Cr(CO)6/silica samples were prepared in a fluidised bed reactor by vapor phase adsorption of zerovalent chromium hexacarbonyl under N2 flow. Two different preparation methods were used; a vaporisation method without decarbonylation step and a pulse method in which a sample was decarbonylated aft...

The fragmentation processes of internal energy selected chromium hexacarbonyl cations, Cr(CO)6+, were investigated by imaging photoelectron photoion coincidence (iPEPICO) spectroscopy at the VUV beamline of the Swiss Light Source. In the 9.3–21.5 eV photon energy range, Cr(CO)6+ dissociates by ...

The complex Ni0(PPh3)2(CO)2 shows a red photoluminescence (λmax=650 nm) at r.t. It is suggested that this emission originates from a Ni0→PPh3 metal-to-ligand charge transfer triplet.

Two Schiff bases fluorescence sensors (FP1 and FP2) based on fluorescein-monoaldehyde derivatives were designed, synthesized and characterized. The effect of electron-donating and electron-withdrawing substituents on fluorescence of fluorescein was investigated. Through the calculation of the fr...

Aniline is a synthetic compound widely used in industrial and pesticide production, which can lead to environmental pollution. Its high concentration in rivers and lakes is hazardous to aquatic species. Although the mechanism of aniline toxicity has been studied extensively in animals and algae,...

The effect of stereo electronic factors of amino anilines such as ortho-phenylenediamine (OPD) and para-phenylenediamine (PPD) on the fluorescence of 5,6-benzo-4-azidomethyl coumarin (5BAMC) in polar aprotic and polar protic solvents has been studied. From UV absorption and 1 H NMR studies, obse...

Conformations of aniline black molecules were studied using a semi-empirical computer-aided analysis. A strong deformation of the ‘planar structure’ of the molecules has been found.

In this study, the carrier g-C3N4 was prepared by melamine, and the Ag-Pd/g-C3N4 catalyst was synthesized by the NaBH4 reduction method. Different characterization techniques, including SEM, TEM, XRD, UV–vis DRS, XPS, photoluminescence spectra (PL) and BET, were employed to investigate the morp...

UV–Vis spectroscopy, transmission electron microscopy (TEM) and selected area electron diffraction (SAED) have been employed to characterize silver nanoparticles (AgNPs) using aniline and silver nitrate as reductant and oxidant, respectively. A broad surface resonance plasmon (SRP) band appears...

Solid-state fluorescence sensing has become a research hotspot because it is simple and convenient in practical operation. In this study, the carbon dots (CDs)-silica aerogel solid fluorescent material was developed for the selective detection of aniline gas. The blue CDs were prepared by one-st...

Preparation of polyoxometalate/carbon nanocomposite material is one of the hottest research areas in POM chemistry for their multiple functions that might be applied in renewable energy storage and conversion technologies. In the present investigation, we have demonstrated the successful prepara...

The surface of graphene (Gr) was covalently attached by an aniline oligomer, from the coupling of graphene oxide with aniline tetramer, followed by reduction process. After linked by tetramer aniline, the graphene materials showed remarkably enhanced electrochemical performances. The conductivit...

Desulfatiglans anilini is a sulfate-reducing bacterium (SRB) capable of oxidizing aniline, although growth and aniline turnover rates are slow, making it difficult to analyze the metabolism of the strain. Therefore, this study was designed to investigate the effect of sulfide on growth of D. ani...

d-Xylose was converted via 1,2-O-isopropylidene-α-d-xylofuranose (4) into 3-O-benzoyl-5-S-benzoyl-1,2-O-isopropylidene-α-d-xylofuranose which, after methanolysis, acetylation and subsequent acetolysis afforded 1,2,3,4-tetra-O-acetyl-5-thio-α-d-xylopyranose (14) in an overall yield of 36%. Rea...

Four modified substrates for acetylxylan esterases, 2-deoxy, 3-deoxy, 2-deoxy-2-fluoro, and 3-deoxy-3-fluoro derivatives of di-O-acetylated methyl β-d-xylopyranoside were synthesized via 2,3-anhydropentopyranoside precursors. Methyl 2,3-anhydro-4-O-benzyl-β-d-ribopyranoside was transformed int...

Substrate specificity of purified acetylxylan esterase (AcXE) from Trichoderma reesei was investigated on partially and fully acetylated methyl glycopyranosides. Methyl 2,3,4-tri-O-acetyl-β-d-xylopyranoside was deacetylated at positions 2 and 3, yielding methyl 4-O-acetyl-β-d-xylopyranoside in...

A practical synthesis of β-d-GlcA-(1→3)-β-d-Gal-(1→3)-β-d-Gal-(1→4)-β-d-Xyl-(1→OMe) was achieved by coupling of methyl 2,3,4-tri-O-acetyl-α-d-glucopyranosyluronate trichloroacetimidate with a trisaccharide acceptor. The trisaccharide acceptor was obtained by condensation of 3-O-allyl-2,...

Various hydroxycinnamoyl β-d-xylopyranosides were efficiently prepared from 2,3,4-tri-O-acetyl-α-d-xylopyranosyl bromide (TAXB) with amine by amine-promoted glycosylation. The resulted acetylated hydroxycinnamoyl β-d-xylopyranosides with acetoxy groups at C-2, C-3, and C-4 were regioselective...

Lacto-N-neotetraose (LNnT) is a tetrasaccharide naturally occurring in human breast milk, but not in cow’s milk. The safety data generated on a potential new LNnT ingredient produced by chemical synthesis is presented. Standard in vitro genotoxicity tests were performed. LNnT was also administe...

4-Pentenyl (2,3,4,6-tetra-O-acetyl-β-d-galactopyranosyl)-(1→4)-(3,6-di-O-acetyl-2-deoxy-2-phthalimido-β-d-glucopyranosyl)-(1→3)-(2,6-di-O-benzoyl-β-d-galactopyranosyl)-(1→4)-2,3,6-tri-O-benzoyl-β-d-glucopyranoside (4) was synthesized by regioselective glycosylation of 4-pentenyl (2,6,-di-...