scholarly journals High Efficiency Electrochemiluminescence for Copper(II) and Cadmium(II) Pyrazolate Polymers

2021 ◽  
Author(s):  
Feng-Zhen Hua ◽  
Chao Feng ◽  
Wei-Nan Xie ◽  
Yi-Ni Luo ◽  
Ling-Mei Zhang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Solvothermal Method ◽  
Hirshfeld Surface ◽  
X Ray Diffraction ◽  
Metal Centers ◽  
X Ray ◽  
Weak Intermolecular Interactions ◽  
1D Chain ◽  
Ft Ir ◽  
Supramolecular Networks

Abstract Two new coordination polymers, namely, [Cu2(L)2(4,4′-bpy)]n (1) and [Cd(HL)Cl(1,10′-phen)]n (2) (H2L = 1H-pyrazole-3-carboxylic acid, 4,4′-bpy = 4,4′-bipyridine, 1,10′-phen = 1,10-phenanthroline) have been synthesized via solvothermal method and were structurally characterized by single-crystal X-ray diffraction, FT-IR, elemental analysis and PXRD. The two complexes are both infinite 1D chain structures, in complex 1 the H2L ligands are completely deprotonated and chelating the metal centers, while in complex 2, H2L ligands play a role in chelating-bridging the metal centers. What’s more, the two complexes further extended to 3D supramolecular networks by hydrogen bonds and weak C–H⋯π interactions. The weak intermolecular interactions existed in the complexes structures were further studied by Hirshfeld surface analysis and 2D fingerprint plots. In addition, these two transition mental complexes exhibit high intense electrochemiluminescence (ECL) in N,N-dimethylformamide (DMF) and after ten circulations the ECL intensity still remains stable, which can be a useful guide for the construct of new polymers ECL materials.

scholarly journals 3-Bromopyridine-Heterogenized Phosphotungstic Acid for Efficient Trimerization of Biomass-Derived 5-Hydroxymethylfurfural with 2-Methylfuran to C21 Fuel Precursor

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Yufei Xu ◽  
Zhaozhuo Yu ◽  
Hu Li ◽  
Song Yang
Keyword(s):  
Phosphotungstic Acid ◽  
Solvothermal Method ◽  
Reaction Pathway ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
X Ray ◽  
Acidic Catalyst ◽  
Carbon Compounds ◽  
Ft Ir ◽  
Long Chain

The production of long-chain carbon compounds (C9-C21) from biomass derivatives to alternate traditional fossil diesel is sustainable, eco-friendly, and potentially economic for modern industry. In this work, phosphotungstic acid heterogenized by 3-bromopyridine was achieved using a solvothermal method, which was demonstrated to be efficient for trimerization of biomass-derived 5-hydroxymethylfurfural (HMF) with 2-methylfuran (2-MF) to C21 fuel precursor (57.1% yield) under mild reaction conditions. The heterogeneous acidic catalyst could be reused for four consecutive cycles without obvious loss of activity, and different characterization techniques (e.g., XRD (X-ray diffraction), TG (thermogravimetric analysis), SEM (scanning electron microscope), FT-IR (Fourier transform infrared spectroscopy), and BET (Brunauer-Emmet-Teller)) were utilized to investigate the performance of the catalyst. In addition, a plausible reaction pathway was postulated, on the basis of results obtained by NMR (nuclear magnetic resonance) and GC-MS (gas chromatography-mass spectrometer). This strategy provides a facile and efficient approach to prepare a recyclable acidic catalyst for the production of diesel fuel precursor from biomass via controllable polymerization.

Syntheses and Characterizations of Cobalt Doped Mesoporous Alumina Templated by Rubber Latex and its Adsorption of Acetaldehyde

2013 ◽  
Vol 742 ◽  
pp. 346-350
Author(s):  
Wei Zhe ◽  
Bao Kun Zhu ◽  
Tou Gen Liao ◽  
Zhi Qiang Li ◽  
Hai Yan Yang ◽  
...  
Keyword(s):  
Fourier Transform ◽  
High Efficiency ◽  
Gaseous Mixture ◽  
Aluminium Oxide ◽  
Mesoporous Alumina ◽  
X Ray Diffraction ◽  
Rubber Latex ◽  
X Ray ◽  
Ft Ir ◽  
Adsorption Desorption

Mesoporous cobalt doped aluminium oxide (Co/MAl2O3/RL) was synthesized using rubber latex as biotemplate by hydrothermal method. The synthesized mesoporous aluminium oxide samples were characterized by a combination of various physicochemical techniques, such as X-ray diffraction (XRD), N2adsorption/desorption and Fourier transform infrared (FT-IR). Espciallly, Co/MAl2O3/RL exhibited a high efficiency of acetaldehyde adsorption from mixed gaseous mixture.

Preparation and Optical Properties of CuS Nanochains by a Solvothermal Method

2013 ◽  
Vol 634-638 ◽  
pp. 2218-2221
Author(s):  
Xiu Hui Zhu ◽  
Jian Zhen Liu ◽  
Tian Ai ◽  
Hong Mei Yu
Keyword(s):  
Optical Properties ◽  
Solvothermal Method ◽  
Hydrothermal Reaction ◽  
Hexagonal Phase ◽  
X Ray Diffraction ◽  
Structure Directing Agent ◽  
X Ray ◽  
Transmission Electron ◽  
Ft Ir ◽  
Size And Morphology

CuS nanochains were prepared via a simple hydrothermal reaction at 140 °C for 12 h, employing Cu(Ac)2•H2O and Thiourea as reactants in the absence of any structure-directing agent. The size and morphology of CuS nanochains were characterized by means of X-ray diffraction (XRD) and Transmission electron microscope (TEM); the optical properties of CuS nanochains were investigated by UV–vis absorption spectrum and Fourier transform infrared (FT-IR) measurements. CuS nanochains were found to be constructed by covellite CuS with a hexagonal phase and composed of nanorods with 40-100 nm length and 25 nm Width. The UV–vis absorption of CuS was observed an increased absorption from 300nm to 650 nm and the band gap of CuS nanochains was 1.91 eV.

Syntheses, supramolecular networks and Hirshfeld surface and thermal analyses of two new cadmium chloride coordination polymers with an N,O-chelating ligand

2019 ◽  
Vol 75 (2) ◽  
pp. 120-127 ◽  
Author(s):  
Rafika Bouchene ◽  
Sofiane Bouacida
Keyword(s):  
Coordination Polymers ◽  
Noncovalent Interactions ◽  
Thermal Analyses ◽  
Topological Analysis ◽  
Three Dimensional ◽  
Bidentate Ligand ◽  
Hirshfeld Surface ◽  
X Ray Diffraction ◽  
X Ray ◽  
Supramolecular Networks

Two new coordination polymers, namely poly[[(3-aminopyrazin-4-ium-2-carboxylate-κ2 N 1,O)di-μ-chlorido-cadmium(II)] monohydrate], {[CdCl2(C5H5N3O2)]·H2O} n , (1), and poly[2-amino-3-carboxypyrazin-1-ium [(3-aminopyrazine-2-carboxylato-κ2 N 1,O)di-μ-chlorido-cadmium(II)] monohydrate], {(C5H6N3O2)[Cd(C5H4N3O2)Cl2]·H2O} n , (2), have been synthesized from the reaction of cadmium(II) chloride and 3-aminopyrazine-2-carboxylic acid (Hapca) under mild conditions in acidic media. The two coordination polymers have been characterized by single-crystal X-ray diffraction and show chloride-bridged zigzag chains with octahedrally coordinated metal ions, where Hapca acts as a bidentate ligand via the π-conjugated N atom and a carboxylate O atom. The chains are further interconnected via noncovalent interactions into three-dimensional supramolecular networks. The dominant H...O and H...Cl interactions for both compounds were quantified using Hirshfeld surface analysis. The thermal stability and topological analysis of the two-dimensional networks of (1) and (2) are also discussed.

Synthesis and crystal structures of two new lead(II) complexes with the pincer-type ligand 4′-(4-chlorophenyl)-2,2′:6′,2″-terpyridine (Cl-Ph-tpy): subtle interplay of weak intermolecular interactions

2020 ◽  
Vol 75 (12) ◽  
pp. 1043-1048
Author(s):  
Farzin Marandi ◽  
Harald Krautscheid
Keyword(s):  
Nmr Spectroscopy ◽  
Single Crystal ◽  
Elemental Analysis ◽  
Central Unit ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr ◽  
Weak Intermolecular Interactions ◽  
Binuclear Structure ◽  
Ft Ir

AbstractA dinuclear and a tetranuclear complex of lead(II) with the pincer-type ligand 4′-(4-chlorophenyl)-2,2′:6′,2″-terpyridine (Cl-Ph-tpy), [Pb2(Cl-Ph-tpy)2(μ-I)2I2] (1) and [Pb4(Cl-Ph-tpy)4(μ-Br)4(μ-OH2)Br4]·2CH3OH (2), have been synthesized and characterized by elemental analysis, FT-IR and 1H NMR spectroscopy, and by single-crystal X-ray diffraction. In the binuclear structure of 1, the Pb atom has a hemidirected PbN3I3 environment with a Pb(μ-I)2Pb central unit. In the tetranuclear structure of 2, two crystallographically independent Pb(II) centres having hemidirected PbN3Br3 and PbN3OBr2 environments are connected to Pb(μ-Br)Pb(μ-Br)2(μ-OH2)Pb(μ-Br)Pb chains. The supramolecular features in 1 and 2 are supported through weak but directional C–H···Cl, C–H···I and C–H···Br, C–H···O, O–H···Br, and O···Br interactions and aromatic π-π stacking.

scholarly journals (E,E)-3-Methyl-2,5-bis(4-methylbenzylidene)cyclopentanone: synthesis, characterization, Hirshfeld surface analysis and antibacterial activity

2019 ◽  
Vol 75 (4) ◽  
pp. 506-511
Author(s):  
Fatiha Mahdi ◽  
Assia Sid ◽  
Rafika Bouchene ◽  
Paul Mosset ◽  
Thierry Roisnel
Keyword(s):  
Surface Analysis ◽  
New Product ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Non Covalent Interactions ◽  
Covalent Interactions ◽  
Ir And Raman

The title compound, (E,E)-3-methyl-2,5-bis(4-methylbenzylidene)cyclopentanone (MBMCP), C22H22O, was obtained by Claisen–Schmidt condensation of 4-methylbenzaldehyde with 3-methylcyclopentanone in good yield. The structure of MBMCP was studied using UV, FT–IR and Raman spectroscopy, single-crystal X-ray diffraction (XRD) measurements, and 1H and 13C nuclear magnetic resonance (NMR) spectroscopy. The molecular structure of MBMCP is fully extended in the E,E configuration. C—H...π stacking interactions play a significant role in the stabilization of the molecular packing. Hirshfeld surface analysis was used to quantify the non-covalent interactions in the crystal lattice. Microbiological studies were performed to investigate the antimicrobial activity of this new product.

Two hydrazones derived from 1-aryl-3-(p-substituted phenyl)prop-2-en-1-one: synthesis, crystal structure, Hirshfeld surface analysis andin vitrobiological properties

2018 ◽  
Vol 74 (6) ◽  
pp. 703-714 ◽  
Author(s):  
Ouafa Dammene Debbih ◽  
Assia Sid ◽  
Rafika Bouchene ◽  
Sofiane Bouacida ◽  
Wissam Mazouz ◽  
...  
Keyword(s):  
Single Crystal ◽  
Surface Analysis ◽  
Antioxidant Activities ◽  
Hirshfeld Surface ◽  
Hirshfeld Surface Analysis ◽  
Significant Activity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Scavenging Efficiency

Two chalcones were synthesized by the aldolic condensation of enolizable aromatic ketones with substituted benzaldehydes under Claisen–Schmidt reaction conditions and then treated with 2,4-dinitrophenylhydrazine to yield their corresponding hydrazones. The two (E,Z)-2,4-dinitrophenylhydrazone structures, namely (Z)-1-(2,4-dinitrophenyl)-2-[(E)-3-(4-methylphenyl)-1-phenylallylidene]hydrazine, C22H18N4O4, (H1), and (Z)-1-[(E)-3-(4-chlorophenyl)-1-(naphthalen-1-yl)allylidene]-2-(2,4-dinitrophenyl)hydrazine, C25H17ClN4O4, (H2), were isolated by recrystallization and characterized by FT–IR, UV–Vis, single-crystal and powder X-ray diffraction methods. The UV–Vis spectra of the hydrazones have been studied in two organic solvents of different polarity. It was found that (H2) has a molar extinction coefficient larger than 40000. Single-crystal X-ray diffraction analysis reveals that the molecular zigzag chains of (H1) and (H2) are interconnected through noncovalent contacts. A quantitative analysis of the intermolecular interactions in the crystal structures has been performed using Hirshfeld surface analysis. All the synthesized chalcones and hydrazones were evaluated for their antibacterial and antioxidant activities. Results indicate that the studied compounds show significant activity against Gram negativeEscherichia colistrain and the chalcone 3-(4-methylphenyl)-1-phenylprop-2-en-1-one, (C1), was the most effective. In addition, only hydrazone (H1) displayed a moderate DPPH (2,2-diphenyl-1-picryl hydrazyl) scavenging efficiency.

Shape Controllable Preparation of PbS Crystal by a Simple Solvothermal Method

2013 ◽  
Vol 820 ◽  
pp. 11-14
Author(s):  
Zhong Biao Zhao ◽  
Peng Wang ◽  
Li Bo Fan ◽  
Zi Fa Chen ◽  
Chun Meng Wang
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Lead Sulfide ◽  
Solvothermal Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Controllable Preparation ◽  
Scanning Electron

Hierarchical eight-arm, star-shaped lead sulfide (PbS) crystals have been successfully synthesized by a simple hydrothermal method. When pyridine was used as solvent, candy-like PbS crystal was obtained. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform-infrared (FT-IR) measurements.

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