A Novel Poly{(2,5-diyl furan) (benzylidene)}: A New Synthetic Approach and Electronic Properties

Belmokhtar, A.; Yahiaoui, Ahmed; Hachemaoui, Aïcha; Benyoucef, Abdelghani; Sahli, Nabahat; Belbachir, Mohammed

doi:10.5402/2012/781879

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…5b). We attribute the downward bands centered at 1070 cm −1 (C-O vibration in furan ring) 44 and 1700 cm −1 (C = C) 45 to the disappearance of FA aromatic ring adsorbed on Rh electrode because of hydrogenation. Upward bands at 1300-1500 cm −1 correspond to the appearance of CH 2 due to the FA ECH 44 .…”

Section: Resultsmentioning

confidence: 93%

Electrocatalytic valorization of lignocellulose-derived aromatics at industrial-scale current densities

Peng,

Zhang,

Liang

et al. 2023

Nat Commun

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Electrocatalytic hydrogenation of lignocellulosic bio-oil to value-added chemicals offers an attractive avenue to use the increasing intermittent renewable electricity and biomass-derived feedstocks. However, to date the partial current densities to target products of these reactions are lower than those needed for industrial-scale productivity, which limits its prospects. Here we report a flow-cell system equipped with a Rh diffusion electrode to hydrogenate lignocellulose-derived aromatic monomers, such as furans and lignin monomers, to value-added chemicals. We achieve high faradaic efficiencies up to 64% at industrial-scale current densities of 300–500 mA cm−2, representing high productivities to target products. A screening of electrocatalysts indicates that only by highly-electrolyte-permeable Rh diffusion electrodes are we able to unite current density with faradaic efficiency. We apply in-situ infrared reflection–absorption spectroscopy to investigate the electrode-potential-dependent reaction pathways and intermediates, confirming a wide potential window for efficient electrocatalytic hydrogenation of lignocellulose-derived aromatics to target products.

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Section: Resultsmentioning

confidence: 93%

Electrocatalytic valorization of lignocellulose-derived aromatics at industrial-scale current densities

Peng,

Zhang,

Liang

et al. 2023

Nat Commun

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“…Both the resultant electron in the conduction band electron hole in the valence band are free to migrate inside the crystal lattice a out electrical current conductivity. Small band gaps (from 0.1 to <4 electron volts The refractive index values (n) of the compounds may be approximately expressed by the relation [38,39]…”

Section: Optical Propertiesmentioning

confidence: 99%

Mammalian Cell Cytotoxicity, Antibacterial Activity and the Properties of Methylenebis(Hydroxybenzoic Acid) and Its Related Zinc(II) Complex

Ahmed,

Althobaiti,

Aljohani

et al. 2024

Crystals

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Formaldehyde, sulfuric acid and salicylic acid were combined to create a 3,3′-methylenebis(2-hydroxybenzoic acid) (MHB) ligand, which was subsequently permitted to bind with zinc(II) ions. The ligand and its zinc(II) complex (Zn–MHB) have been described by a combination of elemental analyses, spectral analyses (UV–Vis, IR, MS and NMR), XRD, TEM, as well as TGA measurement. The ligand has been suggested to coordinate to the zinc center in a tetradentate manner forming the binuclear tetrahedral complex. An X-ray analysis indicated a considerable difference between MHB (crystalline) and Zn–MHB (amorphous). The UV–Vis spectra were used to determine the optical properties such as bandgap, refractive index, optical conductivity and penetration depth. The possibility of employing the samples for optoelectronic applications was indicated from the band gap values which underlie the range of semiconductors. TEM revealed the spherical shapes and mutation of ligand particles into the nano-scale by complexation. The antimicrobial potential of the MHB towards Gram-positive and Gram-negative bacterial growths has been investigated. The results suggested that it would be possible to employ MHB to prevent bacterial development, particularly that of salmonella typhimurium. The cytotoxicity of the MHB was assessed against two types of mammalian cells: VERO (the kidney of an African green monkey) and HFB4 (human skin melanocytes). Lower sensitivity was observed in VERO cells.

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“…The refractive index values (n) of the compounds may be approximately expressed by the relation [38,39], r is the usual reflectance in this case. The changes in n values with λ,nm of the incident light are shown in Figure 6c.…”

Section: R + T + A=mentioning

confidence: 99%

Mammalian Cell Cytotoxicity, Antibacterial Activity, and the Properties of Methylenebis[hydroxybenzoic Acid] and Its Related zinc(II) Complex

Hussein Ahmed,

Althobaiti,

Aljohani

et al. 2023

Preprint

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Formaldehyde, sulfuric acid and salicylic acid were combined to create 3,3’-methylenebis[2-hydroxybenzoic acid] (MHB) ligand, which was subsequently permitted to bind with zinc ions. The ligand and its zinc (II) complex (Zn-MHB) have been described by a combination of elemental analyses, spectral (UV-Vis, IR, MS, NMR), XRD, TEM as well as TGA measurement. The ligand has been suggested to coordinate to the zinc center in tetradentate manner forming binuclear tetrahedral complex. An X-ray analysis indicated a considerable difference between MHB (crystalline) and Zn-MHB (amorphous). UV-Vis spectra were used to determine the optical properties such as bandgap, refractive index, optical conductivity and penetration depth. Possibility of employing the samples for optoelectronic applications was indicated from the band gap values which underlie the range of semiconductors. TEM revealed spherical shapes and mutation of ligand particles into nano-scale by complexation. The antimicrobial potential of the MHB towards gram-positive and negative bacterial growths has been investigated. The results suggested that it would be possible to employ MHB to stop bacterial development, particularly salmonella typhimurium. Cytotoxicity of the MHB was assessed against two types of mammalian cells: VERO (the kidney of an African green monkey) and HFB4 (human skin melanocytes). Lower sensitivity was observed in VERO cells.

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A Novel Poly{(2,5-diyl furan) (benzylidene)}: A New Synthetic Approach and Electronic Properties

Cited by 3 publications

References 28 publications

Electrocatalytic valorization of lignocellulose-derived aromatics at industrial-scale current densities

Electrocatalytic valorization of lignocellulose-derived aromatics at industrial-scale current densities

Mammalian Cell Cytotoxicity, Antibacterial Activity and the Properties of Methylenebis(Hydroxybenzoic Acid) and Its Related Zinc(II) Complex

Mammalian Cell Cytotoxicity, Antibacterial Activity, and the Properties of Methylenebis[hydroxybenzoic Acid] and Its Related zinc(II) Complex

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