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A copper-organic framework Cu2(BDC)2DABCO was synthesized, and used as a recyclable heterogeneous catalyst for C-N coupling reaction between benzamide and cyclohexane. 94% yield of N-cyclohexylbenzamide was achieved under the optimized condition. The copper-organic framework catalyst was truly heterogeneous and could be used at least 4 cycles without degradation of catalytic performance.

6p vikwong 29-09-2024 4 1   Download

In this article, the results of the research on organic pollutant treatment in the wastewater of printing processes on fabric by H2O2 under the catalytic role of the complex between ion Ni2+ and Citric acid (H4L) were presented.

5p vikwong 29-09-2024 3 1   Download

Food safety has become an area of primary concern over the past several decades, especially since sociological statistics show a linear association between increased incidence of chronic the level of industrialization, which is associated with environmental pollution, and the scale of industrially processed foods.

18p vifaye 20-09-2024 6 2   Download

In this minireview, the efficiency of the Glauber reaction was evaluated by equilibrium determinations and comparatively viewed in light of today’s principle of sustainability. The manufacture of potassium permanganate through the method based on the Glauber reaction is taking a step in the direction of building a more sustainable world.

3p dianmotminh02 03-05-2024 7 2   Download

In this work, gold nanorods (AuNRs) with well-controlled aspect ratios were prepared using a modified seedgrowth method and covered by TiO2 layers through the hydrothermal reaction to improve stability. Integrating TiO2 with plasmonic rod-like gold nanoparticles could enhance their photo activity by the local surface plasmon resonance (LSPR) effect. AuNRs aspect ratios were controlled by varying the amount of seed solution, reducing agents, surfactant (CTAB), and titanium (IV) but oxide.

7p dianmotminh02 03-05-2024 9 3   Download

A major challenge for outdoor uses of methylammonium lead halide (MAPbX3) solar cells is the poor durability of the perovskite film under humidity. This instability is due to limitations of the dipping or spin coating process in producing MAPbX3 films through a direct reaction between PbI2 and methylammonium iodide (MAI) in an organic solvent. In this study, we devised an eco-friendly and cost-effective method to fabricate MAPbX3 films using an aqueous solution of Pb(NO3)2 and MAI vapour. I

7p dianmotminh02 03-05-2024 9 2   Download

In this work, an attempt to planarize 2,3,4,6- tetraarylthieno[3,2-b]thiophene based on the FeCl3 oxidative annulation was described. Thus, two cyclized 2,3,5,6-tetraarylthieno[3,2-b]thiophenes 5a and 5b were synthesized in moderate yields. NMR and HR-MS analysis indicated the annulation between only one pair of the phenyl substituents.

8p tamynhan9 02-12-2020 11 2   Download

C2H5OH has been using as an alternative fuel for decades; HO2 also plays a pivotal role in the combustion. The kinetics and mechanism for the reaction between C2H5OH and HO2 radical have been investigated using the molecular parameters for the reactants, transition states and products predicted at the CCSD(T)//B3LYP/6-311++G(3df,2p) level of theory.

7p tamynhan6 14-09-2020 16 1   Download

This paper summarizes the reaction of DABCO with the enol tosylate derivatives made from (L-Ser-L-Ser) and (L-Phe-L-Ser) diketopiperazines (DKP’s). The reaction between DABCO and EE-di-tosylate (L-Ser-L-Ser) DKP (2), results in the isomerization of the serine di-tosylate from EE-2 to ZZ-2.

10p tocectocec 25-05-2020 9 2   Download

The quantum-chemical modeling mechanism of the [4+2]-cycloaddition reaction of 2,3 dimethylbuta-1,3-diene and methyl acrylate was conducted. Its qualitative aspects were analyzed at the molecular level by the program MOPAC2012 and semiempirical method RM1.

6p tocectocec 25-05-2020 7 1   Download

The enhancements of zero superconducting transition temperature (Tc,0) in Bi1.6Pb0.4Sr2Ca2- xNaxCu3O10+δ (BPSCCO) are reported. The BPSCCO samples (with x ranging from 0.00 to 0.06) were prepared by using the conventional solid state reaction technique. The properties of the samples were examined by using the X-ray diffraction (XRD), scanning electron microscopy (SEM), and the resistance versus temperature (R-T) measurements.

9p abcxyz123_02 03-03-2020 15 3   Download

Trichloroisocyanuric acid synthesis process was studied by using DFT method. The obtained results demonstrate that the keto-enol isomerization of the cyanuric acid is a base-catalyzed reaction. It is possible that in the presence of NaOH the process of moving hydrogen in the cyanuric acid molecule and the reaction of neutralizing cyanuric acid can execute consecutively. And in this case NaOH plays the role as a donor of hydroxyl group catalyzing the movement of hydrogen and as neutralizing agent in an exothermal process.

6p uocvong04 24-09-2015 61 3   Download

The results of the reaction of selective reduction of NOx by C3H6 on the catalyst Cu/ZSM-5 with the presence of oxygen shown that there was a monotone relation between conversion degree of NOx and the amount of chemically adsorbed NOx [1]. Besides, the existence of amount of irreversiblely adsorbed C3H6 (C3H6ir) on the surface of catalyst Cu/ZSM-5 was detected [2]. The results of the role of C3H6irr towards reduction activity NOx in the studied reaction is presented in this article.

4p uocvong04 24-09-2015 26 3   Download

Nanostructured Au-Ceria has been known as a promising catalyst for the low-temperature water-gas shisft reaction. The catalyst prepared by coprecipitation method with the gold loading various between 2 - 3 at.% with the crystallite size of 2.9 nm has been used to study some factors that effect to catalytic activity and long-term stability of this material.

5p uocvong04 24-09-2015 40 2   Download

The appropriate conditions have been found for syntheses of a series of azomethines using the reaction between cyclohexylamine and different aromatic aldehydes. The structures of products have been determined by the data of IR- and 1 H-NMR-spectra. All obtained azomethines have metallic inhibition corrosion capacities on CT-3 steel and aluminum in different levels. The influences of structures to their metallic inhibition corrosion capacities have been discussed.

6p uocvong03 24-09-2015 42 2   Download

This study is focused on the synthesis of a polyindole doped by indole-3 butyric acid (PI-IBA). IR analyze indicated that the linkage positions of indole involves the position 2 and 3 of the monomer and the insertion of IBA in the polymer backbone. Polyindole IBA doped was incorporated into epoxy resin for protection anticorrosion of carbon steel. The electrochemical impedance measurements show a significantly improvement of protective properties in presence of PI-IBA in comparison with pure epoxy and epoxy containing polyindole coating.

6p uocvong01 24-09-2015 49 4   Download

Large-pore three-dimensional (3D) mesoporous silicas are among the most interesting mesoporous materials discovered in recent years, and they have attracted much attention for potential applications requiring easily accessible, uniform and large pores. Examples of these are SBA-15 (p6 mm) and SBA-16 (Im3m), which have cylindrical- and cage-type structures, respectively.

5p uocvong01 24-09-2015 54 4   Download

This study addresses the interactions between the adaptor protein Shb and components involved in T cell signalling, including SLP-76, Gads, Vav and ZAP70. We show that both SLP-76 and ZAP70 co-immunoprecipitate with Shb in Jurkat T cells and that Shb and Vav co-immunoprecipitate when cotransfected in COS cells. We also demonstrate, utilizing fusion protein constructs, that SLP-76, Gads and Vav associate independently of each other to different domains or regions, of Shb.

10p system191 01-06-2013 34 5   Download

Previous data showing an increase of receptor binding activity of [R16]VIP, a vasoactive intestinal peptide (VIP) structural analogue containing arginine at the position 16 of its amino acid sequence, have pointed out the importance of a positive charge at this site. Here, the functional characterization of three VIP polyaminated adducts (VIPDap, VIPSpd, and VIPSpm), obtained by a transglutaminasecatalysed reaction between the VIP Gln16 residue and 1,3-diaminopropane (Dap), spermidine (Spd), or spermine (Spm), is reported. ...

9p system191 01-06-2013 42 4   Download

A splicing factor SF2/ASF is a natural substrate for the kinase activity of human topoisomerase I. This study demonstrates that SF2/ASF inhibits DNA cleavage by human topoisomerase I induced by the anti-cancer agent camptothecin. The inhibition is independent of the phosphorylation status of SF2/ASF. We show that the inhibition did not result from binding of SF2/ASF to DNA that would hinder interactions between topoisomerase I and DNA. Neither it was a consequence of a loss of sensitivity of the enzyme to camptothecin.

7p research12 01-06-2013 39 5   Download