2020-07-16T03:01:33Z https://www.ajnanomat.com/?_action=export&rf=summon&issue=12482
2019-10-01
Asian Journal of Nanosciences and Materials Asian J. Nanosci. Mater. 2645-775X 2645-775X 2019 2 4 Highly effective synthesis of 3, 4-dihydropyrimidin-2 (1H)-ones using pyridinium-N-sulfonic acid bisulfate as a dual-functional catalyst Sima Dehghani Maria Merajoddin Abdolkarim Zare Acidic ionic liquid pyridinium-<em>N</em>-sulfonic acid bisulfate ([Py-SO<sub>3</sub>H][HSO<sub>4</sub>]) has effectively catalyzed the production of 3, 4-dihydropyrimidin-2 (1<em>H</em>)-ones <em>via</em> the condensation reaction of the arylaldehydes with β-ketoesters and urea under solvent-free conditions. Due to the dual-functionality of [Py-SO<sub>3</sub>H][HSO<sub>4</sub>] (bearing acidic and basic sites), it was highly effective and general catalyst for the reaction. Additionally, an attractive mechanism for the dual-functionality of the catalyst was proposed. 3 4-Dihydropyrimidin-2 (1H)-one Acidic ionic liquid Dual-functional catalyst Pyridinium-N-sulfonic acid bisulfate (Py-SO3H][HSO4]) Solvent-free 2019 10 01 367 375 https://www.ajnanomat.com/article_85817_44d2543f3181daec75fbb65c3ae744cc.pdf
2019-10-01
Asian Journal of Nanosciences and Materials Asian J. Nanosci. Mater. 2645-775X 2645-775X 2019 2 4 Synthesis, analysis and application of noble metal nanoparticles by Cucurbita pepo using different solvents Prabhpreet Kaur Ratika Komal The synthesis of metal nanoparticles through biological approach is an important aspect of biotechnology. The biological method provides a feasible alternative as compared to chemical and physical methods. The synthesis of metal nanoparticles using plant derived materials is an effective method for the production of metal nanoparticles.This work reports the rapid biosynthesis of silver nanoparticles from plant extract <em>Cucurbita pepo</em>. The plant extract was prepared using two different solvents i.e. double distilled water and 70% ethanol by hot percolation method. The sample was subjected to different reaction conditions i.e. pH (3, 7, 9) and temperature (0 °C, r.t., 37 °C, 60 °C, 100°C). The preliminary characterization of nanoparticles was done by using UV-VIS spectrophotometer at different wavelengths on the basis of color of the sample obtained from different solvents. Confirmatory analysis of the synthesized silver nanoparticles were done by energy dispersion X-ray spectrometer (EDS) and transmission electron microscopy (TEM). These biosynthesized silver nanoparticles were used in the evaluation of antimicrobial activity that was done by Minimum Inhibitory concentration method against different pathogenic strains. The detection, analysis of presence of metal ions in the synthesized silver nanoparticles by using UV-VIS spectrophotometer at 630 nm. Transvermillion Silver nanoparticles Cucurbita pepo UV-VIS spectrophotometer Energy dispersion X-Ray Spectrometer (EDS) Transmission Electron Microscopy (TEM) Antimicrobial activity 2019 10 01 376 398 https://www.ajnanomat.com/article_85827_7ec3a72a93c4d73d422c15db1371196f.pdf
2019-10-01
Asian Journal of Nanosciences and Materials Asian J. Nanosci. Mater. 2645-775X 2645-775X 2019 2 4 A DFT, NBO, RDG, MEP and thermodynamic sudy of acrolein interaction with pristine and Ga‒doped boron phosphide nanotube Mahdi Rezaei Sameti In this research, the interaction of the acrolein (Acr) molecule with the pristine and Ga‒doped boron phosphide nanotube<strong> (</strong>BPNTs) was investigated using the density functional theory (DFT). The electrical, quantum, thermodynamic properties, natural bond orbital (NBO), reduced density gradient (RDG), atom in molecule (AIM), and molecular electrostatic potential (MEP) for all studied models were calculated and analyzed. The results revealed that the thermodynamic parameters (∆H and ∆G) values for all studied models were negative and favorable in thermodynamic point of view. By doping the Ga atom and adsorbing Acr molecule, the HOMO, LUMO, gap energy, conductivity, and optical properties of the nanotube altered slightly from the original values. Whereas, the global hardness and chemical potential of the Ga-doped increased slightly from pristine state and the activity of system decreased slightly from the original state. In addition, the AIM parameters and RDG results showed that the covalent bonding interaction between Acr and BPNTs was so strong. Acrolein BPNTs Ga doped DFT MEP 2019 10 01 399 412 https://www.ajnanomat.com/article_85846_acd85ff4bce9a719e66fcd1d0f320164.pdf
2019-10-01
Asian Journal of Nanosciences and Materials Asian J. Nanosci. Mater. 2645-775X 2645-775X 2019 2 4 Highly effectual synthesis of 4H-pyrano [2, 3-c] pyrazoles using N1, N1, N2, N2-tetramethyl-N1, N2-bis (sulfo) ethane-1, 2-diaminium trifluoroacetate as a dual-functional catalyst Mostafa Karami Maryam Maghsoudi Maria Merajoddin Abdolkarim Zare In this research study, highly effective preparation of 4<em>H</em>-pyrano[2, 3-<em>c</em>]pyrazoles was discussed. The one-pot multi-component reaction between the malononitrile, arylaldehydes and 3-methyl-1-phenyl-1<em>H</em>-pyrazol-5 (4<em>H</em>)-one using protic acidic ionic liquid <em>N</em><sup>1</sup>,<em> N</em><sup>1</sup>, <em>N</em><sup>2</sup>,<em> N</em><sup>2</sup>-tetramethyl-<em>N</em><sup>1</sup>,<em> N</em><sup>2</sup>-bis (sulfo) ethane-1, 2-diaminium trifluoroacetate ([TMBSED][TFA]<sub>2</sub>) under the mild and solvent-free conditions have furnished the title compounds with high yields in short times. Additionally, an attractive mechanism considering dual-functionality of the catalyst was proposed ([TMBSED][TFA]<sub>2</sub> with acidic and basic sites). 4H-pyrano[2 3-c]pyrazole Protic acidic ionic liquid N1 N1 N2 N2-tetramethyl-N1 N2-bis (sulfo) ethane-1 2-diaminium trifluoroacetate ([TMBSED][TFA]2) Arylaldehyde 3-methyl-1-phenyl-1H-pyrazol-5 (4H)-one 2019 10 01 413 420 https://www.ajnanomat.com/article_85847_9e61c239228de1fb2a2a9ddac09ad592.pdf
2019-10-01
Asian Journal of Nanosciences and Materials Asian J. Nanosci. Mater. 2645-775X 2645-775X 2019 2 4 Comparison of TiO2 nanoparticles impact with TiO2/CNTs nano hybrid on microbial community of staphylococcus Ghazaleh Allaedini Siti Masrinda Tasirin There has been an increase in carbon nanotubes (CNT) uses in different industries; however, its impact on the environment is still under a vast consideration and investigation. In this research study, the soil with staphylococcus has been exposed to pure TiO<sub>2</sub> and TiO<sub>2</sub>/CNT. Also, the community of the staphylococcus was studied using the scanning electron microscopy (SEM). It has been observed that, the microbial community has decreased tremendously after the titanium oxide was doped with CNT. This study suggests that, the TiO<sub>2</sub>/CNTs can be a much more effective potential material for altering the microbial community compared with the TiO<sub>2</sub>. These findings could be useful for creating antibacterial agents for the soil using TiO<sub>2</sub>/CNTs nano hubrid .Further investigation of the TiO<sub>2</sub>/CNTs mechanism could prove useful for industrial uses or altering microbial communities. TiO2 TiO2/CNTs microbial community effect of CNT Staphylococcus 2019 10 01 421 424 https://www.ajnanomat.com/article_86077_f488a4f804d7d81b952784713ac4c3fe.pdf
2019-10-01
Asian Journal of Nanosciences and Materials Asian J. Nanosci. Mater. 2645-775X 2645-775X 2019 2 4 Antibacterial activity of magnesium oxide nanostructures prepared by hydrothermal method Shah Rukh Ashaq Hussain Sofi Mohammad Ashraf Shah Shayista Yousuf In this research study, the magnesium oxide nanoparticles were synthesized using an inexpensive and simple hydrothermal method. A pure magnesium metal powder, de-ionized water, and hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) was utilized as the starting materials. The synthesized MgO was dense, uniformly distributed with a relatively spherical shape, without any cracks and voids as confirmed by the scaning electron microscopy (SEM) analysis. The structure was crystalline with a high purity. No other peak corresponding to any other material or metal could be ascertained from powder X-ray diffraction (XRD) pattern. The crystallite size of the prepared samples was found to be nearly 18 nm which was favorable for antibacterial activity. The antibacterial activity of MgO nanostructures was carried out by using disc diffusion method. The inhibition zones of diameters = 1 mm were observed in case of <em>salmonella</em> and <em>Staphylococcus aureus</em>, however, in case of <em>E. Coli</em> inhibition zones of diameter = 2 mm was obtained. Hydrothermal method Disc diffusion method Antimicrobial activity 2019 10 01 425 430 https://www.ajnanomat.com/article_88468_edb9c5aece9bd6e985c2355b3cba822b.pdf
2019-10-01
Asian Journal of Nanosciences and Materials Asian J. Nanosci. Mater. 2645-775X 2645-775X 2019 2 4 Comparative investigations of synthesis TiO2 Nano-Particles from four different types of alcohols by Sol-Gel method and evaluation of their antibacterial activity Mariam Farag Ambaraka Fawzia Muftah Aljazwia Randa Fawzi Alsupikhe TiO<sub>2</sub> nanoparticles were synthesized using a simple reaction of TiCl<sub>4</sub> with different types of primary and secondary alcohols. Four different alcohols (ethanol, isopropyl, isobutyl, and isobentyl alcohol) were investigated. The experiments were carried out to compare the products of the reactions with different precursors. The gelatine products were calcined at 400 °C and at 1000 °C in a box furnace and the effect of calcination temperature on the feature of nano-particles was studied. The synthesized TiO<sub>2</sub> nanoparticles were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results revealed that the average particle size was 8.9-18.4 nm. The antibacterial result of titanium dioxide nanoparticles at four types of bacteria was two gram-positive (Staphylococcus aureus and Streptococcus sp.) and two gram-negative (Escherichia coli and Klebsiella sp.). Also, nanoparticles titanium dioxide did not have any effect on these types of bacteria. The sol-gel method could be used for applications that involve nano-crystalline TiO<sub>2</sub> with anatase phase with low cost and simple preparation. TiO2 nanoparticles Synthesis Sol-gel method alchols Antibacterial study 2019 10 01 431 438 https://www.ajnanomat.com/article_89679_117fd3139c8c8798c22e23084b908547.pdf
2019-10-01
Asian Journal of Nanosciences and Materials Asian J. Nanosci. Mater. 2645-775X 2645-775X 2019 2 4 A computational study of thermophysical, HOMO, LUMO, vibrational spectrum and UV-visible spectrum of cannabicyclol (CBL), and cannabigerol (CBG) using DFT Md Nuruzzaman Sarker Ajoy Kumer Mohammad Jahidul Islam Sunanda Paul Cannabicyclol, also called CBL, is one of the least known and studied isomer of cannabinoids in the cannabis plant, and it is the precursor of the different cannabinoids found in marijuana plant having with widespread medicinal use. In this work, the thermophysical properties of CBL such as, free energy, entropy, dipole moment, binding energy, nuclear energy, electronics energy, and heat of formation were estimated using density functional theory for developing use as pharmaceutical pursues. In addition, the chemical reactivity properties including highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO), HOMO-LUMO gap, ionization potential, electronegativity, hardness, softness, and electron affinity were evaluated. It was found that, the magnitude of HOMO was -8.98 and -8.53, LUMO was 0.19, -0.31 and HOMO –LUMO gap was -9.17 and -8.22 eV of CBL and CBG, respectively. The vibrational spectrum and electronics spectrum were simulated for identification and characterization. These studies provided a proper and predictable data for further use in any chemical and pharmaceutical purpose. Cannabis HOMO LUMO DFT vibrational spectrum and electronics spectrum 2019 10 01 439 447 https://www.ajnanomat.com/article_91528_291a0246c82ffb71925208b2effa65f9.pdf