The phase equilibrium data on an organic analog of a metal–nonmetal system involving 4-bromochlorobenzene–succinonitrile show the formation of a eutectic and a monotectic with a large miscibility gap containing 0.96 and 0.03 mole fractions of succinonitrile, respectively, with the consolute te...

The conjugated 3,3′,5,5′-tetra(p-X-phenylethynyl)biphenyl derivatives were efficiently obtained by homocoupling of 1-bromo-3,5-di(p-X-phenylethynyl)benzene mediated by zero-valent nickel complexes.The 1-bromo-3,5-di(p-X-phenylethynyl)benzene was previously prepared by heterocoupling between 1-...

A comparative study is reported of the thermal reaction of 1,2- and 1,4-dibromobenzene (1,2- and 1,4-diBrPh) on Si(1 1 1)-7 × 7, investigated by STM. Some results are given for the intermediate case of 1,3-diBrPh. The STM images gave evidence of a different pattern of reaction to yield pairs of...

We report a first attempt, using AM1, to model the thermal reaction of 1,2- and 1,4-dibromobenzene with a Si(1 1 1)-7 × 7 surface, a reaction recently studied experimentally by scanning tunneling microscopy (STM) [S. Dobrin et al., Surf. Sci. 561 (2004) 11]. As postulated on the basis of the ex...

Using ODMR techniques we have observed the three triplet exciton zero-field transitions in 1,4-dibromobenzene. From the results we argue that the excitons have a strong one-dimensional character.

Interfacial properties play a critical role in the dynamic process of carrier transport in dopant-free silicon (Si) heterojunction solar cells (HSCs), based on the poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). In this study, we use quinhydrone (QHY) to engineer the interfa...

In this work, we introduce a novel ZnTe/quinhydrone (ZnTe/QH) nanocomposite as an excellent catalyst for electro-oxidation of ethanol in alkaline medium. The ZnTe semiconductor nanorods were synthesized by a novel chemical route. The synthesized product was characterized by field emission scanni...

The current work focuses on the intensification of fermase catalysed synthesis of ethyl laurate from ethanol and lauric acid in a solvent free condition with ultrasound and stage wise ethanol addition. The effect of molar ratio, stepwise addition of ethanol, catalyst loading, speed of agitation,...

Biodiesel is a liquid mixture of fatty acid esters obtained through the reaction between fats or oils and alcohols. At low temperatures, the esters that constitute biodiesel tend to crystallize, which may be particularly critical for the biodiesel produced from ethanol, process little used or st...

The solid–liquid equilibrium phase diagrams of binary and ternary mixtures formed by n-decane and the fatty acid ethyl esters ethyl laurate and ethyl palmitate were studied through differential scanning calorimetry (DSC). Phase change properties of polymorphs were obtained by resolving the ther...

An experimental study into the solid–liquid equilibrium of ternary mixtures of ethyl laurate, ethyl palmitate and ethyl myristate, commonly present in biodiesel, is presented. Experimental results reveal the polymorphism of ethyl myristate and show the existence of a peritectic-type reaction in...

Biodiesel is a substitute fuel for petroleum-based diesel obtained from vegetables, formed by fatty acid methyl or ethyl esters produced by transesterification reaction between fats or oils and alcohols. An experimental study of solid–liquid equilibrium of ternary mixtures of ethyl esters commo...

The solid–liquid equilibrium diagrams of binary and ternary mixtures formed by dodecylcyclohexane and the fatty acid esters ethyl laurate and ethyl palmitate was determined herein. The liquidus and solidus lines were obtained through differential scanning calorimetry. The thermograms of pure co...

This paper presents measurements of speed of sound, density, viscosity and compressibility in liquid ethyl laurate and methyl laurate along isotherms ranging from (293.15 to 353.15) K at pressures that cover the pressure range of common rail direct fuel injection systems (up to 200 MPa). Measure...

In this work, experimental density data are reported for methyl laurate and ethyl laurate from 283.15 to 363.15 K at pressures up to 60 MPa using a vibrating-tube densimeter. Estimated relative uncertainty of density measurement is 0.001 with a confidence level of 0.95. The experimental data wer...

A flow calorimeter was used to determine the isobaric molar heat capacities of mixtures containing ethyl laurate and ethanol at temperatures from 313.15 K to 343.15 K and pressures up to 25 MPa. The experimental system was verified by measuring the isobaric molar heat capacities of pure ethanol ...

Vapour liquid equilibrium (VLE) data are important for designing and modeling of process equipments. Since it is not always possible to carry out experiments at all possible temperatures and pressures, generally thermodynamic models based on equations of state are used for estimation of VLE. In ...

Vapor–liquid equilibrium (VLE) data were measured for CO2 with ethyl caproate, ethyl caprylate, and ethyl caprate using a semi-flow type apparatus at 308.2, 318.2 and 328.2 K over the pressure range from 1.6 to 9.2 MPa. In this paper, VLE data are reported. The VLE data were also correlated usi...

This work reports the density and viscosity of binary mixtures for n-hexadecane with three fatty acid ethyl esters (ethyl caprylate, ethyl caprate, and ethyl laurate) in the overall composition range at temperatures from 298.15 to 323.15 K and at atmospheric pressure (0.1 MPa). Excess molar volu...

A mesophilic bacterium producing a thermostable alkaline lipase was isolated from oil rich soil sample and identified as Acinetobacter sp. EH28. The lipase was partially purified by ammonium sulphate precipitation followed by hydrophobic interaction chromatography with 24.2-fold purification and...