Journal of the Iranian Chemical Research: 5 (1)

Open Access Article

1 - Simplex design method in simultaneous spectrophotometric determination of silicate and phosphate in boiler water of power plant and sewage sample by partial least squares
Ali Mohammad Hajishabani Masoud Rohani Moghadam Shayesteh Dadfarnia Jahanbakhsh Ghasemi

Partial least squares modeling as a powerful multivariate statistical tool was applied tothe simultaneous spectrophotometric determination of silicate and phosphate in aqueoussolutions. The concentration range for silicate and phosphate were 0.02-0.6 and 0.4-3 μg ml- More

Partial least squares modeling as a powerful multivariate statistical tool was applied tothe simultaneous spectrophotometric determination of silicate and phosphate in aqueoussolutions. The concentration range for silicate and phosphate were 0.02-0.6 and 0.4-3 μg ml-1,respectively. The experimental calibration set was composed with 30 sample solutions using amixture design for two component mixtures. The absorption spectra were recorded from 500 to900 nm. The optimum conditions were obtained by simplex optimization method. The values ofroot mean square error of prediction (RMSEP) for silicate and phosphate using partial leastsquares (PLS) were 0.0017 and 0.02 μg ml-1, respectively. The effects of various cations andanions on detection of silicate and phosphate were investigated. The method was successfullyused for determination of silicate and phosphate in boiler water at power plant, well water andsewage samples. Manuscript profile

Open Access Article

2 - Structural characterization of BaZrO3 nanopowders prepared by stearic acid gel method
Morteza Enhessari Salah Khanahmadzadeh Keyvan Ozaee

Pure barium zirconate nanopowders were successfully prepared in wet-chemistry synthesismethod, using barium stearate and tetra-n-butyl zirconate as Ba, Zr sources and stearic acid ascomplexing reagent. The gel was calcined at 800 and 900 °C in air. Results of therma More

Pure barium zirconate nanopowders were successfully prepared in wet-chemistry synthesismethod, using barium stearate and tetra-n-butyl zirconate as Ba, Zr sources and stearic acid ascomplexing reagent. The gel was calcined at 800 and 900 °C in air. Results of thermal analysisare given, including both DTG and TG. Fourier transform infrared spectrometry (FTIR), X-raydiffraction (XRD), transmission electron microscopy and (TEM) scanning electron microscopy(SEM) were used to characterize the crystallization process, the particle size and morphology ofthe calcined powders. The results indicated that barium zirconate nanopowders with particle sizebetween 20 and 25 nm could be obtained after calcinations of the dried gel at 900 °C for 2 h. Manuscript profile

Open Access Article

3 - DFT studies of all fluorothiophenes and their radical cations as candidate monomers for conductive polymers
Saeed Jameh-Bozorghi Hossein Shirani

In this paper, electronic, structural, and spectroscopic properties of mono-, di-, tri-, andtetrafluorothiophenes and their radical cations are studied using the density functional theory andB3LYP method with 6-311++G** basis set. Also the effects of the number and posi More

In this paper, electronic, structural, and spectroscopic properties of mono-, di-, tri-, andtetrafluorothiophenes and their radical cations are studied using the density functional theory andB3LYP method with 6-311++G** basis set. Also the effects of the number and position of thesubstituent on the electrochemical properties of the thiophene ring have been studied usingoptimized structures obtained for these molecules and their cations, vibrational frequencies andnuclear chemical shielding constants of these compounds have been calculated and analyzed.The results of this study including charge and spin-density distribution, size and direction of thedipole moment vector, ionization potential, electric polarizability and NICS show that among allof these compounds 3-fluorothiophene as candidate monomer for new conductive polymers,possesses the most suitable conditions for electropolymerization. Manuscript profile

Open Access Article

4 - Simultaneous spectrophotometric determination of lidocaine and hydrocortisone acetate in pharmaceutical preparations by multivariate calibration methods
Amir H.M. Sarrafi Manochehr Bahmaei Assieh Z. Mousavi

The multivariate calibration method, partial least square regression (PLS) was applied for thesimultaneous spectrophotometric determination of Lidocaine (LID) and Hydrocortisone acetate(HCA) in their mixtures. The parameters of chemometric technique were optimized and t More

The multivariate calibration method, partial least square regression (PLS) was applied for thesimultaneous spectrophotometric determination of Lidocaine (LID) and Hydrocortisone acetate(HCA) in their mixtures. The parameters of chemometric technique were optimized and theproposed method was validated with synthetic samples and applied to analyze these drugs inpharmaceutical products with good accuracy and precision. The results were compared with theHPLC method. The squares of correlation coefficients (R2) for predicted LID and HCA with theproposed method in test samples were 0.9970 and 0.9964, respectively. The relative standarddeviations for commercial products were less than 1%. Manuscript profile

Open Access Article

5 - Isolation and structure elucidation of a new alkaloid from the Indonesian Blue-Green Alga Arthrospira platensis
Hanggara Sudrajat Katherine Ma Zaky Al-Fatony

A new alkaloid (1) and two known compounds (2 and 3) were isolated from the blue-greenalga Arthrospira platensis. Their structures were determined on the basis of spectroscopic data.According to the obtained data and values in the literature, the compounds were conclude More

A new alkaloid (1) and two known compounds (2 and 3) were isolated from the blue-greenalga Arthrospira platensis. Their structures were determined on the basis of spectroscopic data.According to the obtained data and values in the literature, the compounds were concluded to beeckol. Manuscript profile

Open Access Article

6 - Synthesis and Characterization of New Copoly(amide-imide)s Based on 1,3- bis[4,4'-(trimellitimido)phenoxy]propane and Fumaric acid
Khalil Faghihi Akram Feyzi Reza Mohammadi Pour

In this article six new copoly(amide-imide)s (11a-c) were synthesized through the directpolycondensation reaction of 1,3-bis[4,4'-(trimellitimido) phenoxy] propane (6) with 3,3'-diamino diphenyl sulfone (7), 4,4'-diaminodiphenyl ether (8) and 1,5-naphtalene (9) in thepr More

In this article six new copoly(amide-imide)s (11a-c) were synthesized through the directpolycondensation reaction of 1,3-bis[4,4'-(trimellitimido) phenoxy] propane (6) with 3,3'-diamino diphenyl sulfone (7), 4,4'-diaminodiphenyl ether (8) and 1,5-naphtalene (9) in thepresence of fumaric acid (10) as a second diacid in a medium consisting of N-methyl-2-pyrrolidone, triphenyl phosphite, calcium chloride and pyridine. The resulted polymers werefully characterized by means of FT-IR spectroscopy, elemental analyses, inherent viscosity, andsolubility tests. Thermal stabilities of a polymer (11a-c) were investigated by using TGA & DTGthermograms. Manuscript profile

Open Access Article

7 - Three-dimensional quantitative structure activity relationship approach series of 3-Bromo-4-(1-H-3-Indolyl)-2, 5-Dihydro-1H-2, 5- Pyrroledione as antibacterial agents
Mukesh Chandra Sharma Smita Sharma Dharm Veer Kohli Subash Chandra Chaturvedi

The use of quantitative structure–activity relationships, since its advent, has becomeincreasingly helpful in understanding many aspects of biochemical interactions in drug research.This approach was utilized to explain the relationship of structure with biologica More

The use of quantitative structure–activity relationships, since its advent, has becomeincreasingly helpful in understanding many aspects of biochemical interactions in drug research.This approach was utilized to explain the relationship of structure with biological activity ofantibacterial. For the development of new fungicides against, the quantitative structural–activityrelationship (QSAR) analyses for fungicidal activities of Pyrroledione Derivatives were carriedout using multiple linear regression (MLR) Quantitative structure–activity relationship (QSAR)analysis was performed on a series of 3-Bromo-4-(1-H-3-Indolyl)-2, 5-Dihydro-1H-2, 5-Pyrroledione Derivatives.QSAR investigations were based on Hansch's extra thermodynamicmulti-parameter approach. QSAR investigations reveal that steric and electrostatic interactionsare primarily responsible for enzyme–ligand interaction. These studies produced good predictivemodels and give statistically significant correlations of selective COX-2 inhibitory with physicalproperty, connectivity and conformation of molecule. Also when available COX-1 inhibitorydata was analyzed with descriptors obtained from chem. Office 2007, partial charge descriptor,van der Waal’s surface area and solvation energy gave statistically significant results. The resultsobtained by combining these methodologies give insights into the key features for designingmore potent analogs antibacterial. Manuscript profile

Open Access Article

8 - Antiplasmodial ativity of akaloids from Garcinia Parvifolia Miq. Stem Bark
U.Z. Lathifah R.A. Rahima H. Sudrajat S. Khairi

Garciniavalline (1), a novel aporphinoid alkaloid, in addition to four known alkaloids,cleistopholine (2), O-methylmoschatoline (3), (-)-oliveroline (4) and (-)-oliveridine (5), wereisolated and characterized from Garcinia Parvifolia Miq. stem bark. Structural elucidati More

Garciniavalline (1), a novel aporphinoid alkaloid, in addition to four known alkaloids,cleistopholine (2), O-methylmoschatoline (3), (-)-oliveroline (4) and (-)-oliveridine (5), wereisolated and characterized from Garcinia Parvifolia Miq. stem bark. Structural elucidation ofthese compounds was established by spectroscopic methods. Among them, alkaloids (2) and (4)exhibited antiplasmodial activity against Plasmodium falciparum Manuscript profile

XML

List of Articles