsorbent.

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Phenolic compound explorer: A mid-infrared spectroscopy database

Cited by 111 publications

References 33 publications

Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells

Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells

Extraction Techniques of Phenolic Compounds from Plants

Adsorption Performance of Low-cost Java Plum Leaves and Guava Fruits as Natural Adsorbents for Removal of Free Fatty Acids from Coconut Oil

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