فهرس المقالات Room temperature

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  1 - High Detectivity in GaN Self –Assembled QDIP at room temperature
  Hossein Fazlali pour Majid Ghandchi
  In this paper, we present a self-assembled (pyramidal shaped) QDIPs, which operates in the long wavelength IR. A pyramidal shaped 6×6×3 𝑛𝑚 GaN quantum dot (QD) in a large rectangular cube box of 18×18×9 𝑛𝑚 dimensions. Solves single-band effec أکثر

  In this paper, we present a self-assembled (pyramidal shaped) QDIPs, which operates in the long wavelength IR. A pyramidal shaped 6×6×3 𝑛𝑚 GaN quantum dot (QD) in a large rectangular cube box of 18×18×9 𝑛𝑚 dimensions. Solves single-band effective mass Schrödinger equation for the gamma conduction band in order to calculate the QD electronic structure. The temperature dependence of the dark current was shown and the amount of dark current at room temperature was equal to 1×〖10〗^(-2) A, which is an acceptable value. The pyramidal GaN QDs has demonstrated exceptionally low dark current, and high detectivity. Detectivity up to 4×〖10〗^9 cm√Hz/W, at room temperature will be the strength of this research. تفاصيل المقالة
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  2 - An air stable and efficient palladium catalyst for Suzuki-Miyaura cross coupling reaction at room temperature
  Raheleh Pourkaveh Hirbod Karimi
  The cross-coupling reaction between phenylboronic acid and various types of aryl halides (Suzuki reaction) was carried out using a catalytic amount of a new palladium catalyst (1-benzyl-3-(1-benzyl-1-methylpyrrolidin-1-ium-2-yl) pyridin-1-ium palladium chloride [DBNT][P أکثر

  The cross-coupling reaction between phenylboronic acid and various types of aryl halides (Suzuki reaction) was carried out using a catalytic amount of a new palladium catalyst (1-benzyl-3-(1-benzyl-1-methylpyrrolidin-1-ium-2-yl) pyridin-1-ium palladium chloride [DBNT][PdCl4]) in poly (ethylene glycol) (PEG-200) in the presence of KOH as the base. This new catalyst was synthesized and characterized by elemental analysis, NMR spectroscopy, UV–visible, and FT-IR spectra. This palladium catalyst is not sensitive to air and moisture, so reactions were carried out without using inert atmosphere at room temperature. The steric and electronic properties of the different substrates had a significant influence on the reaction conditions. This method for the synthesis of biarlys has several key advantages, including mild, environmentally friendly, and phosphine-free reaction conditions, excellent conversions as well as good to excellent yields, facile work-up. تفاصيل المقالة
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  3 - Efficient and eco-friendly synthesis of quinoxalines derivatives catalyzed by acidic ionic liquids at room temperature
  Eshagh Rezaee Nezhad Sami Sajjadifar Sara Miri Saaid Karimian Zahra Abbasi
  In this research, we have developed cheap recyclable and task-specific acidic ionic liquids (AILs) 1-hydrogen-3-methylimidazolium hydrogen sulfate [Hmim]HSO4, 1-hydrogen-3-methylimidazolium chloride [Hmim]Cl, 2-pyrrolidonium hydrogensulfate [Hnhp]HSO4 and applied them i أکثر

  In this research, we have developed cheap recyclable and task-specific acidic ionic liquids (AILs) 1-hydrogen-3-methylimidazolium hydrogen sulfate [Hmim]HSO4, 1-hydrogen-3-methylimidazolium chloride [Hmim]Cl, 2-pyrrolidonium hydrogensulfate [Hnhp]HSO4 and applied them in acid catalyzed synthesis of quinoxaline derivatives from 1,2-phenylendiamines and 1,2-dicarbonyl compounds. The products could be separated from the catalyst simply by filtration and the catalyst could be recycled and reused several times without noticeable loss of efficiency. تفاصيل المقالة
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  4 - Facile and mild synthesis of 1-substituted-1H-1,2,3,4-tetrazoles catalyzed by methanesulfonic acid under solvent-free conditions
  Hossein Naeimi Fatemeh Kiani Mohsen Moradian
  Methanesulfonic acid (MSA) was found to be an efficient catalyst for the synthesis of 1-substituted-1H-1,2,3,4-tetrazoles. A series of 1-substituted tetrazole compounds were synthesized from the reaction of various primary amines, sodium azide and triethyl orthoformate أکثر

  Methanesulfonic acid (MSA) was found to be an efficient catalyst for the synthesis of 1-substituted-1H-1,2,3,4-tetrazoles. A series of 1-substituted tetrazole compounds were synthesized from the reaction of various primary amines, sodium azide and triethyl orthoformate in the presence of catalytic amounts of MSA at room temperature. In this protocol, some of the tetrazole derivatives were synthesized in good to excellent yields and convenient reaction times. This method has the advantages of simple methodology and easy work-up. تفاصيل المقالة