Acetylacetone (AcAc) has proven to be a potent photo-activator in the degradation of color compounds. The effects of AcAc on the photochemical conversion of five colorless pharmaceuticals were for the first time investigated in both pure and natural waters with the UV/H2O2 process as a reference...
A mixture of acetylacetone and water was condensed in low-temperature Ar matrices at 5 K, and infrared spectra were observed. It was found that the H2O molecules formed hydrogen bonds with the acetylacetone. The structure of the H2O-C5H8O2 complex was estimated with the aid of a density function...
Nanosized titanium dioxide (TiO2) is used in different applications that require a specific crystalline structure. In this work, SBA-15:TiO2 nanocomposites (80 mol% Si and 20 mol% Ti) were prepared using two different synthesis routes (direct and post-synthesis), with and without acetylacetone a...
Quinones are components of electron transport chains in photosynthesis and respiration. Acetylacetone (AA), structurally similar to benzoquinone (BQ) for the presence of two identical carbonyl groups, has been reported as a quinone-like electron shuttle. Both BQ and AA are important chemicals in...
In this computational study we explore the photodynamics of malonaldehyde and compare it to that of the homologous acetylacetone. Upon photoexcitation to the bright S2(ππ∗) state malonaldehyde relaxes to the S1(nπ∗) state on an ultrashort time scale. Once in the S1(nπ∗) state the population ...
This article reports experimental densities ρ, viscosities η, and refractive indices nD, of the ternary systems of formamide (1) + N,N-dimethylacetamide (2) + 2-methyl-1-butanol (3) and the binary systems of formamide (1) + N,N-dimethylacetamide (2), formamide (1) + 2-methyl-1-butanol (3), and...
Studies of wine and wine must fractionation by supercritical carbon dioxide have shown that 3-methyl-1-butanol and 2-phenylethanol are aroma compounds present in sizeable amounts in the extracts. Ternary vapour–liquid equilibrium diagrams for CO2 + 3-methyl-1-butanol + 2-phenylethanol were meas...
Five species of meat-borne, coagulase-negative staphylococci were screened for their in vitro production of 3-methyl-1-butanol. The highest production level was encountered for Staphylococcus sciuri αSG2, despite its poor growth. With respect to Staphylococcus species that are generally applied...
Experimental vapor-liquid equilibrium (VLE) data and mixture properties are reported toward developing a process for the separation of the traditional ABE (acetone + butanol + ethanol) fermentation. Isothermal VLE measurements at 343.2 K were performed by using headspace gas chromatography (HSGC...
Liquid–liquid equilibrium (LLE) data for the ternary system 1-butanol + 3-methyl-1-butanol + water were measured at T = 298.15, 333.15 and 368.15 K under atmospheric pressure, respectively, in this article. The reliability of the experimental data was checked by Othmer–Tobias, Bachman and Hand...
The pentanol isomers 2-methyl-1-butanol and 3-methyl-1-butanol represent commercially interesting alcohols due to their potential application as biofuels. For a sustainable microbial production of these compounds, Corynebacterium glutamicum was engineered for producing 2-methyl-1-butanol and 3-m...
The quantification of aldosterone (ALD) in adrenal tributary venous blood serum/plasma combined with the super-selective adrenal venous sampling (ssAVS) technique is recognized as a definitive procedure for differentiation of the forms of primary aldosteronism (PA), identification of the affecte...
The article describes the synthesis and crystal structure of the Mn(II) complex with 2,6-diacetylpyridine bis(Girard-T hydrazone), (H2dap(GT)2)2+, of the formula [Mn(H2dap(GT)2)(NCS)2](NCS)2·MeOH. The complex has a pentagonal-bipyramidal coordination geometry, with pentadentate N3O2 ligand in t...
The condensation of 2-formyl-pyridine with Girard’s T reagent yields a new hydrazone in the form of an ammonium quaternary salt: [H(2-PyGT)]Cl. This tridentate ligand is readily soluble in water and reacts with iron(III) or copper(II) chlorides to give [Fe(2-PyGT)Cl3] (1) or [Cu(2-PyGT)Cl2]·(H...
Formaldehyde (HCHO) present in ambient air was trapped on a standard minature glass fiber filter impregnated with Girard's reagent T (GRT). The formaldehyde hydrazone formed (i.e. the adduct of formaldehyde and Girard's reagent T, FGA) is desorbed from the filter with water and determi...
The adsorptive voltammetric behaviour of formaldehyde (HCHO) after its in situ derivatization with trimethylaminoacetohydrazide chloride (Girard's reagent T) at a hanging mercury drop electrode (HMDE) was investigated in NH3-NH4Cl (pH 9.7) solution. The results showed that the adduct of HCH...
Capillary electrophoresis (CE) can provide high separation efficiency with very simple instrumentation, but has yet to be explored regarding oxysterols/cholesterol. Cholesterol and 25-hydroxycholesterol (both are 4-ene-3-ketosteroids) were quantitatively transformed into hydrazones using Girard ...
A dinuclear double end-on azido bridged Ni(II) complex [Ni2L2(μ-1,1-N3)2(N3)2] (1) with the condensation product of 2-quinolinecarboxaldehyde and trimethylammonium acetohydrazide chloride (Girard’s T reagent) (HLCl) has been synthesized and characterized by elemental analysis, IR spectroscopy,...
A tridentate NNO condensation product of 2-quinolinecarboxaldehyde and Girard’s T reagent (HLCl) in the presence of azide ions coordinates with cobalt(II) giving mononuclear azido Co(II) complex [CoHL(N3)3] (1) as a main product and dinuclear end-on azido bridged Co(II) complex [Co2L2(μ-1,1-N3...
Sensitive glycomics analysis by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) is of great importance but significantly hampered by their low ionization efficiency and labile sialic acid moieties. Chemical derivatization offers a viable way to improve...
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