15114-25-7

Upstream product

• 112-80-1 cis-Octadecenoic acid 
• 143-19-1 sodium Oleate 
• 7646-85-7 zinc(II) chloride 
• 557-34-6 zinc diacetate 
• 557-20-0 diethylzinc 

Downstream Products

• 557-06-2 Zn(stearic acid(-H))(cis-9-octadecanoic acid(-H)) 

Relevant academic research and scientific papers

Ethanol-assisted synthesis of Zn0.5Fe2.5O4 nanocrystals in thermal solvent of paraffin

In the atmosphere of N2, low cost paraffin slices were refined and then successfully utilized as a solvent instead of the expensive high-carbon alkanes or alkenes like 1-octadecene to synthesize Zn0.5Fe2.5O4 nanocrystals at 320 °C. In the experiments, the precursor solutions of ferric and zinc oleates were stoichiometrically prepared and injected by two-step operations into the hot solvent, together with controlled amounts of ethanol to tailor their thermal decomposition performances. The synthesized Zn0.5Fe2.5O4 nanocrystals were characterized by XRD and FESEM, having uniform morphology and a quasi-monodisperse size distribution with a mean value 25 nm and a standard deviation of ±12.3%. The formation and structural characteristics of Zn0.5Fe2.5O4 nanocrystals are attributed to the catalysing function of ethanol and the effective separation of nucleation and growth of nanocrystals via the two-step injections of reactive precursors.

Ternary synthesis of colloidal Zn3P2 quantum dots

The synthesis and characterization of crystalline colloidal zinc phosphide quantum dots with observable excitonic transitions ranging between 424-535 nm (2.3-2.9 eV) are reported. A ternary combination of ZnEt2, Zn(O2CR)2, and P(SiMe3)3, forms a pentanuclear zinc cluster on mixing followed by conversion to (Et2Zn)P(ZnO2CR)2(SiMe3) in a rate-determining step prior to quantum dot formation. This journal is

Zinc carboxylic salts used as catalyst in the biodiesel synthesis by esterification and transesterification: Study of the stability in the reaction medium

Biodiesel is produced by the catalytic transesterification of renewable sources such as vegetable oils and animal fats. It is an attractive alternative to diesel fuel because of its environmental benefits. In this work, the transesterification of soybean

Contrasting melting behavior of zinc stearate and zinc oleate

The influence of a double bond in the middle of an otherwise flexible hydrocarbon chain on the melting of such assemblies has been investigated by comparing the melting behavior of zinc stearate and zinc oleate. By monitoring features in the infrared spectra that are characteristic of the global conformation of the hydrocarbon chain, it is shown that the double bond effectively decouples the thermal evolution of conformational disorder in the chain segments on either side of the double bond and the melting of each of these segments in the assembly occurs as independent events.

Large-scale synthesis of hexagonal pyramid-shaped ZnO nanocrystals from thermolysis of Zn-oleate complex

We report the large-scale synthesis of uniform-sized hexagonal pyramid-shaped ZnO nanocrystals by the thermolysis of Zn-oleate complex, which was prepared from the reaction of inexpensive and environmentally friendly reagents such as zinc chloride and sodium oleate. Under optimized reaction conditions, we were able to synthesize as much as 2.83 g using 300 mL of oleylamine and 90 mL (284 mmol) of oleic acid (OA) as both solvents and stabilizing surfactants. The UV-vis spectrum showed the absorption onset of 380 nm, and the photoluminescence spectrum showed a near band-edge emission at 387 nm and a broad blue-green emission band above 468 nm. ? 2005 American Chemical Society.

Scalable Synthesis of InAs Quantum Dots Mediated through Indium Redox Chemistry

Next-generation optoelectronic applications centered in the near-infrared (NIR) and short-wave infrared (SWIR) wavelength regimes require high-quality materials. Among these materials, colloidal InAs quantum dots (QDs) stand out as an infrared-active candidate material for biological imaging, lighting, and sensing applications. Despite significant development of their optical properties, the synthesis of InAs QDs still routinely relies on hazardous, commercially unavailable precursors. Herein, we describe a straightforward single hot injection procedure revolving around In(I)Cl as the key precursor. Acting as a simultaneous reducing agent and In source, In(I)Cl smoothly reacts with a tris(amino)arsenic precursor to yield colloidal InAs quantitatively and at gram scale. Tuning the reaction temperature produces InAs cores with a first excitonic absorption feature in the range of 700-1400 nm. A dynamic disproportionation equilibrium between In(I), In metal, and In(III) opens up additional flexibility in precursor selection. CdSe shell growth on the produced cores enhances their optical properties, furnishing particles with center emission wavelengths between 1000 and 1500 nm and narrow photoluminescence full-width at half-maximum (FWHM) of about 120 meV throughout. The simplicity, scalability, and tunability of the disclosed precursor platform are anticipated to inspire further research on In-based colloidal QDs.

Use of sulfur and selenium compounds as precursors to nanostructured materials

The presently disclosed subject matter provides processes for preparing nanocrystals, including processes for preparing core-shell nanocrystals. The presently disclosed subject matter also provides sulfur and selenium compounds as precursors to nanostructured materials. The presently disclosed subject matter also provides nanocrystals having a particular particle size distribution.

Multistage Microfluidic Platform for the Continuous Synthesis of III–V Core/Shell Quantum Dots

We present a fully continuous chip microreactor-based multistage platform for the synthesis of quantum dots with heterostructures. The use of custom-designed chip reactors enables precise control of heating profiles and flow distribution across the microfluidic channels while conducting multistep reactions. The platform can be easily reconfigured by reconnecting the differently designed chip reactors allowing for screening of various reaction parameters during the synthesis of nanocrystals. III–V core/shell quantum dots are chosen as model reaction systems, including InP/ZnS, InP/ZnSe, InP/CdS and InAs/InP, which are prepared in flow using a maximum of six chip reactors in series.

Composite nanoparticle with Janus structure and preparation method and application thereof

The invention relates to a composite nanoparticle with a Janus structure and a preparation method and application thereof. Specifically, the particle has a structure shown as a formula I and a formula II, in the formulas, X represents an oxide particle of transition metal A, Y represents an oxide particle of transition metal B, Z represents an oxide particle of transition metal C, and the particle has the characteristic of producing a magnetic resonance imaging weighting signal. When the transition metal is Mn, a transition metal oxide is Mn3O4. The invention further discloses the preparation method and application of the particle. The particle is applied to the weighting MRI process, a clearer imaging effect and higher sensitivity than flat scanning can be obtained, and the treatment process can also be visually monitored in real time.

Lethal photosensitisation of Staphylococcus aureus and Escherichia coli using crystal violet and zinc oxide-encapsulated polyurethane

Crystal violet and zinc oxide nanoparticles (CVZnO) were incorporated into medical grade polyurethane polymers by a two-step dipping procedure to prepare novel bactericidal surfaces. The photobactericidal activity of CVZnO polyurethane samples was tested against the Gram-positive bacterium, Staphylococcus aureus and the Gram-negative bacterium, Escherichia coli. Exposure of the polymer samples to white light induced the lethal photosensitisation of both S. aureus and E. coli. In addition, this novel system demonstrated significant antibacterial activity under dark conditions against S. aureus within 2 hours, but more remarkably, a 99.9% reduction in the numbers of E. coli within 4 hours in the dark. This is, to the best of our knowledge, the most potent 'dark-kill' by a light activated antimicrobial agent ever reported. The singlet oxygen quenchers, bovine serum albumin and l-histidine, and an enzyme which catalyses the decomposition of hydrogen peroxide, bovine catalase, were incorporated into the antibacterial assays to determine if the mechanism of E. coli kill involved a Type 1 or a Type 2 light-activated process.