Category: 112-89-0

112-89-0, Name is 1-Bromooctadecane, molecular formula is C18H37Br, belongs to bromides-buliding-blocks compound, is a common compound. In a patnet, author is Hofmann, Felix J., once mentioned the new application about 112-89-0, Product Details of 112-89-0.

Energy Transfer from Perovskite Nanocrystals to Dye Molecules Does Not Occur by FRET

Single formamidinium lead bromide (FAPbBr(3)) perovskite nanocubes, approximately 10 nm in size, have extinction cross sections orders of magnitude larger than single dye molecules and can therefore be used to photoexcite one single dye molecule within their immediate vicinity by means of excitation-energy transfer (EET). The rate of photon emission by the single dye molecule is increased by 2 orders of magnitude under excitation by EET compared to direct excitation at the same laser fluence. Because the dye cannot accommodate biexcitons, NC biexcitons are filtered out by EET, giving rise to up to an order-of-magnitude improvement in the fidelity of photon antibunching. We demonstrate here that, contrary to expectation, energy transfer from the nanocrystal to dye molecules does not depend on the spectral line widths of the donor and acceptor and is therefore not governed by Forster’s theory of resonance energy transfer (FRET). Two different cyanine dye acceptors with substantially different spectral overlaps with the nanocrystal donor show a similar light-harvesting capability. Cooling the sample from room temperature to 5 K reduces the average transition line widths 25-fold but has no apparent effect on the number of molecules emitting, i.e., on the spatial density of single dye molecules being photoexcited by single nanocrystals. Narrow zero-phonon lines are identified for both donor and acceptor, with an energetic separation of over 40 times the line width, implying a complete absence of spectral overlap-even though EET is evident. Both donor and acceptor exhibit spectral fluctuations, but no correlation is apparent between the jitter, which controls spectral overlap, and the overall light harvesting. We conclude that the energy transfer process is fundamentally nonresonant, implying effective energy dissipation in the perovskite donor because of strong electron-phonon coupling of the carriers comprising the exciton. The work highlights the importance of performing cryogenic spectroscopy to reveal the underlying mechanisms of energy transfer in complex donor-acceptor systems.

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Chemistry is traditionally divided into organic and inorganic chemistry. The former is the study of compounds containing at least one carbon-hydrogen bonds. 112-89-0, Name is 1-Bromooctadecane, molecular formula is C18H37Br, belongs to bromides-buliding-blocks compound, is a common compound. In a patnet, author is Uddin, Ain, once mentioned the new application about 112-89-0, Category: bromides-buliding-blocks.

Functional Poly(p-xylylene)s via Chemical Reduction of Poly(p-phenylenevinylene)s

The synthesis of poly(p-xylylene)s (PPXs) with side chains containing alkyl bromide functionality, and their postpolymer modification, is described. The PPXs were prepared by a diimide hydrogenation of spoly(p-phenylenevinylene)s (PPVs) that were originally synthesized by a Gilch polymerization. The polymer backbone reduction was performed with hydrazine hydrate in toluene at 80 degrees C to provide polymers with the side-chain-containing bromide functionality intact. To demonstrate post-polymer modification of the side chains, the resulting PPX polymers were modified with trimethylamine to form the tetraalkylammonium ion functionality and were evaluated as anion conducting membranes. While PPX homopolymers containing tetralkylammonium ions were completely water-soluble and not able to form valuable films, PPX copolymers containing mixed tetraalkylammonium ions and hydrophobic chains were capable of film formation and alkaline stability. In addition, an in situ cross-linking process that used N,N,N’,N’-tetramethyl-1,6-hexanediamine during the tetraalkylammonium formation of brominated PPX polymers was also evaluated and gave reasonable films with conductivities of similar to 10 mS cm(-1).

We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, 112-89-0. The above is the message from the blog manager. Category: bromides-buliding-blocks.

Related Products of 112-89-0, As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. 112-89-0, Name is 1-Bromooctadecane, SMILES is CCCCCCCCCCCCCCCCCCBr, belongs to bromides-buliding-blocks compound. In a article, author is Bretler, Sharon, introduce new discover of the category.

In-situ thin coating of silica micro/nano-particles on polymeric films and their anti-fogging application

Polymeric films, e.g., polyethylene (PE), coated with a thin layer of silica micro/nano-particles (SiO2 M/NPs) were prepared using a modified Stober method in the presence of corona treated and non-treated PE films. The obtained films were washed of excess reagents and non-bonded (free) SiO2 M/NPs and dried. Only the corona treated PE films were coated with a thin layer of SiO2 M/NPs while the non-treated films were almost empty of bound SiO2 particles. PE films composed of bound mesoporous silica NPs were similarly prepared with the addition of cetyltrimethylammonium bromide (CTAB) in the polymerization process. The effect of various polymerization parameters, e.g., tetraethylorthosilicate (TEOS) concentration, ammonium hydroxide concentration and the volume ratio [ethanol]/[water], on the diameter and diameter distribution of the free and surface bound particles were elucidated. Characterization of the SiO2 coated films was accomplished by routine methods such as DLS, HRSEM, water contact angle measurements, AFM and FIB. The SiO2 M/NP coatings on the PE films were found to be durable and did not significantly affect the optical properties of the film. Among the different types of SiO2 coated PE films prepared in our lab only those prepared with CTAB were found to be highly suitable for anti-fogging use. This process of SiO2 coating may be used for many other polymeric films, e.g., PET, PP, PMMA, PC, PVC, etc. as well as for various applications such as superhydrophobic, antimicrobial or UV blocking coatings. This can be done by binding long hydrophobic silane compounds (e.g., octadodecyl trichlorosilane), a positively charged silane compound or a UV absorbing silane, respectively, to the bound SiO2 particle surfaces.

Related Products of 112-89-0, Because enzymes can increase reaction rates by enormous factors and tend to be very specific, typically producing only a single product in quantitative yield, they are the focus of active research.you can also check out more blogs about 112-89-0.

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Formula: C18H37Br, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 112-89-0, Name is 1-Bromooctadecane, molecular formula is C18H37Br. In an article, author is Shull, Timothy E.,once mentioned of 112-89-0.

Inhibition of Fusarium oxysporum f. sp. nicotianae Growth by Phenylpropanoid Pathway Intermediates

Fusarium wilt in tobacco caused by the fungus Fusarium oxysporum f. sp. nicotianae is a disease-management challenge worldwide, as there are few effective and environmentally benign chemical agents for its control. This challenge results in substantial losses in both the quality and yield of tobacco products. Based on an in vitro analysis of the effects of different phenylpropanoid intermediates, we found that the early intermediates trans-cinnamic acid and para-coumaric acid effectively inhibit the mycelial growth of F. oxysporum f. sp. nicotianae strain FW316F, whereas the downstream intermediates quercetin and caffeic acid exhibit no fungicidal properties. Therefore, our in vitro screen suggests that trans-cinnamic acid and para-coumaric acid are promising chemical agents and natural lead compounds for the suppression of F. oxysporum f. sp. nicotianae growth.

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Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , Recommanded Product: 112-89-0, 112-89-0, Name is 1-Bromooctadecane, molecular formula is C18H37Br, belongs to bromides-buliding-blocks compound. In a document, author is Tran, Thien V., introduce the new discover.

Phospholipase A(2) from krait Bungarus fasciatus venom induces human cancer cell death in vitro

Background: Snake venoms are the complex mixtures of different compounds manifesting a wide array of biological activities. The venoms of kraits (genus Bungarus, family Elapidae) induce mainly neurological symptoms; however, these venoms show a cytotoxicity against cancer cells as well. This study was conducted to identify in Bungarus fasciatus venom an active compound(s) exerting cytotoxic effects toward MCF7 human breast cancer cells and A549 human lung cancer cells. Methods: The crude venom of B. fasciatus was separated by gel-filtration on Superdex HR 75 column and reversed phase HPLC on C18 column. The fractions obtained were screened for cytotoxic effect against MCF7, A549, and HK2 cell lines using colorimetric assay with the tetrazolium dye MTT- 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide. The primary structure of active protein was established by ultra high resolution LC-MS/MS. The molecular mechanism of the isolated protein action on MCF7 cells was elucidated by flow cytometry. Results: MTT cell viability assays of cancer cells incubated with fractions isolated from B. fasciatus venom revealed a protein with molecular mass of about 13 kDa possessing significant cytotoxicity. This protein manifested the dose and time dependent cytotoxicity for MCF7 and A549 cell lines while showed no toxic effect on human normal kidney HK2 cells. In MCF7, flow cytometry analysis revealed a decrease in the proportion of Ki-67 positive cells. As Ki-67 protein is a cellular marker for proliferation, its decline indicates the reduction in the proliferation of MCF7 cells treated with the protein. Flow cytometry analysis of MCF7 cells stained with propidium iodide and Annexin V conjugated with allophycocyanin showed that a probable mechanism of cell death is apoptosis. Mass spectrometric studies showed that the cytotoxic protein was phospholipase A(2). The amino acid sequence of this enzyme earlier was deduced from cloned cDNA, and in this work it was isolated from the venom as a protein for the first time. It is also the first krait phospholipase A(2) manifesting the cytotoxicity for cancer cells.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 112-89-0. Recommanded Product: 112-89-0.

Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 112-89-0, Name is 1-Bromooctadecane, SMILES is CCCCCCCCCCCCCCCCCCBr, belongs to bromides-buliding-blocks compound. In a document, author is Zheng, Jianqi, introduce the new discover, COA of Formula: C18H37Br.

Mesoporous Carbons Derived from Pyrolysis of Organosilica-Based Ionogels for Oxygen Reduction Reaction

Developing of novel carbon-based materials for electrocatalytic oxygen reduction reaction is highly important for sustainable energy conversion. In this work, iron-containing ionogels were prepared from functional ionic liquid 1-propionic acid-2-methyl imidazole bromide as the linker and an organically-modified silica framework as the host, which were polymerized in the presence of iron(III) nitrate nonahydrate. The ionogels are mechanically stable, yellowish and transparent. After pyrolysis and washing by acid, unique mesoporous carbon materials were innovatively synthesized. Moreover, the as-obtained carbon materials possess very high surface areas (1127 m(2) g(-1)), significant mesoporosity and abundant catalytic sites (e. g., effective N configurations). The optimal catalyst exhibits remarkable ORR activity with an onset potential (E-onset) of 0.98 V vs. RHE, a half-wave potential (E-1/2) of 0.823 V vs. RHE and a diffusion-limited current density (j(L)) of 5.75 mAcm(-2) in 0.1 M KOH, comparable to the commercial Pt/C catalyst in the same condition. This work provided a new strategy to fabricate promising electrocatalyts for application in fuel cells.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 112-89-0 is helpful to your research. COA of Formula: C18H37Br.

#REF!

Bimetallic PdxNi1-x and PdxCo1-x nanoparticles supported on K-OMS-2: Highly active, environmentally friendly and reusable nanocatalysts for the Suzuki-Miyaura cross-coupling reactions in water

Addressed herein is the catalysis of bimetallic PdxNi1-x and PdxCo1-x nanoparticles (NPs) supported on a cryptomelane-type manganese oxide (K-OMS-2) solid for the Suzuki-Miyaura cross-couplings of phenylboronic acid with various aryl halides. Bimetallic PdxNi1-x and PdxCo1-x NPs were prepared by using a conventional one-step impregnation-reduction method. Among these catalysts with different compositions of Ni and Pd or Co and Pd, the Pd0.2Ni0.8 and Pd0.2Co0.8 catalysts showed the highest activity in the Suzuki-Miyaura cross-couplings of various aryl halides including iodides, bromides, and even chlorides with phenylboronic acid in ambient air and water under reflux conditions. The Suzuki-Miyaura cross-coupling reaction proceeded efficiently in the presence of Pd0.2Ni0.8@K-OMS-2 and Pd0.2Co0.8@K-OMS-2 NPs under the optimized conditions in water. Pd0.2Ni0.8@K-OMS-2 and Pd0.2Co0.8@K-OMS-2 NPs provided high conversions up to 98% and 99% and turnover frequencies of 11,760 and 11,880 h(-1) in the cross-coupling of phenylboronic acid with 1-bromo-4-nitrobenzene. More importantly, these new supported Pd0.2Ni0.8@K-OMS-2 and Pd0.2Co0.8@K-OMS-2 NPs were found to be highly durable nanocatalyst throughout the reusability experiments, and they maintain almost their inherent activity after 10th and 5th catalytic cycle, respectively. Bimetallic Pd0.2Ni0.8@K-OMS-2 and Pd0.2Co0.8@K-OMS-2 NPs were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), scanning electron microscopy with energy dispersive X-ray (SEM-EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and ICAPQ inductively coupled plasma mass spectroscopy (ICP-MS) analyses.

If you are hungry for even more, make sure to check my other article about 112-89-0, Recommanded Product: 1-Bromooctadecane.

Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, 112-89-0, Name is 1-Bromooctadecane, SMILES is CCCCCCCCCCCCCCCCCCBr, belongs to bromides-buliding-blocks compound. In a document, author is Pourranjbar, Mohammad, introduce the new discover, COA of Formula: C18H37Br.

Experimental Measurements and Thermodynamic Modeling of Hydrate Dissociation Conditions for Methane plus TBAB plus NaCl, MgCl2, or NaCl-MgCl2 + Water Systems

Much attention has been made to solidified natural gas (SNG) technology via clathrate hydrates in recent years. Tetra-n-butyl ammonium bromide (TBAB) is known as a promising promoter to tackle hydrate technology limitations. This research focuses on investigating the effect of NaCl, MgCl2, and the mixture of NaCl + MgCl2 (two major soluble salts in naturally occurring water are NaCl and MgCl2) on hydrate stability conditions of methane in the presence of TBAB aqueous solution. An isochoric pressure search method was employed to generate the dissociation/ equilibrium data in the temperature, pressure, and TBAB composition ranges of 275-291 K, 0.5-5.5 MPa, and 5-20 wt %, respectively. The experimental results reveal that in the case of WTBAB = 5%, NaCl and MgCl2 with the low concentration of 5% have a promotion effect for the systems of CH4 + TBAB + NaCl + H2O, CH4 + TBAB + MgCl2 + H2O, and CH4 + TBAB + NaCl + MgCl2 + H2O and shift the dissociation curve toward milder region (higher temperature and lower pressure). However, in the case of W-TBAB = 20%, NaCl and MgCl2 play an inhibition role in all of the aforementioned systems. A thermodynamic model was developed based on the van der Waals-Platteeuw (vdWP) solid solution theory, to predict the behavior of methane in the presence of the promoter in saline water. The Peng-Robinson equation of the state (PR EOS) is used to describe the thermodynamic properties of the gas phase, and the electrolyte non-random two-liquid (e-NRTL) activity coefficient model is employed to determine the activity coefficient of water and promoter in the electrolyte solution. The presented model results are in satisfactory agreement with the experimental data generated in this work. The discrepancy of the model results with experimental is 10.78%.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 112-89-0 is helpful to your research. COA of Formula: C18H37Br.

Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics, 112-89-0, Name is 1-Bromooctadecane, SMILES is CCCCCCCCCCCCCCCCCCBr, belongs to bromides-buliding-blocks compound. In a document, author is Pourranjbar, Mohammad, introduce the new discover, COA of Formula: C18H37Br.

Experimental Measurements and Thermodynamic Modeling of Hydrate Dissociation Conditions for Methane plus TBAB plus NaCl, MgCl2, or NaCl-MgCl2 + Water Systems

Much attention has been made to solidified natural gas (SNG) technology via clathrate hydrates in recent years. Tetra-n-butyl ammonium bromide (TBAB) is known as a promising promoter to tackle hydrate technology limitations. This research focuses on investigating the effect of NaCl, MgCl2, and the mixture of NaCl + MgCl2 (two major soluble salts in naturally occurring water are NaCl and MgCl2) on hydrate stability conditions of methane in the presence of TBAB aqueous solution. An isochoric pressure search method was employed to generate the dissociation/ equilibrium data in the temperature, pressure, and TBAB composition ranges of 275-291 K, 0.5-5.5 MPa, and 5-20 wt %, respectively. The experimental results reveal that in the case of WTBAB = 5%, NaCl and MgCl2 with the low concentration of 5% have a promotion effect for the systems of CH4 + TBAB + NaCl + H2O, CH4 + TBAB + MgCl2 + H2O, and CH4 + TBAB + NaCl + MgCl2 + H2O and shift the dissociation curve toward milder region (higher temperature and lower pressure). However, in the case of W-TBAB = 20%, NaCl and MgCl2 play an inhibition role in all of the aforementioned systems. A thermodynamic model was developed based on the van der Waals-Platteeuw (vdWP) solid solution theory, to predict the behavior of methane in the presence of the promoter in saline water. The Peng-Robinson equation of the state (PR EOS) is used to describe the thermodynamic properties of the gas phase, and the electrolyte non-random two-liquid (e-NRTL) activity coefficient model is employed to determine the activity coefficient of water and promoter in the electrolyte solution. The presented model results are in satisfactory agreement with the experimental data generated in this work. The discrepancy of the model results with experimental is 10.78%.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 112-89-0 is helpful to your research. COA of Formula: C18H37Br.

#REF!

Bimetallic PdxNi1-x and PdxCo1-x nanoparticles supported on K-OMS-2: Highly active, environmentally friendly and reusable nanocatalysts for the Suzuki-Miyaura cross-coupling reactions in water

Addressed herein is the catalysis of bimetallic PdxNi1-x and PdxCo1-x nanoparticles (NPs) supported on a cryptomelane-type manganese oxide (K-OMS-2) solid for the Suzuki-Miyaura cross-couplings of phenylboronic acid with various aryl halides. Bimetallic PdxNi1-x and PdxCo1-x NPs were prepared by using a conventional one-step impregnation-reduction method. Among these catalysts with different compositions of Ni and Pd or Co and Pd, the Pd0.2Ni0.8 and Pd0.2Co0.8 catalysts showed the highest activity in the Suzuki-Miyaura cross-couplings of various aryl halides including iodides, bromides, and even chlorides with phenylboronic acid in ambient air and water under reflux conditions. The Suzuki-Miyaura cross-coupling reaction proceeded efficiently in the presence of Pd0.2Ni0.8@K-OMS-2 and Pd0.2Co0.8@K-OMS-2 NPs under the optimized conditions in water. Pd0.2Ni0.8@K-OMS-2 and Pd0.2Co0.8@K-OMS-2 NPs provided high conversions up to 98% and 99% and turnover frequencies of 11,760 and 11,880 h(-1) in the cross-coupling of phenylboronic acid with 1-bromo-4-nitrobenzene. More importantly, these new supported Pd0.2Ni0.8@K-OMS-2 and Pd0.2Co0.8@K-OMS-2 NPs were found to be highly durable nanocatalyst throughout the reusability experiments, and they maintain almost their inherent activity after 10th and 5th catalytic cycle, respectively. Bimetallic Pd0.2Ni0.8@K-OMS-2 and Pd0.2Co0.8@K-OMS-2 NPs were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), scanning electron microscopy with energy dispersive X-ray (SEM-EDX), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and ICAPQ inductively coupled plasma mass spectroscopy (ICP-MS) analyses.

If you are hungry for even more, make sure to check my other article about 112-89-0, Recommanded Product: 1-Bromooctadecane.