Reaction Of Zinc Acetate Research Articles

Synthesis of AgNPs and ZnONPs using tea leaves extract and their utilization to improve dyeability, printability and functionality of cotton and wool fabrics

Finishing is to make textiles more appealing to consumers by attaining a number of objectives like as functionalization, increased quality, and improved performance. Polymers are increasingly being used instead of simple chemicals to improve multiple useful features in most natural and synthetic fibres, such as absorbency, antibacterial protection, and ultraviolet protection. The use of nanotechnology in textile finishing has helped to improve the quality and performance of textile materials by giving new and more sophisticated capabilities to textile substrates as well as boosting current functionality such as durability, antibacterial, and UV protection (UPF). The proclivity of metal nanoparticles, such as AgNPs and ZnONPs, to interact with microbes has affected desired results in textile materials. Tea leaf extract was used to create AgNPs. ZnONPs were calcined from the powder produced by reacting zinc acetate with tea leaf extract. The fabric is coated with polycation (PC) and metal nanoparticles that have been produced.

Cytotoxic Activity of Zinc Oxide Nanoparticles Mediated by Euphorbia Retusa

Background: Cancer is a dangerous threat that creates extremely high rates of death and morbidity in various regions of the world. Finding suitable therapeutics to improve cancer therapy while avoiding side effects is critical. The most appropriate innovative therapeutics, which combine natural ingredients and nanomaterials, can improve the biological activity of cancer chemotherapeutics. Methods: Phenolic profiling using high-resolution mass spectrometry and the synthesis of zinc oxide nanoparticles was achieved through the reaction of zinc acetate with Euphorbia retusa extract. The characterization of ZnONPs was performed by UV, IR, Zeta potential, XRD, SEM, and TEM. The cytotoxic activity of the ZnONPs was evaluated using a SRB assay against lung, liver, and breast cancer cell lines. Moreover, the mechanism of cytotoxic activity was evaluated in the form of caspase-8 promoters and anti-inflammatory mechanisms using the Western blot method. Results: The high-resolution LC/MS/MS of the E. retusa led to the identification of 22 compounds in the plant for the first time. The Er-ZnONPs had hexagonal shapes, were approximately 100 nm in size, and consisted of aggregated particles of about 10 nm. The E. retusa ZnONPs exhibited cytotoxic activity against HA-549 (IC50 = 22.3 µg/mL), HepG2 (IC50 = 25.6), Huh-7 (IC50 = 25.7), MCF-7 (IC50 = 37.7), and MDA-MB-231 (IC50 = 37). Conclusions: E. retusa are rich in phenolics that are capable of synthesizing ZnONPs, which possess cytotoxic activity, via caspase-8 promotion and anti-inflammatory mechanisms.

A facile strategy for high mechanical performance and recyclable EPDM rubber enabled by exchangeable ion crosslinking

Endowing rubber with excellent recycling ability is of great significance for energy conservation. It is still a huge challenge to obtain high-performance recyclable commercial rubber to satisfy practical applications. Herein, a facile strategy of incorporating exchangeable Zn2+-carboxyl crosslinks into commercial EPDM system was developed through reaction of zinc acetate and EPDM grafted maleic anhydride (EPDM-g-MAH) to obtain EPDM-g-MAZn. The constructed exchangeable crosslinking networks as sacrificial unit significantly enhanced mechanical properties of EPDM, much higher than EPDM cured by covalent bonds (tensile strength: 2.00 MPa and fracture toughness: 6.75 MJ/m3). The dynamic crosslinking was reversibly broken and reformed by hot pressing, endowing EPDM-g-MAZn with good recycling ability. The promising mechanical properties of EPDM-g-MAZn can be tailored by incorporation of carbon black (CB) or zinc dimethacrylate (ZDMA), and recycled EPDM-g-MAZn/CB exhibited good mechanical properties to meet industrial applications. Additionally, multiple crosslinking networks were constructed for EPDM-g-MAZn/ZDMA with fine dispersion of ZDMA due to Zn2+-carboxyl interactions. Such effective strategy exhibits a promising perspective in industrial applications of high-performance recyclable rubber field.

Zinc(II) Complexes of Schiff Bases Derived from Bis-(2-hydrazino-1,3,4-thiadiazole-5- yl)Arene/Alkanes: Synthesis, Spectral Characterization and Biological Properties

A novel series of zinc(II) complexes of type [ZnL(H2O)2], has been synthesized by the reaction of zinc(II) acetate dihydrate with Schiff bases (H2L) derived from bis-(2-hydrazino-1,3,4-thiadiazole-5- yl)arene/alkanes and 2-hydroxynaphthaldehyde/3,5-dichlorosalicyldehyde in presence of a base. The structures of all the zinc complexes were proposed by elemental analysis and spectroscopic data (IR, 1H, 13C NMR). TGA investigations were carried out to confirm the presence of coordinated water molecules in the zinc complexes. The powder crystal structure of one particular zinc complex has been analyzed by XRD diffraction method and SEM studies have been carried out to investigate the surface morphology. The biological studies reveal that the synthesized zinc complexes possess good antimicrobial properties against different species of pathogenic fungi and bacteria.

Studies on the Genesis and Proton Conductivity of Imidazole-Based Linear and Open-Framework Zinc Phosphites.

Three new zinc phosphites, [HIm]2[Zn3(HPO3)4] (1), [Zn2(HPO3)2Im2] (2), and [Zn(HPO3)Im] (3) (Im = imidazole), have been synthesized from the hydro/solvothermal reaction of zinc acetate, dimethyl phosphite, and imidazole by varying the temperature and solvent of the reaction medium. The structure of 1 is built from vertex-sharing of four HPO3-capped Zn3P3 units and adopts an open framework with 12-ring channels stabilized by HIm cations via N-H···O hydrogen bonds. For 2, the inorganic skeleton is comprised of alternating ZnO4 and HPO3 tetrahedra, while the coordinatively associated ZnN2O2 fragments occupy the 12-ring hexagonal channels. Compound 3 adopts a ladder-type one-dimensional structure and exhibits N-H···O hydrogen-bonding interactions to afford a supramolecular assembly. A plausible rationale on the genesis of 1-3 has been put forth by reacting the preformed inorganic zinc phosphites Zn{OP(O)(OMe)H}2 or [Zn2(HPO3)2(H2O)4]·H2O with imidazole as the structure-directing ligand. Alternating-current impedance measurements reveal that 1 and 3 exhibit proton conductivities on the order of 10-3-10-4 S cm-1 between 25 and 100 °C under 35 and 77% relative humidity in repeated impedance cycles (Ea = 0.22-0.35 eV). On the contrary, the conduction property is completely impaired in 2 under similar conditions.

Crystal Packing Studies, Thermal Properties and Hirshfeld Surface Analysis in the Zn(II) Complex of 3-Aminopyridine with Thiocyanate as Co-Ligand

Reaction of zinc acetate, potassium thiocyanate and the ligand 3-ampy gave the discrete tetrahedral complex [Zn(NCS)2(3-ampy)2] in which 3-ampy chelates in a monodentate fashion through its pyridine-N atom. It was characterized by single crystal X-ray diffraction, infrared, and elemental analysis. Density Functional Theory calculations were performed in order to gain insights into the role of weak molecular interactions in the complex that influence the self-assembly process and crystal packing. X---H (X = H, C, N and S) inter-actions. S-H interactions (30.2%) were found to be the main interactions that hold the molecules in the crystal structure. Furthermore, the thermolysis of the complex was studied in order to evaluate whether it was suitable as a precursor for zinc sulphide.

Novel Nanostructured Metal–Organic Framework-Bonded Silica Amine and Polymer: Facile Synthesis, Kinetics, Isotherms, and Thermodynamics Evaluation for Adsorption of Yttrium(III) Ions

Yttrium is a remarkable rare-earth element with multidiscipline applications, and it can be released into an aquatic system for its widespread industrial applications. The present work is devoted to evaluate the kinetics and isotherm models for adsorption of Y(III) ions by the action of a novel metal–organic framework (MOF) chemically bonded polymer with incorporated ion exchange and chelating characters. To assemble these MOFs, a number of synthetic procedures were designed and performed using microwave irradiation heating in only 12 min. (i) The selected MOFs were synthesized by the reaction of zinc acetate and glutaric to produce (ZnGA) in 3 min. (ii) Covalent bonding and coating of (ZnGA) with 3-aminopropyltrimethoxysilane were carried out to produce (ZnGA–Si–NH2) in 3 min. (iii) The polymeric compound was synthesized by coupling of p-chlorocresol with piperazine via formaldehyde to yield PC in 4 min. (iv) The final MOFs–polymer nanocomposite was synthesized by the functionalization of ZnGA–Si–NH2 with PC to assemble ZnGA–Si–NH–PC in 2 min. The impact of the polymer on stability of ZnGA–Si–NH–PC in aqueous solutions (pH 1–7) was confirmed and compared to the MOFs separately. Additionally, thermal stability and surface morphology of ZnGA–Si–NH–PC were also studied and evaluated. The metal sorption capacity values of Y(III) ions onto ZnGA–Si–NH–PC were optimized at pH 7 and established as 1175, 1925, and 4800 μmol g–1 using 0.025, 0.05, and 0.1 mol L–1 of Y(III), respectively. The interaction mechanisms for binding of Y(III) ions with ZnGA–Si–NH–PC were studied and evaluated by seven kinetics models and seven adsorption isotherm models, and the collected results confirmed that the adsorption process is well fitted with the pseudo-second-order and pore diffusion models. The collected data assured that the adsorption of Y(III) ions onto the ZnGA–Si–NH–PC nanocomposite is chemisorption (ΔH° = 42.44 kJ/mol) with the direct ion exchange mechanism of Y(III) ions with the surface hydrogen ions and coordinate bond formation mechanism with the nitrogen functional groups into the available pores of the ZnGA–Si–NH–PC nanocomposite.

Carrageenan-based antimicrobial bionanocomposite films incorporated with ZnO nanoparticles stabilized by melanin

Zinc oxide nanoparticles (ZnONP) were prepared by reacting zinc acetate with KOH using melanin as a capping agent, and used for the preparation of antimicrobial carrageenan-based nanocomposite films. The ZnONP capped with melanin (mZnONP) was stable and flake-like, while the control ZnONP without capping was rod-like. ZnONPs, whether capped or not capped with melanin, were evenly dispersed in the carrageenan matrix to form smooth and flexible nanocomposite films. The mZnONP incorporated composite film (Carr/mZnONP) exhibited a higher UV-blocking property at the expense of less transparency than the control ZnONP incorporated nanocomposite film (Carr/ZnONP). The Carr/mZnONP composite film also exhibited higher thermal stability with increased mechanical and water vapor barrier properties than the Carr/ZnONP composite film. Both nanocomposite films exhibited strong antibacterial activity against Gram-negative foodborne pathogenic bacteria, E. coli, but slight antibacterial activity against Gram-positive bacteria, L. monocytogenes.

Synthesize of zinc nanoparticles using Indonesian velvet bean (Mucuna pruriens) extract and evaluate its potency in lowering catalepsy in mice

This study aims to synthesize zinc nanoparticles using Indonesian velvet bean (Mucuna pruriens) seed extract and evaluate its potency in lowering catalepsy in mice. The research conducted consist of extraction of M. pruriens seed powder, synthesis of zinc-M. pruriens seed extract nanoparticles (Zn-MPn), characterization of Zn-MPn, and catalepsy test of Zn-MPn. M. pruriens seed powder was extracted by maceration using ethanol-water (1:1) at pH 3 adjusted with citric acid. The Zn-MPn was synthesized by reacting zinc acetate dihydrate (Zn(CH3COO2)2.2H2O) solution with M. pruriens seed extract for 40 min, dispersibility of the reaction was controlled by using sonication and ultrasonic homogenizer. The Zn-MPn obtained was characterized by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), transmission electron microscopy (TEM), and Fourier-transform infrared (FTIR). Catalepsy test of Zn-MPn was conducted at doses of 5, 10, 15, 20 and 25 mg/kg body weight. The results of SEM-EDX and TEM analysis showed that the Zn-MPn formed nanoparticles with a particle diameter of 55 nm. Based on FTIR analysis, the absorption band at 464.8 cm-1 was a typical absorption indicated the Zn-O interaction on Zn-MPn. Catalepsy test showed that Zn-MPn on the all five doses were able to lower the catalepsy in mice with the best dose was 10 mg/kg body weight.

The two-dimensional to three-dimensional transition structures of ZnCo2O4 for the application of lithium-ion batteries

We prepare the transition structure of ZnCo2O4 via transformation from two-dimensional (2D) nanosheets to three-dimensional (3D) microspheres with the solvothermal method. ZnCo2O4 nanocrystallites were produced from the reaction of zinc acetate and cobalt nitrate in the non-aqueous methanol solution. The oriented attachment of ZnCo2O4 nanocrystallites results in the formation of the 2D wrinkled-paper-like structure of ZnCo2O4. The 2D ZnCo2O4 nanosheet agglomerate spontaneously because there is no appropriate surfactant, and they have weak electrical double layers in the precursor solution. As the stacking of 2D ZnCo2O4 nanosheets increased, the aggregate of ZnCo2O4 nanosheet was transformed into the 3D ZnCo2O4 microspheres. The transition structure of the ZnCo2O4 was composed of the interconnected ZnCo2O4 nanoparticles, which results in a porous structure to accommodate the volume expansion of ZnCo2O4 structure during the charge process. The transition structure of ZnCo2O4 exhibits a remarkably high specific capacity and improved cycle performance. At a current density of 100mAg−1, the transition structure of ZnCo2O4 exhibited excellent initial discharge specific capacity of 2094mAhg−1. The discharge capacity maintain at 1296.91mAhg−1 after 200 cycles. Even as current density reached to 2000mAg−1, the average specific capacity still showed 606.88mAhg−1.

Crystal structure of bis-{1-phenyl-3-methyl-4-[(quinolin-3-yl)imino-methyl-κN]-1H-pyrazol-5-olato-κO}zinc methanol 2.5-solvate from synchrotron X-ray diffraction.

The title compound, [Zn(C20H15N4O)2]·2.5CH3OH, I, was synthesized via the reaction of zinc acetate with the respective ligand and isolated as a methanol solvate, i.e., as I·2.5CH3OH. The crystal structure is triclinic (space group P-1), with two complex mol-ecules ( A and B ) and five methanol solvent mol-ecules in the asymmetric unit. One of the five methanol solvent mol-ecules is disordered over two sets of sites, with an occupancy ratio of 0.75:0.25. Mol-ecules A and B are conformers and distinguished by the conformations of the bidentate 1-phenyl-3-methyl-4-[(quinolin-3-yl)imino-meth-yl]-1H-pyrazol-5-olate ligands. In both mol-ecules, the zinc cations have distorted tetra-hedral coordination spheres, binding the monoanionic ligands through the pyrazolo-late O and imine N atoms. The two ligands adopt slightly different conformations in terms of the orientation of the terminal phenyl and quinoline substituents with respect to the central pyrazolo-late moiety. The mol-ecular geometries of A and B are supported by intra-molecular C-H⋯O and C-H⋯N hydrogen bonds. In the crystal of I, mol-ecules form dimers both by secondary inter-molecular Zn⋯O [3.140 (2)-3.553 (3) Å] and π-π stacking inter-actions. The dimers are linked by inter-molecular hydrogen bonds through the solvent methanol mol-ecules into a three-dimensional network.

Synthesis and structure of mononuclear zinc complexes with pyridine-2-aldoxime

Three mononuclear different-ligand Zn(II) complexes, [Zn(CH3COO)2(PaoH)2] (I), [Zn(PaoH)2(DMSO)2][BF4]2 (II), and [Zn(NCS)2(PaoH)2] (III) (DMSO = dimethylsulfoxide) were prepared by the reaction of zinc acetate and tetrafluoroborate with pyridine-2-aldoxime (PaoH). The composition and structure of the complexes were confirmed by IR spectroscopy and X-ray diffraction. All compounds crystallize in the monoclinic system, compounds I and II have space group P21/n, while compound III has space group C2/c. In all compounds, the Zn coordination polyhedron is a distorted octahedron, which is formed by the N4O2 sets of donor atoms in I and II and by N6 in III. Complex I in the optimal concentration of 5–10 mg/L was found to stimulate the biosynthesis of standard (pH 4.7) amylases by the micromycete Aspergillus niger CNMN FD 06.

Synthesis, characterization, and morphological control of ZnTiO3 nanoparticles through sol-gel processes and its photocatalyst application

In this work, ZnTiO3 ceramics have been synthesized from the reaction of zinc acetate (Zn(CH3COO)2·2H2O), tetrabutyl titanate (Ti(OC4H9)4) as precursors and ethanol as the solvent, in the presence benzene-1,3,5-tricarboxylic acid as a novel chelating agent by sol-gel method. The effect of various parameters such as reaction temperature, pH effect, effect of molar ratio of benzene-1,3,5-tricarboxylic acid to tetrabutyl titanate on morphology, size and purity of products was investigated. The as-prepared products were characterized by various analyses such as: X-ray diffraction (XRD), scanning and transmittance electron microscopy (SEM, TEM), X-ray energy dispersive spectroscopy (EDS), UV-vis and Fourier transform infrared spectroscopy (FT-IR) technique. The photocatalytic degradation was investigated using methyl orange (MO) under ultraviolet (UV) light irradiation. Application of this product as photocatalyst was investigated through degradation of methyl orange (MO) under UV irradiation and percentage of degradation obtained about 70% after 60min.

Synthesis, crystal structure and luminescence properties of acenaphthene benzohydrazide based ligand and its zinc(II) complex

The complex compound of zinc(II) supported by (Z)-2-hydroxy-N′-(1-oxoacenaphthylen-2(1H) ylidene)benzohydrazide ligand (H2L1) has been reported and discussed. The reaction of zinc acetate with H2L1 ligand leads to the formation of a mononuclear zinc(ii) complex, [Zn(HL1)2H2O]. The ligand, H2L1 has been characterized by elemental analysis, 1H, 13C and 1HCOSY -NMR, IR and ESI-MS, while the complex was characterized by elemental analysis, IR, and ESI-MS. The crystal structures of the free ligand H2L1 and the complex have also been determined by single crystal X-ray diffraction. The ligand chelates with metal centre with a nitrogen atom of imino moiety and an oxygen atom of enolic group. The complex shows distorted trigonal bipyramidal geometry around the metal centre with oxygen atoms lying in the equatorial plane and imino nitrogen atoms along the axial direction. The DFT/TD-DFT calculations were performed on both the ligand and its zinc complex to get insight into the structural, electronic and optical properties. The photoluminescence, fluorescence properties of the complex have been investigated.

Surface Composition of TiO2-Zn Nanotubes by NanoSIMS

Titania nanotubes were prepared by anodic oxidation of Ti. The titania surfaces were partially coated with Zn by reacting zinc acetate with the nanotubes and then annealed. [1] An annealed nanotube cluster was placed carefully on a silicon wafer using tweezers. Secondary electron images were acquired by bombarding with Cs + and observing the ejected OZn - and OTi - respectively. The SIMS analysis was done in ultra-high vacuum (∼ 10 -10 Torr). The location of before and after the SIMS analysis was confirmed by scanning electron microscopy (SEM). Specific areas with various orientations (vertical and horizontal orientations) of the nanotubes were selected for the NanoSIMS 50L analysis. The NanoSIMS 50L is made by Ametek Cameca, Gennevillieres, France and is capable of doing in situ isotopic analysis of surfaces at high spatial resolution (25 nm 2 ). The average ZnO/TiO was ∼1.8%, confirming the actual content of Zn used during synthesis of the nanotubes. Qualitatively, the TiO/ZnO ratio increased with increasing depth implying that ZnO concentration was decreasing as we probed into the nanotubes.

Characterization and Optical Study on Zinc Sulphide Nanostructures Doped with Gadolinium Ions

Zinc Sulphide doped with Gadolinium (ZnS: Gd) quantum dots have various scientific and engineering applications in electronics, nonlinear optical devices for communication, and optical computers. The material is an excellent light transmission material with high refractive index 2.27, makes useful in photonic crystal devices that operate in the region from visible to near infrared. ZnS:Gd nano materials with an average particle size of 18-23nm are synthesized by the reaction of Zinc acetate, Hydrogen Sulphide and Gadolinium oxide by chemical route technique. XRD, SEM, EDAX and FTIR characterize the samples. The average crystal size of the prepared ZnS: Gd nanopowder is determined by XRD. Band gap values Gd3+ doped ZnS were determined to 4.11eV from the optical absorption studies of the as-prepared samples and exhibited a redshift towards 301nm in comparison with undoped ZnS nanoparticles and a blue shift was observed relative to bulk ZnS.

ZnO/clay nanoarchitectures: Synthesis, characterization and evaluation as photocatalysts

In this work, ZnO-clay heterostructured materials have been prepared as novel nanoarchitectures by generation of ZnO nanoparticles (NP) on the surface of the clay mineral. The synthetic approach implies previous modification of the clay minerals by cation exchange with cetyltrimethylammonium bromide (CTAB) solutions. So, these organophilic solids can be easily dispersed in 2-propanol being further incorporated ZnO nanoparticles (NP), which in turn are formed from reaction of zinc acetate with KOH solution. Once this sol–gel reaction is achieved, the intermediate ZnO/clay organo-heterostructures can be submitted to a thermal treatment for the removal of the organic matter, which finally gives rise to the ZnO/clay nanoarchitectures. The resulting materials were characterized by XRD, FE-SEM, TEM, UV–vis, FTIR, TG and DTA, specific surface area and porosity determinations. These techniques clearly shown the structural and textural arrangements produced during the formation of the ZnO/clay nanoarchitectures. This novel type of materials act as efficient heterogeneous photocatalysts showing higher yield in the photocatalytic decomposition of methylene blue (MB) dye in water than the corresponding ZnO powder without clay prepared under similar experimental conditions.

Characterization and Elastic study on Zinc Sulphide Nanofluid Doped with Neodymium

Among the Semiconductor nanoparticle ZnS as an important II-VI semiconductor has been researched extensively because of the broad spectrum of potential application such as catalysis, cathode ray tube (CRT), field emission display (FED) phosphors for a long time. It can be used for electroluminescent devices and photodiodes. Zinc sulphide doped with Neodymium (ZnS: Nd) quantum dots have various applications in electronics, nonlinear optical devices and optical computers. ZnS: Nd nanomaterials with an average particle size of 21-25 nm are synthesized by the reaction of zinc acetate and hydrogen sulphide by chemical route technique. XRD, SEM, FTIR and EDS characterize the samples. The percentage of doping material in the crystal is confirmed from the EDS spectra. The average crystal size of the prepared ZnS nanopowder is determined by XRD. Ultrasonic velocity through doped and undoped sample is measured and compressibility is computed. The compressibility is found to be increased. Also variation of compressibility of ZnS: Nd nanofluid with various grain size have been carried out and found that compressibility increases with decrease of particle size.

The effect of Zn/S-nanoparticles on the thermal stability of Schiff-base polyamide

This study was conducted to investigate the inclusion of the Zn/S-nanoparticles in the Schiff-based polyamide producing nanocomposite material with higher thermal stability properties. The Zn/S-nanoparticles were synthesised by the reaction of zinc acetate with Thioacetamide in Ethylenediaminetetraacetic acid (EDTA). The thermal properties of polyamide, which was filled with nanoparticles, has been tested and the changes of the different temperatures as Tg (the glass temperature), Tc (the crystallisation temperature) and Tm (the melting temperature) has been recorded. It is concluded that the addition of the nanoparticles leads to polymers' thermal stability enhancement by more than 50°C.

Synthesis and Characterization of a Novel o-Vanillin Schiff Base Derivatives and Their Complexes With Zn(II)

A Schiff base compound (H2L) was synthesized using o-vanillin and o-phenylenediamine, and then the zinc Schiff base complex was obtained by the reaction of zinc acetate. They were characterized by elemental analysis, the infrared spectroscopy (IR), thermogravimetric analysis (TG), fluorescence spectrometer (PL), and antioxidative activity. For Zn(II) complex, fluorescence spectrum shows that excitation of solid sample at 380 nm produces a strong emission with the peak maximum at 596 nm, the ligands display their characteristic emission peaks at 550 nm. The results illustrate that the complex and the ligand inhibition rate were up to 42.55%, 37.27%, respectively, when the concentrations were 10 mg mL−1.