فهرست مطالب

Journal of Applied Chemical Research
Volume:15 Issue: 4, Autumn 2021

  • تاریخ انتشار: 1400/09/08
  • تعداد عناوین: 6
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  • Noshin Seif, Asadollah Farhadi *, Rashid Badri, AliReza Kiasat Pages 8-18

    The 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.

    Keywords: Arylidene heterobicyclic compounds, Nano Al2O3-SO3H, HCl (aq), Sonication ondition, Cyclopentanone
  • Fatemeh Abdi Pages 19-33

    In  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).

    Keywords: AISI 304 SS, Corrosion, Manganese Nitride, EIS, Equivalent circuit
  • Ozra Alimohammadi, Majid Ramezani *, Mohammad Alimoradi Pages 34-44
    In 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 be 3.0-300.0  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.
    Keywords: Doxorubicin, Syringe to syringe dispersive liquid-phase microextraction, Fluorescence spectrometry, Urine sample
  • Zeinalabedin Sepehr, Hossein Nasr Isfahani *, AliReza Mahdavian Pages 45-55

    1',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.

    Keywords: Photochromism, Spiropyran, 3-nitrosalicylaldehyde, Solvatochromism
  • Afsaneh Barekat, Behzad Shirkavand Hadavand *, Ayeh Rayatzadeh, Rashid Badri Pages 56-66
    Three-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 organic coatings. 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.
    Keywords: Poly(calix[4]resorcinarene), Porous polymer, UV-curable coatings, Surface modification
  • Fatemeh Khakpoor, Shahla Fathi * Pages 67-78

    In  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 imatinib in real samples such as tablet and human blood plasma.

    Keywords: Electrocatalytic oxidation, nickel nanoparticles, Non-aqueous polyol method, Imatinib