排序方式: 共有87条查询结果,搜索用时 15 毫秒
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Abdolhamid Bamoniri Bi Bi Fatemeh Mirjalili Naimeh Moshtael-Arani 《Green Chemistry Letters and Reviews》2014,7(4):393-403
A series of azo dyes were efficiently synthesized by mixing aromatic amines and NaNO2 in the presence of nano silica supported boron trifluoride (nano BF3·SiO2) and then diazo coupling with 1-naphthol under solvent-free conditions at room temperature. The present methodology has proven to be simple, rapid, environmentally benign, green, and cost-effective compared with previous synthetic methods. Also, by using this procedure, aryl diazonium salts supported on nano BF3·SiO2 were very stable to be kept at room temperature for several months without any special conditions. 相似文献
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In this research, we have used Fe3O4@nano-cellulose–OPO3H as magnetic bio-based nanocatalyst for the synthesis of 2,3-dihydroquinazolin-4(1H)-ones via condensation of 2-aminobenzamide and different aldehydes. The major advantages of the present methodology are good yields, ecofriendly catalyst, and easy workup. 相似文献
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Mohammad Mazloum-Ardakani Mohammad Ali Sheikh-Mohseni Bibi-Fatemeh Mirjalili Roya Ahmadi Mohammad Ali Mirhoseini 《催化学报》2015,(8):1273-1279
在金纳米粒子(AuNPs)上经苯硫酚衍生物(3,4二羟基苯基-偶氮-苯硫酚, DAT)自组装制得了一种新型纳米复合物,用于修饰玻璃碳电极(GCE/AuNP-DAT).采用循环伏安法研究了该新型电极的性质,并将其用作异丙肾上腺素(IP)电催化剂,考察了该纳米复合物的电催化活性,从而得到反应机理和催化反应速率常数.由于GCE/AuNP-DAT电极对尿酸氧化没有电催化活性,因此可将IP的氧化信号从该改进电极中分离出来,从而排除了尿酸对IP测定的干扰.该电极可作为传感器,当用于差动脉冲伏安法测定IP时,线性动态范围为1.0–1500.0μmol/L,检测极限为0.46μmol/L. 相似文献
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Nano-TiO2 as an eco-friendly and efficient nanocatalyst was applied for quinoxaline preparation with improved yield.In this protocol,diketones and 1,2-diamines were condensed in the presence of catalyst at room temperature. 相似文献
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M. A. Karimi Zarchi B. F. Mirjalili Z. Shamsi Kahrizsangi M. Tayefi 《Journal of the Iranian Chemical Society》2010,7(2):455-460
The use of polymeric reagents simplifies routine acylation of carboxylic acid because it eliminates the traditional purification. We describe the use of readily available cross-linked poly(4-vinylpyridine) supported tosyl chloride, [P4VP].TsCl, in the suspended solution phase synthesis of symmetrical anhydrides from carboxylic acids in the presence of K2CO3 in high yields and purity. The products can be obtained by filtration and evaporation of the solvent. 相似文献
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F. Taghavi-Shahri A. Mirjalili M. M. Yazdanpanah 《The European Physical Journal C - Particles and Fields》2011,71(3):1590
We derive the Leading-Order (LO) master equation to extract the polarized gluon distribution G(x,Q
2)=xδg(x,Q
2) from polarized proton structure function, gp1(x,Q2)g^{p}_{1}(x,Q^{2}). By using a Laplace-transform technique, we solve the master equation and derive the polarized gluon distribution inside
the proton. The test of accuracy which is based in our calculations on two different methods, confirms that we achieve to
the correct solution for the polarized gluon distribution. To determine the polarized gluon distribution xδg(x,Q
2) more accurately, we only need to have more experimental data on the polarized structure functions, g1p(x,Q2)g_{1}^{p}(x,Q^{2}). Our result for polarized gluon distribution is in good agreement with some phenomenological models. 相似文献
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3,4-Dihydropyrimidin-2(1H)-ones and 3,4-dihydropyrimidin-2(1H)-thione were synthesized under solvent free condition in the presence of nano-silica supported boron trifluoride (nano-BF3.SiO2). The reactions were carried out at 80 °C for 15 min under solvent free condition. This methods have some advantages such as good to excellent yield, mild reaction condition, ease of operation and workup, short reaction time and high product purity. 相似文献