Hossein Eshghi

Bio: Hossein Eshghi is an academic researcher from Ferdowsi University of Mashhad. The author has contributed to research in topics: Catalysis & One-pot synthesis. The author has an hindex of 34, co-authored 380 publications receiving 4621 citations. Previous affiliations of Hossein Eshghi include University of Sistan and Baluchestan & Islamic Azad University.

Highly Dispersed Multiwalled Carbon Nanotubes Decorated with Ag Nanoparticles in Water and Experimental Investigation of the Thermophysical Properties

Abstract: The present study investigates the dispersion stability, viscosity, shear stress, and thermal conductivity of multiwalled carbon nanotubes in the presence of gum arabic (MWCNT-GA) as well as functionalized MWCNT with cysteine (MWCNT-Cys) and silver (MWCNT-Ag). To realize good dispersibility and high thermal enhancement, MWCNT were first functionalized by cysteine and then silver ions covalently attached through the thiol group of cysteine. This efficient technique of using a combination of functional silver and cysteine based on MWCNT was developed to enhance the thermal conductivity of the MWCNT suspension. At every sequential step of modification, chemical functionalization was investigated by Fourier transform infrared and Raman spectroscopy. Transmission electron microscope imaging confirmed distribution of silver nanoparticles on the MWCNT surface. Viscosity, shear stress, and thermal conductivity behavior of MWCNT-GA/water, MWCNT-Cys, and MWCNT-Ag/water suspensions were studied under various tempera...

Mercury(ii) ion-selective electrode based on dibenzodiazathia-18-crown-6-dione

Abstract: A PVC-based membrane of dibenzodiazathia-18-crown-6-dione reveals a Nernstian potentiometric response for Hg2+over a wide concentration range (8.0×10−6 to 1.0×10−2mol dm−3). It has a response time of about 10s and can be used for at least 3 months without any divergence. The proposed electrode revealed very good selectivities for Hg2+ over a wide variety of alkali, alkaline earth, transition and heavy metal ions and could be used in a pH range of 0.5–2.5. It was successfully used as an indicator electrode in potentiometric titration of mercury ions.

Mercury(II) Ion‐Selective Electrode Based on Dibenzo‐diazathia‐18‐crown‐6‐dione

Abstract: A PVC-based membrane of dibenzodiazathia-18-crown-6-dione reveals a Nernstian potentiometric response for Hg2+over a wide concentration range (8.0×10−6 to 1.0×10−2mol dm−3). It has a response time of about 10s and can be used for at least 3 months without any divergence. The proposed electrode revealed very good selectivities for Hg2+ over a wide variety of alkali, alkaline earth, transition and heavy metal ions and could be used in a pH range of 0.5–2.5. It was successfully used as an indicator electrode in potentiometric titration of mercury ions.

I and i

Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

Ab initio calculation of vibrational absorption and circular dichroism spectra using density functional force fields

Abstract: : The unpolarized absorption and circular dichroism spectra of the fundamental vibrational transitions of the chiral molecule, 4-methyl-2-oxetanone, are calculated ab initio. Harmonic force fields are obtained using Density Functional Theory (DFT), MP2, and SCF methodologies and a 5S4P2D/3S2P (TZ2P) basis set. DFT calculations use the Local Spin Density Approximation (LSDA), BLYP, and Becke3LYP (B3LYP) density functionals. Mid-IR spectra predicted using LSDA, BLYP, and B3LYP force fields are of significantly different quality, the B3LYP force field yielding spectra in clearly superior, and overall excellent, agreement with experiment. The MP2 force field yields spectra in slightly worse agreement with experiment than the B3LYP force field. The SCF force field yields spectra in poor agreement with experiment.The basis set dependence of B3LYP force fields is also explored: the 6-31G* and TZ2P basis sets give very similar results while the 3-21G basis set yields spectra in substantially worse agreements with experiment. jg

Advanced Organic Chemistry

Abstract: Organic Chemistry By Dr. I. L. Finar. Vol. 2: Stereochemistry and the Chemistry of Natural Products. Pp. xi + 733. (London and New York: Longmans, Green and Co., Ltd., 1956.) 40s. net.

Acidic Ionic Liquids.

Abstract: Ionic liquid with acidic properties is an important branch in the wide ionic liquid field and the aim of this article is to cover all aspects of these acidic ionic liquids, especially focusing on the developments in the last four years. The structural diversity and synthesis of acidic ionic liquids are discussed in the introduction sections of this review. In addition, an unambiguous classification system for various types of acidic ionic liquids is presented in the introduction. The physical properties including acidity, thermo-physical properties, ionic conductivity, spectroscopy, and computational studies on acidic ionic liquids are covered in the next sections. The final section provides a comprehensive review on applications of acidic ionic liquids in a wide array of fields including catalysis, CO2 fixation, ionogel, electrolyte, fuel-cell, membrane, biomass processing, biodiesel synthesis, desulfurization of gasoline/diesel, metal processing, and metal electrodeposition.

Electrochemical Analysis of Some Toxic Metals by Ion–Selective Electrodes

Abstract: An overview of potentiometric sensors that are capable of detecting toxic heavy metal ions in environmental samples is presented and discussed. Notwithstanding the tremendous work performed so far,...