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Open Access Article
1 - Synthesis of Some Arylidene Heterobicyclic Compounds using Nano Al2O3-SO3H under Sonication Conditions
Noshin Seif Asadollah Farhadi Rashid Badri Ali Reza KiasatThe condensation of aromatic aldehydes, cyclopentanone and urea promoted by nano Al2O3-SO3H and HCl (aq) as heterogeneous and homogeneous catalysts, respectively, have been developed for the synthesis of some arylidene heterobicyclic compounds. In this synthesis, we hav MoreThe condensation of aromatic aldehydes, cyclopentanone and urea promoted by nano Al2O3-SO3H and HCl (aq) as heterogeneous and homogeneous catalysts, respectively, have been developed for the synthesis of some arylidene heterobicyclic compounds. In this synthesis, we have used two methods with sonication and thermal condition that have several advantages such as excellent yields and short reaction times. The ultrasonic device used in this study includes an ultrasonic bath equipped with a thermal system designed and built in our laboratory. Manuscript profile -
Open Access Article
2 - Corrosion Protection of AISI 304 Stainless Steel using Thin Films of Manganese Nitride
Fatemeh AbdiIn this work, the thin films of manganese nitride were used to protect AISI 304 stainless steel against corrosion in 3.5% salt solution. These coatings were prepared using the physical vapor deposition of manganese. After deposition, the samples were placed in a furnace MoreIn this work, the thin films of manganese nitride were used to protect AISI 304 stainless steel against corrosion in 3.5% salt solution. These coatings were prepared using the physical vapor deposition of manganese. After deposition, the samples were placed in a furnace under nitrogen flux for nitriding. The crystal structure of the samples was studied using X-ray diffraction (XRD) pattern, and the formation of manganese nitride phase was observed. An atomic force microscope (AFM) was used to investigate the surface morphology of the samples. To evaluate the corrosion resistance of the structures, EiS and polarization tests were performed on the samples. the corrosion resistance of the samples was obtained by simulating the equivalent circuit. Finally, the surface of the corroded samples was observed using scanning electron microscopy (SEM). Manuscript profile -
Open Access Article
3 - Determination of Doxorubicin in Urine Samples using Syringe to Syringe Dispersive Liquid-Phase Microextraction through Fluorescence Spectrometry
Ozra Alimohammadi Majid Ramezani Mohammad AlimoradiIn this research, to identify the trace amount of doxorubicin, a syringe-to-syringe dispersive liquidphase microextraction (SS-DLPME) procedure combined with fluorescence spectrometry was applied. The syringe-to-syringe process was used to speed up the formation of the MoreIn this research, to identify the trace amount of doxorubicin, a syringe-to-syringe dispersive liquidphase microextraction (SS-DLPME) procedure combined with fluorescence spectrometry was applied. The syringe-to-syringe process was used to speed up the formation of the acceptable cloudy solution by a low volume of extraction solvent, which reduced the equilibrium time and increased the extraction efficiency. To optimize the parameters affecting the procedure, pH, type and volume of extraction solvent, the effect of salt, the number of injections, and the centrifuge speed were investigated. Under optimal conditions, the linear range of doxorubicin was found to be3.0-300.0 ng mL-1. The limit of detection, the limit of quantification, inter-day, and intra-day precision (RSD%) were 0.76, 2.55 ng mL-1, 0.82-2.11% and 1.20- 2.37%, respectively. The proposed method was successfully applied for pre-concentration and determination of the doxorubicin in urine samples. Manuscript profile -
Open Access Article
4 - Solvatochromic and Photochromic behavior of 1',3',3'-trimethyl-8-nitrospiro[chromene-2,2'-indoline]
Zeinalabedin Sepehr Hossein Nasr-Isfahani Ali Reza Mahdavian1',3',3'-trimethyl-8-nitrospiro[chromene-2,2'-indoline] is one of the spiropyran derivatives. In recent years, the spiropyran derivatives have been studied numerously for their photochromic properties.We know these compounds as an isomeric system. The closed-ring spirop More1',3',3'-trimethyl-8-nitrospiro[chromene-2,2'-indoline] is one of the spiropyran derivatives. In recent years, the spiropyran derivatives have been studied numerously for their photochromic properties.We know these compounds as an isomeric system. The closed-ring spiropyran (SP) could be converted into the open-ring merocyanine (MC) upon UV irradiation. In this work, 1',3',3'-trimethyl-8-nitrospiro[chromene-2,2'-indoline] is prepared, and subsequently, characterized by the FT-IR, 1H-NMR, and 13C-NMR spectroscopic techniques. In order to confirm its molecular structure, the UV–visible spectroscopic analysis of its solutions is studied in different solvents in the spectral range of 250-750 nm before and after exposure to a UV lamp. The 1',3',3'-trimethyl-8-nitrospiro[chromene-2,2'-indoline]chromophore shows a solvatochromism behavior: the spiropyran solution in acetonitrile is completely colorless, while its solution is pale blue in DMF and dark purple in ethanol and methanol. The visible spectra of the spiropyran solutions show that the solvents methanol and ethanol are capable of stabilizing the MC form better than the solvents DMF and acetonitrile, and that this photochromic compound has a higher absorption intensity in the visible region. Manuscript profile -
Open Access Article
5 - Silane‐Functionalized Organic Macrocyclic Compounds‐Modified UVCurable Polyurethane Coatings: Synthesisand Properties
Afsaneh Barekat Behzad Shirkavand Hadavand Ayeh Rayatzadeh Rashid BadriThree-dimensional polymer based porous calix[4]resorcinarene has many applications due to its special properties. The special structure of this polymer and having hydroxyl groups in it can provide the necessary conditions for making derivatives with other functional gro MoreThree-dimensional polymer based porous calix[4]resorcinarene has many applications due to its special properties. The special structure of this polymer and having hydroxyl groups in it can provide the necessary conditions for making derivatives with other functional groups so that we can prepare other compounds with other applications. To create functional groups and modify the surface of the polymer, silane coupling agent can be a good option to create new properties and effective applications in the porous surfaces of polymer calix[4]resorcinarene. This research intends to provide a simple method for the use of poly(calix[4]resorcinarene) in ultra violet curable organiccoatings. For this purpose, first the poly(calix[4]resorcinarene) was synthesized and then, by surface modification, double carbon-carbon bonds were created on it so that we could use it in radiant coatings. Then, after characterizing the synthesized materials, the structure and properties have been studied. The results confirmed the structure of the synthesized materials. Surface modification improved the distribution of particles in the polymer matrix and provided better coatings also thermal stability of urethane acrylate resin increased. Manuscript profile -
Open Access Article
6 - Electrocatalytic Determination of Anti-Cancer Drug Imatinib, Using Ni Nanoparticle Modified Carbon Paste Electrode
Fatemeh Khakpoor Shahla FathiIn this research, nickel nanoparticles were synthesized by non-aqueous polyol method and morphology of nanoparticles was studied using scanning electron microscopy. Then Ni nanoparticle modified carbon paste electrode was prepared. Electrochemical behavior of modified e MoreIn this research, nickel nanoparticles were synthesized by non-aqueous polyol method and morphology of nanoparticles was studied using scanning electron microscopy. Then Ni nanoparticle modified carbon paste electrode was prepared. Electrochemical behavior of modified electrode was studied in basic solution, using cyclic voltammetry and chronoamperometry methods. A pair of oxidation-reduction peaks relating to Ni(OH)2/ NiOOH redox couple was observed in cyclic voltammogram of this electrode. Also, the electrochemical behavior of this electrode in presence of imatinib drug was studied. Results show that this modified electrode has a good ability for electrocatalytic oxidation of imatinib in basic solution. In presence of imatinib, current intensity of oxidation peak of electrode was increased, depending on its concentration. Linear dynamic range, limit of detection and rate constant of electrocatalytic reaction were determined using cyclic voltammetry and chronoamperometry methods. Amount of limit of detection (LOD) in cyclic voltammetry and hydrodynamic amperometry methods were calculated 1.2 × 10 -6 M and 3.5 × 10-7M respectively. Finally, the proposed sensor was successfully applied for determination of imatinibin real samples such as tablet and human blood plasma. Manuscript profile
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