Organic Nanosynthesis of Ancient Windmill-like Window Gridarenes at Molecular Scale

2018 ◽  
Author(s):  
Ying Wei ◽  
Quanyou Feng ◽  
Hui Liu ◽  
Xiuling Wang ◽  
Dongqing Lin ◽  
...  
Keyword(s):  
Main Product ◽  
Synthesis Method ◽  
Synthetic Method ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
H Nmr ◽  
Cyclization Process ◽  
Molecular Scale ◽  
Insight Into

We focus on another kind of square-type unit nanogrids with starlike divergent extensibility. As a result, square windmill-like nanogrid <b>WG4</b> have been successfully synthesized by two different kinds of fluorene-based nanosynthons, namely I-shape nanosynthon and L-shape nanosynthon synthesis method. Besides <b>WG4</b>, triangle and hexagon windmill-like nanogrids (<b>WG3</b> and <b>WG5</b>) are also obtained via one-pot nanosynthesis of I-shape nanosynthon with <b>WG3</b> as the main product. For the L-shape nanosynthon synthetic method, the cyclization process possesses higher selectivity, resulting to an excellent yield for <b>WG</b>4. In addition, two stereoisomers of the triangle nanogrids, <i>cis-trans</i>-<b>WG3</b> and <i>cis-cis-</i><b>WG3</b>, were separated and characterized from the single-crystal X-ray diffraction and <sup>1</sup>H NMR analyses for getting insight into the configuration of the triangle nanogrids with the skeleton planarization for the <i>trans</i>-configuration and deplanarization for the <i>cis</i>-configuration.

Organic Nanosynthesis of Ancient Windmill-like Window Gridarenes at Molecular Scale

2018 ◽  
Author(s):  
Ying Wei ◽  
Quanyou Feng ◽  
Hui Liu ◽  
Xiuling Wang ◽  
Dongqing Lin ◽  
...  
Keyword(s):  
Main Product ◽  
Synthesis Method ◽  
Synthetic Method ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
H Nmr ◽  
Cyclization Process ◽  
Molecular Scale ◽  
Insight Into

We focus on another kind of square-type unit nanogrids with starlike divergent extensibility. As a result, square windmill-like nanogrid <b>WG4</b> have been successfully synthesized by two different kinds of fluorene-based nanosynthons, namely I-shape nanosynthon and L-shape nanosynthon synthesis method. Besides <b>WG4</b>, triangle and hexagon windmill-like nanogrids (<b>WG3</b> and <b>WG5</b>) are also obtained via one-pot nanosynthesis of I-shape nanosynthon with <b>WG3</b> as the main product. For the L-shape nanosynthon synthetic method, the cyclization process possesses higher selectivity, resulting to an excellent yield for <b>WG</b>4. In addition, two stereoisomers of the triangle nanogrids, <i>cis-trans</i>-<b>WG3</b> and <i>cis-cis-</i><b>WG3</b>, were separated and characterized from the single-crystal X-ray diffraction and <sup>1</sup>H NMR analyses for getting insight into the configuration of the triangle nanogrids with the skeleton planarization for the <i>trans</i>-configuration and deplanarization for the <i>cis</i>-configuration.

Interfacial Synthesis of SiO2 Doped by Polyaniline and its Electrorheological Behavior

2011 ◽  
Vol 179-180 ◽  
pp. 249-252
Author(s):  
Qing Ming Jia ◽  
Shao Yun Shan ◽  
Li Hong Jiang ◽  
Ya Ming Wang
Keyword(s):  
Silicone Oil ◽  
Synthesis Method ◽  
Tetraethyl Orthosilicate ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
One Pot ◽  
X Ray ◽  
Sem Image ◽  
Interfacial Synthesis ◽  
Er Fluid

SiO2 doped by polyaniline for application in electrorheological (ER) fluid was prepared by using a simple one-pot interfacial synthesis method. Scanning electron microscopy (SEM) image shows that the morphologies of SiO2 may be changed from spherical to fibroid structure by changing the molar ratio of tetraethyl orthosilicate(TEOS) and aniline. X-ray diffraction (XRD) proves that polyaniline does not change the crystallinity of SiO2. The ER behaviors of SiO2 doped by polyaniline in silicone oil are investigated with different doping degrees under different shear rate, and the results show that properly doping polyaniline improves electrorheological behavior of SiO2.

Considerations about the Dependence of PEGylated ZnS Nanoparticles Properties on the Synthesis Method

2017 ◽  
Vol 232 (1) ◽  
Author(s):  
Anca Dumbrava ◽  
Daniela Berger ◽  
Gabriel Prodan ◽  
Florin Moscalu ◽  
Aurel Diacon
Keyword(s):  
Aqueous Medium ◽  
Quantum Confinement Effect ◽  
Synthesis Method ◽  
Chemical Precipitation ◽  
Band Gap Energy ◽  
X Ray Diffraction ◽  
Zns Nanoparticles ◽  
One Pot ◽  
X Ray ◽  
Dimension Of Particles

AbstractWe studied the dependence between properties and synthesis method for PEGylated ZnS nanoparticles. Thus, we proposed the PEGylation of ZnS nanopowder, in non-aqueous medium, by a facile one-pot synthesis in very mild conditions, as an alternative for the chemical precipitation of PEGylated ZnS in an aqueous solution, and we compared the properties of zinc sulfide obtained by both methods. The structure and morphology of PEGylated ZnS nanopowders were investigated by X-ray diffraction and transmission electron microscopy, and the FTIR spectra confirmed the PEGylation of ZnS nanoparticles. The values for band gap energy are in good accordance with the quantum confinement effect for nanocrystals. The mean dimension of particles was calculated, on the basis of UV–Vis spectra, by using the Brus equation and it is in good agreement with the crystallites size, determined from X-ray diffraction. The photocatalytic properties of synthesized nanopowders were tested in the degradation of Congo red azo dye, demonstrating a faster bleaching of dye in the presence of PEGylated ZnS prepared in non-aqueous medium. The photoluminescence properties are also dependent on the synthesis method and can be correlated with the surface modifications by PEG.

One-pot synthesis of Ag@silicalite-1 with different silver amine complexes and the performance for styrene oxidation

2021 ◽  
Author(s):  
Hongdan Zhang ◽  
Zhiwei Wang ◽  
Weidu Wang ◽  
Chunyang Wu ◽  
Tingting Lu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis Method ◽  
Complex Mixtures ◽  
X Ray Diffraction ◽  
Styrene Oxidation ◽  
One Pot ◽  
X Ray ◽  
Amine Complexes ◽  
One Pot Synthesis ◽  
Amine Complex

A facile one-pot strategy was used to successfully synthesize Ag@silicalite-1 using different silver amine complex mixtures as precursors via a hydrothermal synthesis method. Ag@silicalite-1 was characterized by X-ray diffraction (XRD),...

1-n-Propyl- and 1-n-butyl-3-hydroxy-2-methyl-4-pyridinone complexes of group 13 (IIIA) metal ions

1991 ◽  
Vol 69 (5) ◽  
pp. 893-900 ◽  
Author(s):  
Linda Simpson ◽  
Steven J. Rettig ◽  
James Trotter ◽  
Chris Orvig
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Key Words ◽  
Elemental Analysis ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
One Pot ◽  
Group 13 ◽  
X Ray ◽  
H Nmr

The aluminum, gallium, and indium tris(ligand) complexes of 3-hydroxy-2-methyl-1-n-propyl-4-pyridinone and 1-n-butyl-3-hydroxy-2-methyl-4-pyridinone have been prepared and characterized. All six compounds were prepared in a one-pot synthesis from maltol, n-propyl-, or n-butylamine and an appropriate metal(III) salt, and were completely characterized (IR, FAB-MS, 1H NMR, 27Al NMR, elemental analysis). Three of the six complexes were studied by single-crystal X-ray diffraction and were found to form trihydrates, unlike their 1-methyl and 1-ethyl analogues, which formed dodecahydrates. The n-butylpyridinone complex Al(C10H14NO2)3•3H2O (Al(nbp)3•3H2O) and n-propylpyridinone complexes Al(C9H12NO2)3•3H2O (Al(npp)3•3H2O), and Ga(C9H12NO2)3•3H2O (Ga(npp)3•3H2O) were essentially isostructural, crystallizing in the space group [Formula: see text] with the following crystal parameters for Al(nbp)3•3H2O (Al(npp)3•3H2O, Ga(npp)3•3H2O): a = 15.885(1) (15.328(1), 15.367(2)) Å, c = 7.280(8) (7.231(2), 7.256(2)) Å, Z = 2. the data were refined by using 1280 (1377, 1802) reflections with I > 3σ(I) to R andRw values of 0.047 (0.057, 0.055) and 0.061 (0.077, 0.081), respectively. They form fac geometries with infinite chains of hydrogen bonds parallel to the c axis similar to those found in the 1-methyl and 1-ethyl complexes. They lack the hexagonal channels of water molecules which characterized the dodecahydrates and are therefore not exoclathrates. Key words: metal complexes, hydroxypyridinone ligands, exoclathrate, hydrogen bonding, crystal structures.

scholarly journals EFFECT OF OXYGEN ON SIZE-CONTROLLED SYNTHESIS OF CdSe QDs

2014 ◽  
Vol 9 (2) ◽  
Author(s):  
Charles Ahamefula Ubani ◽  
Mohamad Yusof Sulaiman ◽  
Ibarahim Zahari ◽  
Kamarruzaman Sopian ◽  
Noor bayaa Ibrahim ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Atmospheric Oxygen ◽  
Synthesis Method ◽  
Optical Absorption Spectroscopy ◽  
X Ray Diffraction ◽  
Cdse Qds ◽  
One Pot ◽  
Withdrawal Time ◽  
X Ray ◽  
Effect Of Oxygen

Unique properties of quantum dots (QDs) are controlled by their customizable particle sizes which can be engineered to suit local need. One-pot organometallic injection synthesis of cadmium selenide (CdSe) QDs is reported. The operation started with the injection of a week old selenium (Se) precursor into a boiling non-coordinating octadecene (ODE) at 195oC resulting in the formation of monodispersed size tunable CdSe QDs with discrete homogeneous nucleation. Differences in the injection and withdrawal time of the sample resulted to the dissimilarity in the shape, size and the opto-electronic properties of the QDs. The effect of oxygen on the synthesized CdSe QDs was studied by exposing freshly prepared sample to atmospheric oxygen for 206 days. The samples were characterized using optical absorption spectroscopy (UV-vis), optical photoluminescence (PL), X-ray diffraction (XRD), atomic force microscopy (AFM) and transmission electron microscopy (TEM), electron dispersive X-ray (EDX) X-ray diffraction spectroscopy (XRD), and X-ray photoelectron spectroscopy (XPS). Noticeable deformation on the size, shape and the crystalline orientation of the CdSe QDs were observed on the oxygen-interacted sample.Although the synthesis method is safe and produced good quality CdSe QDs, the interaction of the sample with oxygen degrades their opto-electronic quality.

Preparation, properties and structure of some intermediate nido- and arachno-monocarbaboranes

1981 ◽  
Vol 46 (10) ◽  
pp. 2345-2353 ◽  
Author(s):  
Karel Baše ◽  
Bohumil Štíbr ◽  
Jiří Dolanský ◽  
Josef Duben
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Nmr Spectra ◽  
Liquid Ammonia ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr ◽  
Starting Compound

The 6-N(CH3)3-6-CB9H11 carbaborane reacts with sodium in liquid ammonia with the formation of 6-CB9H12- which was used as a starting compound for preparing the 4-CB8H14, 9-L-6-CB9H13 (L = (CH3)2S, CH3CN and P(C6H5)3), 1-(η5-C5H5)-1,2-FeCB9H10-, and 2,3-(η5-C5H5)2-2,31-Co2CB9H10- carboranes. The 4-CB8H14 compound was dehydrogenated at 623 K to give 4-(7)-CB8H12 carborane. Base degradation of 6-N(CH3)3-6-CB9H11 in methanol resulted in the formation of 3,4-μ-N(CH3)3CH-B5H10. The structure of all compounds was proposed on the basis of their 11B and 1H NMR spectra and X-ray diffraction was used in the case of the transition metal complexes.

scholarly journals Efficient Adsorption of Methylene Blue by Porous Biochar Derived from Soybean Dreg Using a One-Pot Synthesis Method

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 661
Author(s):  
Zhiwei Ying ◽  
Xinwei Chen ◽  
He Li ◽  
Xinqi Liu ◽  
Chi Zhang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Methylene Blue ◽  
Photoelectron Spectroscopy ◽  
Synthesis Method ◽  
Urban Pollution ◽  
Maximum Adsorption Capacity ◽  
One Pot ◽  
Average Pore ◽  
X Ray ◽  
Isotherm Equation

Soybean dreg is a by-product of soybean products production, with a large consumption in China. Low utilization value leads to random discarding, which is one of the important sources of urban pollution. In this work, porous biochar was synthesized using a one-pot method and potassium bicarbonate (KHCO3) with low-cost soybean dreg (SD) powder as the carbon precursor to investigating the adsorption of methylene blue (MB). The prepared samples were characterized with scanning electron microscopy (SEM), transmission electron microscopy (TEM), elemental analyzer (EA), Brunauer-Emmett-Teller (BET), X-ray diffractometer (XRD), Raman spectroscopy (Raman), Fourier transform infrared spectrometer (FTIR), and X-ray photoelectron spectroscopy (XPS). The obtained SDB-K-3 showed a high specific surface area of 1620 m2 g−1, a large pore volume of 0.7509 cm3 g−1, and an average pore diameter of 1.859 nm. The results indicated that the maximum adsorption capacity of SDB-K-3 to MB could reach 1273.51 mg g−1 at 318 K. The kinetic data were most consistent with the pseudo-second-order model and the adsorption behavior was more suitable for the Langmuir isotherm equation. This study demonstrated that the porous biochar adsorbent can be prepared from soybean dreg by high value utilization, and it could hold significant potential for dye wastewater treatment in the future.

scholarly journals Tautomerisation in 1-(4-Methylphenylazo)naphthalen-2-ol and 2-(4-Methylphenylazo)-4-methylphenol: A Crystallographic and 13C{1H}NMR Study

1999 ◽  
Vol 23 (3) ◽  
pp. 178-179
Author(s):  
Wendy I. Cross ◽  
Kevin R. Flower ◽  
Robin G. Pritchard
Keyword(s):  
Acetic Acid ◽  
Nmr Spectroscopy ◽  
Resonant Frequency ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr ◽  
Nmr Study ◽  
Acetic Acid Esters ◽  
Acid Esters ◽  
Equivalent Carbon

The acetic acid esters of 1-(4-methylphenylazo)naphthalen-2-ol 1 and 2-(4-methylphenylazo)-4-methylphenol 3 are prepared and characterised by single crystal X-ray diffraction studies and 13C{1H}NMR spectroscopy; the position of the C(2)13C resonance for the ester is used to predict the position of resonant frequency of the equivalent carbon in the parent alcohols and hence, calculate the position of the azo-hydrazone equilibrium in these compounds.

scholarly journals Green synthesis and characterization of hexaferrite strontium-perovskite strontium photocatalyst nanocomposites

2020 ◽  
Vol 43 (1) ◽  
pp. 26-42 ◽  
Author(s):  
Zahra Hajian Karahroudi ◽  
Kambiz Hedayati ◽  
Mojtaba Goodarzi
Keyword(s):  
Magnetic Properties ◽  
Green Synthesis ◽  
Sol Gel ◽  
Synthesis Method ◽  
Combustion Method ◽  
Lemon Juice ◽  
X Ray Diffraction ◽  
X Ray ◽  
Auto Combustion

AbstractThis study presents a preparation of SrFe12O19– SrTiO3 nanocomposite synthesis via the green auto-combustion method. At first, SrFe12O19 nanoparticles were synthesized as a core and then, SrTiO3 nanoparticles were prepared as a shell for it to manufacture SrFe12O19–SrTiO3 nanocomposite. A novel sol-gel auto-combustion green synthesis method has been used with lemon juice as a capping agent. The prepared SrFe12O19–SrTiO3 nanocomposites were characterized by using several techniques to characterize their structural, morphological and magnetic properties. The crystal structures of the nanocomposite were investigated via X-ray diffraction (XRD). The morphology of SrFe12O19– SrTiO3 nanocomposite was studied by using a scanning electron microscope (SEM). The elemental composition of the materials was analyzed by an energy-dispersive X-ray (EDX). Magnetic properties and hysteresis loop of nanopowder were characterized via vibrating sample magnetometer (VSM) in the room temperature. Fourier transform infrared spectroscopy (FTIR) spectra of the samples showed the molecular bands of nanoparticles. Also, the photocatalytic behavior of nanocomposites has been checked by the degradation of azo dyes under irradiation of ultraviolet light.

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