فهرس المقالات nanoanalysis

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  1 - Co3O4/NiO@GQDs@SO3H nanocomposite as high performance catalyst for the preparation of pyrimidines
  Hossein Shahbazi-Alavi Javad Safaei-Ghomi Ali Kareem Abbas
  10.22034/jna.2019.1882952.1174
  Co3O4 / NiO @ GQDs @ SO3H nanocatalyst has been used as an effective catalyst for the preparation of 2,4-diamino-6-arylpyrimidine-5-carbonitrile derivatives through a three-component reaction of malononitrile, aromatic aldehydes and guanidine hydrochloride under reflux أکثر

  Co3O4 / NiO @ GQDs @ SO3H nanocatalyst has been used as an effective catalyst for the preparation of 2,4-diamino-6-arylpyrimidine-5-carbonitrile derivatives through a three-component reaction of malononitrile, aromatic aldehydes and guanidine hydrochloride under reflux conditions in ethanol. The catalyst has been characterized by FT-IR, XRD, SEM, EDS, BET, TGA, XPS and VSM. Atom economy, reusable catalyst, low catalyst loading, applicability to a wide range of substrates and high yields of products are some of the notable features of this protocol.The best results were gained in EtOH and we found that the reaction gave convincing results in the presence of Co3O4/NiO@GQDs@SO3H nanocomposite (4 mg) under reflux conditions. This green nanocatalyst could be used for other significant organic reactions and transformations. Further explorations of similar protocols are underway in our laboratory. This recoverable catalyst will provide a regular platform for heterogeneous catalysis, green chemistry, and environmentally benign protocols in the near future. تفاصيل المقالة
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  2 - Synthesis of Chromenes using functionalized SBA-15
  Hossein Shahbazi-Alavi Atefeh Bakhtiari Javad Safaei-Ghomi Homayoun Gholamzadeh
  10.22034/jna.2022.1928076.1252
  Functionalized SBA - 15 (Immobilization of Pd on the modified SBA - 15) has been utilized as an efficient catalyst for the preparation of chromenes by multi-component reactions of aromatic aldehydes, malononitrile and 4-hydroxycoumarin under reflux in ethanol. The catal أکثر

  Functionalized SBA - 15 (Immobilization of Pd on the modified SBA - 15) has been utilized as an efficient catalyst for the preparation of chromenes by multi-component reactions of aromatic aldehydes, malononitrile and 4-hydroxycoumarin under reflux in ethanol. The catalyst has been characterized by X - ray diffraction spectroscopy ( XRD ), Field emission scanning electron microscopy ( FE - SEM ), Transmission electron microscopy (TEM), Energy-dispersive X - ray spectroscopy ( EDX ), X - Ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FT - IR), N2 adsorption analysis, Temperature Programmed Desorption (TPD), and Differential thermal analysis (TGA - DTA). The structures of the products were deduced from their 1 H NMR, 13 C NMR, FT - IR, and elemental analyses. The advantages of this method include the reusability of the catalyst, low catalyst loading, excellent yields in short reaction times and easy separation of products, with no recrystallization required. تفاصيل المقالة
• حرية الوصول المقاله
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  3 - Co3O4/NiO@GQDs@SO3H nanocomposite as high performance catalyst for the preparation of pyrimidines
  Hossein Shahbazi-Alavi Ali Abbas Javad Safaei-Ghomi
  10.22034/jna.2020.675053
  Co3O4/NiO@GQDs@SO3H nanocatalyst has been used as an effective catalystfor the preparation of 2,4-diamino-6-arylpyrimidine-5-carbonitrile derivativesthrough a three-component reaction of malononitrile, aromatic aldehydes andguanidine hydrochloride under reflux condition أکثر

  Co3O4/NiO@GQDs@SO3H nanocatalyst has been used as an effective catalystfor the preparation of 2,4-diamino-6-arylpyrimidine-5-carbonitrile derivativesthrough a three-component reaction of malononitrile, aromatic aldehydes andguanidine hydrochloride under reflux conditions in ethanol. The catalyst has beencharacterized by FT-IR, XRD, SEM, EDS, BET, TGA, XPS and VSM. Atom economy,reusable catalyst, low catalyst loading, applicability to a wide range of substratesand high yields of products are some of the notable features of this protocol. تفاصيل المقالة