In the present work, non-edible oil source, Jatropha curcas oil was used with base catalyzed methanol and ethanol to produce biodiesel using in situ transesterification assisted by Benzyltrimethylammonium hydroxide (BTMAOH) as a phase transfer catalyst (PTC). Experimental investigation showed th...

The adiabatic ionization energy of p-methylanisole is measured to be 63 972 ± 5 cm−1, which is red-shifted with respect to those of anisole and toluene. This indicates that the interaction of either CH3 or OCH3 group with the ring is stronger in the cationic D0 state than that in the neutral S0...

Accurate standard molar enthalpy of formation values in the liquid phase can be obtained by combining high-level quantum chemistry values of gas-phase enthalpies of formation with experimentally determined enthalpies of vaporisation. The procedure is illustrated for 2-, 3-, and 4-methyl-anisoles...

Lignocellulosic biomass is considered as a very promising alternative to replace fossil sources due to its abundance, consistency with environment and renewability. Conversion of lignin biomass to bio-oil by flash pyrolysis is considered recently due to its feasibility and economical profits. Th...

In this study, we recorded the vibronic and cation spectra of trans-o-methylanisole by using resonant two-photon ionization and mass-analyzed threshold ionization techniques. The excitation energy of the S1 ← S0 transition and the adiabatic ionization energy were measured as 36,364 ± 2 cm−1 an...

Photoaddition of ethylvinylether to 3-methylanisole yields six derivatives of 1-methoxytricyclo[3.3.0.02,8]oct-3-ene. Four of the adducts have the ethoxy group in an endo position. Products in which the methyl group is at position 4 are favoured. Photoaddition of ethylvinylether to 3-fluoroaniso...

The measurement and correlation of the experimental binary diffusion coefficients of 2,3-dimethylaniline, 2,6-dimethylaniline, 2-methylanisole, 4-methylanisole and 3-nitrotoluene in supercritical carbon dioxide is reported. Results were obtained using the Taylor-Aris dispersion technique, at 313...

Emission spectra of 3- and 4-hydroxybenzaldehyde vapors have been measured along with the excitation and absorption spectra. It is inferred from the temperature dependence of the phosphorescence spectrum that the phosphorescence of 4-hydroxybenzaldehyde vapor originates from the T2(n, π*) state...

In this study, the adsorption kinetics of 3-hydroxybenzaldehyde dissolved in ethanol on native and activated (acid/heat activation) bentonites were examined. The specific surface areas, pore size and pore-size distributions of the samples were fully characterized. The cation exchange capacities ...

Ab initio conformers and dimers have been computed at RHF and B3LYP/6-31G* levels for isomers 2-chloro-3-hydroxybenzaldehyde and 3-chloro-4-hydroxybenzaldehyde to explain the observed infrared absorption and Raman vibrational spectral features in the region 3500–50 cm−1. The position of the chl...

Reported in the present work are the values of the gaseous standard (p∘=0.1MPa) molar enthalpies of formation of 3-hydroxybenzaldehyde (3HBA), 4-hydroxybenzaldehyde (4HBA), and 3,5-di-tert-butyl-2-hydroxybenzaldehyde (3,5DTBHBA), at T = 298.15 K. For the three compounds, the values were derived...

To understand the phase behavior of 3-hydroxybenzaldehyde (3-HBA) and the solubility effect of 3-HBA and 4-hydroxybenzaldehyde (4-HBA) on each other in supercritical carbon dioxide (SCCO2), the equilibrium solubility of 3-HBA and its mixture with 4-HBA, was measured in SCCO2 binary system (compr...

Phase equilibria of 3-methylstyrene, 4-methylstyrene, alpha-methylstyrene and a methylstyrene mixture (mainly 3-methylstyrene (60% mol) and 4-methylstyrene (40% mol)) in supercritical CO2 were measured using high-pressure variable-volume view cells based on the static synthetic method. The syste...

Solketal methyl ether (SME) was synthesized from glycerol by conversion with methanol followed by ketalization with acetone. The values for the equilibrium constant of the ketalization of glycerol and glycerol 1-monomethyl ether in the temperature range of 298–323 K were determined experimental...

Crude glycerol is an undesired by-product of biodiesel production with a low commercial value (i.e. a ton of biodiesel results in around 110 kg of crude glycerol) and, thus, glycerol needs valorization. In particular, there is a need of providing a benefit to alkaline wastewaters from biodiesel ...

The aim of this work is to analyze the possibility of separating isopropyl acetate and 2-propanol, an azeotropic system, by using glycerol. Thus, liquid–liquid equilibrium (LLE) data for the ternary system of isopropyl acetate + 2-propanol + glycerin have been determined at various temperatures...

This study reports engineering of a hypertransformable variant of C. pasteurianum for bioconversion of glycerol into hydrogen (H2). A functional glycerol-triggered hydrogen pathway was engineered based on two approaches: (1) increasing product yield by overexpression of immediate enzyme catalyzi...

Quaternary ammonium compounds (QACs) are amphiphilic molecules displaying a broad-spectrum of antibacterial activity. QACs are commonly used antiseptics in industrial, home and hospital settings. Given the emergence of the QAC-resistant bacteria, there is an urgent need to design new QACs with g...

This work deals with development of polyfunctional biocompatible cationic surfactant systems based on bioactive saturated bicyclic alkaloid quinuclidine. It is focused on the effect of the chemical structure of surfactants on their aggregation behavior, their physicochemical estimation of solubi...

The present review focuses on strategies for the construction of piperidines and dehydropiperidines, which have appeared in the literature since 2003/2004 through mid-2016. Synthetic methods involving the construction of the six-membered ring from essentially acyclic starting materials in intra-...