فهرست مقالات Ethylenediamine

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  1 - Synthesis and Physicochemical Characterization of New Amidic Derivative of Sodium Alginate
  Shokouh Khodayar Mohammad Reza Shushizadeh Elham Tahanpesar Behzad Sharif Makhmalzadeh Haleh Sanaeishoar
  In this study, our objective was to synthesis a new derivative of alginate, a natural biocompatible, biodegradable and non-toxic biopolymer to improve the gelling mechanism. For this purpose, ethylenediamine (EDA) was coupled to sodium alginate (NaA) in an aqueous-phase چکیده کامل

  In this study, our objective was to synthesis a new derivative of alginate, a natural biocompatible, biodegradable and non-toxic biopolymer to improve the gelling mechanism. For this purpose, ethylenediamine (EDA) was coupled to sodium alginate (NaA) in an aqueous-phase reaction using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC-HCl) and N-hydroxy succinimide (NHS) as coupling reagents to synthesis ethylenediamine-grafted amphiphilic sodium alginate-amide derivative (NaA-g-EDA). Synthesized derivative showed no environmental sensitivity but the swelling percentage of hydrogels shows that hydrogels obtained from NaA-g-EDA had higher water absorption compared to non-functionalized sodium alginate. It seems that hydrogels can uptake water more than 100% of their weight but in a slow manner. This character is a perfect property for wound dressing. Biodegradable synthesized hydrogel can be decomposed into non-toxic by-products. The purity and grafting of copolymers were characterized using fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (1HNMR), X-ray diffraction (XRD), and elemental analysis (CHNX). These analytical methods confirmed the structure of NaA-g-EDA. پرونده مقاله
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  2 - Ecofriendly synthesis of biscoumarin derivatives catalyzed by EDTA-modified magnetic animal bone meal nanoparticles in water
  Ahmad Reza Momeni Sadegh Bakhtiar
  In this research, magnetic animal bone meal nanoparticles functionalized with ethylenediaminetetraacetic acid (Fe3O4@ABM-EDTA) is reported as a green recyclable catalyst that catalyzed synthesis of biscoumarin derivatives in water. The catalyst was characterized by the چکیده کامل

  In this research, magnetic animal bone meal nanoparticles functionalized with ethylenediaminetetraacetic acid (Fe3O4@ABM-EDTA) is reported as a green recyclable catalyst that catalyzed synthesis of biscoumarin derivatives in water. The catalyst was characterized by the Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), differential thermogravimetric (DTG), scanning electron microscope (SEM) and X-ray diffraction (XRD). This study has demonstrated that Fe3O4@ABM-EDTA can act as an efficient catalyst for synthesis of biscoumarines in the presence of water as solvent at reflux conditions. A wide range of aldehydes could react with 2-hydroxycoumarin and give biscoumarin derivatives in excellent yields. Moreover, Fe3O4@ABM-EDTA was magnetically recovered and reused for five cycles without any significant loss of efficiency. پرونده مقاله
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  3 - Separation of Trace Amount Cu (II) Using Octadecyl Silica Membrane Disks - Nano Graphene Modified N, N -disalicylideneethylenediamine
  Ali Moghimi
  10.22034/jchr.2018.544063
  A simple, highly sensitive, accurate and selective method was presented for determination of trace amounts of Cu (II) in water samples. The stability of an N, N´ -disalicylideneethylenediamine modified Nano Geraphene especially in concentrated hydrochloric acid was stu چکیده کامل

  A simple, highly sensitive, accurate and selective method was presented for determination of trace amounts of Cu (II) in water samples. The stability of an N, N´ -disalicylideneethylenediamine modified Nano Geraphene especially in concentrated hydrochloric acid was studied which used as a recycling and pre-concentration reagent for further uses of N, N´-disalicylideneethylenediamine modified Nano Geraphene. The method was based on N, N´ -disalicylideneethylenediamine modified Nano Gerapheneof Cu (II) on surfactant coated C18, modified with a N, N´ -disalicylideneethylenediamine modified Nano Geraphene. The retained ions were then eluted with 4 ml of 4 M nitric acid and determined by flame atomic absorption spectrometry (FAAS) at 283.3 nm for Cu. The influence of flow rates of sample and eluent solutions, pH, breakthrough volume, effect of foreign ions were investigated on chelation and recovery. (1.5 g of surfactant coated C18 adsorbs 40 mg of the Schiff’s base which in turn can retain 15.2±0.8mg of ion) The limit of detection (3σ) for Cu (II) was found to be 3.20 ng l -1. The enrichment factor for both ions was 100. The mentioned method was successfully applied on determination of Cu in different water samples. The ions were also speciated by means of three- column system. پرونده مقاله
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  4 - Extraction and Separation of Trace Amounts Lead (П) in Water Samples Using Nano Polyacrylonitril Modified Ethylendiamins
  Ali Moghimi Hamid Hashemi-Moghaddam
  10.22034/jchr.2015.544098
  A simple, sensitive and selective method for extraction of trace amounts of Pb (II) in water samples based on the adsorption of its modification nano polyacrylonitrile fiber (PANF) was examined in this study. PANF was prepared by adding acrylic fibers to ethylendiamin ( چکیده کامل

  A simple, sensitive and selective method for extraction of trace amounts of Pb (II) in water samples based on the adsorption of its modification nano polyacrylonitrile fiber (PANF) was examined in this study. PANF was prepared by adding acrylic fibers to ethylendiamin (EDA) with different concentration solutions. A new technique using a solid phase extraction (SPE) cartridge with modified PANF as sorbent was developed for the preconcentration of trace amounts of lead and was determined by flame atomic absorption spectrometry (FAAS). Ethylenediamine plays a key role as chelating reagent on ultrahigh specific surface of PANF. Some of the important parameters on the preconcentration and complex formation were selected and optimized. Under the optimized conditions the limit of detection (LOD) and limit of quantification (LOQ) were 0.167, 0.562 and the proposed method has a good reproducibility 0.81% (RSD %). The enrichment factor was 200 and the percentage of recovery was in the range of 95-100%. The method was successfully applied to the recovery of Pb2+in different type of water samples. PANF and its derivate such as PANF-EDA in this study are full of potential to use as an excellent adsorbent in the extraction method like SPE and solid phase micro extraction (SPME).    پرونده مقاله